Yuan Deng, Danni Peng, Cheng-Long Shen, Junlu Sun, Guangsong Zheng, Shulong Chang, Yachuan Liang, Jun He, Chong-Xin Shan, Lin Dong
Persistent mechanoluminescence (PML) is highly desirable for its ability to overcome transient-emitting behavior, but its applications are hindered by the limited emission wavelengths. Herein, a universal chemical interlinkage-assisted efficient energy transfer (ET) strategy is introduced to achieve color conversion from green to red in traditional PML materials. A straightforward chemical route to create the RhB@SiO2/SAOED system is established via covalent chemical interlinkage by depositing mesoporous silica-encapsulated Rhodamine B (RhB) nanoparticles (RhB@SiO2) onto SrAl2O4:Eu, Dy (SAOED) particles. The resulting system exhibits a high ET efficiency of 53.5%. The multicolor PML of the RhB@SiO2/SAOED system remains visible to the naked eye for exceeding 28 s after mechanical stimulation. With this unique PML behavior, the RhB@SiO2/SAOED system demonstrates the potential applications ranging from visualized reading activities to multi-mode anticounterfeiting. This universal PML color-conversion strategy provides a new approach to high-performance mechanical light energy-conversion systems and may further inspire more diverse functional applications of classical PML materials.
{"title":"Energy Transfer-Assisted Color Conversion of Persistent Mechanoluminescence in RhB@SiO2/SrAl2O4:Eu,Dy System for Multilevel Information Encryption","authors":"Yuan Deng, Danni Peng, Cheng-Long Shen, Junlu Sun, Guangsong Zheng, Shulong Chang, Yachuan Liang, Jun He, Chong-Xin Shan, Lin Dong","doi":"10.1002/lpor.202400251","DOIUrl":"https://doi.org/10.1002/lpor.202400251","url":null,"abstract":"Persistent mechanoluminescence (PML) is highly desirable for its ability to overcome transient-emitting behavior, but its applications are hindered by the limited emission wavelengths. Herein, a universal chemical interlinkage-assisted efficient energy transfer (ET) strategy is introduced to achieve color conversion from green to red in traditional PML materials. A straightforward chemical route to create the RhB@SiO<sub>2</sub>/SAOED system is established via covalent chemical interlinkage by depositing mesoporous silica-encapsulated Rhodamine B (RhB) nanoparticles (RhB@SiO<sub>2</sub>) onto SrAl<sub>2</sub>O<sub>4</sub>:Eu, Dy (SAOED) particles. The resulting system exhibits a high ET efficiency of 53.5%. The multicolor PML of the RhB@SiO<sub>2</sub>/SAOED system remains visible to the naked eye for exceeding 28 s after mechanical stimulation. With this unique PML behavior, the RhB@SiO<sub>2</sub>/SAOED system demonstrates the potential applications ranging from visualized reading activities to multi-mode anticounterfeiting. This universal PML color-conversion strategy provides a new approach to high-performance mechanical light energy-conversion systems and may further inspire more diverse functional applications of classical PML materials.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141489651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Observing transient events is of great importance for understanding fundamental principles and further controlling the related processes. To surmount the limitations of human vision, special tools are required to detect and record these transient events. Among existing approaches, framing photography stands out by its high spatiotemporal resolution with a 2D field of view and low crosstalk between adjacent frames. This review aims to summarize the technical routes of framing photography and provide a guide for choosing suitable tools for the observation of transient phenomena. The basic principles of framing photography are introduced and then an overview of the main categories by analyzing the system configurations and working principles are presented. Then, the existing devices are classified into mechanical, electrical, and optical framing photography. For each category, representative techniques and applications are discussed. Finally, a prospect for framing photography is provided.
{"title":"Capturing Transient Events in Series: A Review of Framing Photography","authors":"Yunhua Yao, Xianglei Liu, Dalong Qi, Jiali Yao, Chengzhi Jin, Yu He, Zhengqi Huang, Yilin He, Yuecheng Shen, Lianzhong Deng, Zhiyong Wang, Zhenrong Sun, Jinyang Liang, Shian Zhang","doi":"10.1002/lpor.202400219","DOIUrl":"https://doi.org/10.1002/lpor.202400219","url":null,"abstract":"Observing transient events is of great importance for understanding fundamental principles and further controlling the related processes. To surmount the limitations of human vision, special tools are required to detect and record these transient events. Among existing approaches, framing photography stands out by its high spatiotemporal resolution with a 2D field of view and low crosstalk between adjacent frames. This review aims to summarize the technical routes of framing photography and provide a guide for choosing suitable tools for the observation of transient phenomena. The basic principles of framing photography are introduced and then an overview of the main categories by analyzing the system configurations and working principles are presented. Then, the existing devices are classified into mechanical, electrical, and optical framing photography. For each category, representative techniques and applications are discussed. Finally, a prospect for framing photography is provided.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141495499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Corresponding to the different phase‐shifts of the interference modes, the whispering gallery mode resonator‐based Fano resonance exhibits a variety of unique spectral lineshapes that can be applied to sensing, optical signal processing, and so on. However, most approaches to lineshape tuning aim to alter the propagation phase‐shift or coupling strength, and generally suffer from relatively low efficiency and limited tuning range. In this paper, with a carefully designed waveguide‐taper coupled micro‐ring resonator structure and the assistance with the grating‐coupler, for the first time a near full‐lineshape selectivity of the Fano resonance is demonstrated in two isolated tuning dimensions of the frequency and transverse space, which means arbitrary lineshapes including the Lorentzian‐dip, asymmetric Fano peak or electromagnetically‐induced‐transparency (EIT)‐like peak can be obtained at a specific resonance wavelength in the whole C‐band. In addition to the different types of line shapes, the extinction ratio can also be enhanced by dynamically tuning the coupling position. This research provides an efficient approach to manipulate the transmission spectra of the Fano resonance, which is of great importance in promoting its further applications on integrated photonics platforms.
与干涉模式的不同相移相对应，基于耳语画廊模式谐振器的法诺共振呈现出各种独特的光谱线形，可应用于传感、光信号处理等领域。然而，大多数线形调谐方法都以改变传播相移或耦合强度为目标，普遍存在效率相对较低和调谐范围有限的问题。本文利用精心设计的波导锥耦合微环谐振器结构，并在光栅耦合器的辅助下，首次在频率和横向空间两个独立的调谐维度上展示了法诺共振的近乎全线形选择性，这意味着可以在整个 C 波段的特定共振波长上获得任意线形，包括洛伦兹倾角、非对称法诺峰或类似电磁诱导透明（EIT）的峰值。除了不同类型的线形外，还可以通过动态调整耦合位置来提高消光比。这项研究为操纵法诺共振的透射光谱提供了一种有效的方法，对促进其在集成光子学平台上的进一步应用具有重要意义。
{"title":"Frequency‐Space Selective Fano Resonance Based on a Micro‐Ring Resonator on Lithium Niobate on Insulator","authors":"Tingge Yuan, Xueyi Wang, Jiangwei Wu, Hao Li, Yuping Chen, Xianfeng Chen","doi":"10.1002/lpor.202400457","DOIUrl":"https://doi.org/10.1002/lpor.202400457","url":null,"abstract":"Corresponding to the different phase‐shifts of the interference modes, the whispering gallery mode resonator‐based Fano resonance exhibits a variety of unique spectral lineshapes that can be applied to sensing, optical signal processing, and so on. However, most approaches to lineshape tuning aim to alter the propagation phase‐shift or coupling strength, and generally suffer from relatively low efficiency and limited tuning range. In this paper, with a carefully designed waveguide‐taper coupled micro‐ring resonator structure and the assistance with the grating‐coupler, for the first time a near full‐lineshape selectivity of the Fano resonance is demonstrated in two isolated tuning dimensions of the frequency and transverse space, which means arbitrary lineshapes including the Lorentzian‐dip, asymmetric Fano peak or electromagnetically‐induced‐transparency (EIT)‐like peak can be obtained at a specific resonance wavelength in the whole C‐band. In addition to the different types of line shapes, the extinction ratio can also be enhanced by dynamically tuning the coupling position. This research provides an efficient approach to manipulate the transmission spectra of the Fano resonance, which is of great importance in promoting its further applications on integrated photonics platforms.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141489146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yibiao Hu, Jiajing He, Zhouyuan Yan, Chang Xu, Xiaobo Li, Ning Wei, Yan Wang, Ningning Dong, Jun Wang
Conventional research on linear polarization photodetector for 2D materials has focused on the search for different anisotropic materials, combinations between materials, introducing plasmonic structures, and patterning 2D materials to improve performance. However, these methods provide limited improvement in polarization sensitivity. Here, a balanced photodetector structure is proposed that does not require an additional process and relies only on the presence of anisotropy in the material itself to substantially improve the polarization sensitivity. The balanced photodetector consists of two ReS2 photodetectors, where the single ReS2 photodetector exhibits excellent performance at 650 nm illumination, including a responsivity and detectivity of 0.28 A W−1 and 4.22 × 109 Jones. Benefiting from the anisotropy of ReS2, the single photodetector achieves excellent polarization sensitivity of 2.79 at 650 nm. The balanced photodetector system achieves an excellent performance of ≈20 dB linear polarization extinction ratio and 0.003° Hz−1/2 noise equivalent light polarization difference at 100 kHz. These performances can also be further optimized by adjusting the gate voltage. The results provide a basis for further development of high-performance polarization photodetector for 2D materials.
二维材料线性偏振光电探测器的传统研究主要集中在寻找不同的各向异性材料、材料之间的组合、引入等离子体结构以及对二维材料进行图案化以提高性能。然而，这些方法只能有限地提高偏振灵敏度。在这里，我们提出了一种平衡光电探测器结构，它不需要额外的工艺，仅依靠材料本身的各向异性就能大幅提高偏振灵敏度。该平衡光电探测器由两个 ReS2 光电探测器组成，其中单个 ReS2 光电探测器在 650 纳米光照下表现出卓越的性能，包括 0.28 A W-1 的响应率和 4.22 × 109 Jones 的检测率。得益于 ReS2 的各向异性，单个光电探测器在 650 纳米波长下的偏振灵敏度高达 2.79。平衡光电探测器系统实现了≈20 dB 的线性偏振消光比和 0.003° Hz-1/2 噪声等效光偏振差（100 kHz）的优异性能。这些性能还可以通过调整栅极电压进一步优化。这些结果为进一步开发二维材料的高性能偏振光电探测器奠定了基础。
{"title":"High Performance Balanced Linear Polarization Photodetector Based on 2D ReS2","authors":"Yibiao Hu, Jiajing He, Zhouyuan Yan, Chang Xu, Xiaobo Li, Ning Wei, Yan Wang, Ningning Dong, Jun Wang","doi":"10.1002/lpor.202400661","DOIUrl":"https://doi.org/10.1002/lpor.202400661","url":null,"abstract":"Conventional research on linear polarization photodetector for 2D materials has focused on the search for different anisotropic materials, combinations between materials, introducing plasmonic structures, and patterning 2D materials to improve performance. However, these methods provide limited improvement in polarization sensitivity. Here, a balanced photodetector structure is proposed that does not require an additional process and relies only on the presence of anisotropy in the material itself to substantially improve the polarization sensitivity. The balanced photodetector consists of two ReS<sub>2</sub> photodetectors, where the single ReS<sub>2</sub> photodetector exhibits excellent performance at 650 nm illumination, including a responsivity and detectivity of 0.28 A W<sup>−1</sup> and 4.22 × 10<sup>9</sup> Jones. Benefiting from the anisotropy of ReS<sub>2</sub>, the single photodetector achieves excellent polarization sensitivity of 2.79 at 650 nm. The balanced photodetector system achieves an excellent performance of ≈20 dB linear polarization extinction ratio and 0.003° Hz<sup>−1/2</sup> noise equivalent light polarization difference at 100 kHz. These performances can also be further optimized by adjusting the gate voltage. The results provide a basis for further development of high-performance polarization photodetector for 2D materials.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141463653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lithium niobate (LN) crystal with anti-reflective subwavelength structures (ASSs) has great applications in high-power tunable optical parametric oscillator (OPO) lasers. However, it is still a great challenge to 3D nanofabrication of LN ASSs. Herein, a wet-etching-assisted laser polarization domain inversion (WE-LPDI) technology is proposed to fabricate periodic cone arrays with a period from 200 nm to 4 µm on LN. Based on the optimized structural parameters, large-area LN ASSs with a period of 1.3 µm and a height of 1.7 µm were fabricated on LN, which exhibits an average transmittance of 3–5 µm increasing from 78% to 85% and a highest transmittance of 88% at 5 µm. It has been demonstrated that the LN ASSs show high stability under high-temperature and high-power laser irradiation, which shows potential applications for high-power mid-IR lasers. The results indicate that the WE-LPDI technology provides a novel way for 3D nanofabrication of LN.
{"title":"Nanofabrication of Lithium Niobate Anti-Reflective Subwavelength Structures for High Power Mid-Infrared Lasers","authors":"Jia-Xin Zheng, Xue-Qing Liu, Ke-Shuai Tian, Hong-Yu Li, Xin Zhang, Zhen-Nan Tian, Meng-Dan Qian, Lei Wang, Qi-Dai Chen","doi":"10.1002/lpor.202400546","DOIUrl":"https://doi.org/10.1002/lpor.202400546","url":null,"abstract":"Lithium niobate (LN) crystal with anti-reflective subwavelength structures (ASSs) has great applications in high-power tunable optical parametric oscillator (OPO) lasers. However, it is still a great challenge to 3D nanofabrication of LN ASSs. Herein, a wet-etching-assisted laser polarization domain inversion (WE-LPDI) technology is proposed to fabricate periodic cone arrays with a period from 200 nm to 4 µm on LN. Based on the optimized structural parameters, large-area LN ASSs with a period of 1.3 µm and a height of 1.7 µm were fabricated on LN, which exhibits an average transmittance of 3–5 µm increasing from 78% to 85% and a highest transmittance of 88% at 5 µm. It has been demonstrated that the LN ASSs show high stability under high-temperature and high-power laser irradiation, which shows potential applications for high-power mid-IR lasers. The results indicate that the WE-LPDI technology provides a novel way for 3D nanofabrication of LN.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141463535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hanchuan Chen, Yichao Liu, Fei Sun, Qianhan Sun, Xiaoxiao Wu, Ran Sun
The simultaneous concentration of electromagnetic (EM) waves and heat fluxes in the same target region within an on‐chip system has substantial academic research importance and practical application value. However, the existing research is primarily aimed at the design and experimentation of concentrators for individual EM waves or temperature fields. In this study, a thermal‐EM concentrator capable of simultaneously concentrating EM waves and heat fluxes is designed using transformation optics and thermodynamics and fabricated using engineered thermal‐EM metamaterials. Both the numerically simulated and experimentally measured results demonstrate the concentrating capability of the proposed thermal‐EM concentrator, which can concentrate broadband transverse magnetic (TM)‐polarized EM waves ranging from 8 to 12 GHz and heat flux to the same target region within an on‐chip operating environment. The proposed thermal‐EM concentrator can be utilized for the efficient cooling of the specified component and for simultaneously enhancing the radiation and reception efficiency of the EM antenna within an on‐chip system.
{"title":"A Thermal–EM Concentrator for Enhancing EM Signals and Focusing Heat Fluxes Simultaneously","authors":"Hanchuan Chen, Yichao Liu, Fei Sun, Qianhan Sun, Xiaoxiao Wu, Ran Sun","doi":"10.1002/lpor.202400488","DOIUrl":"https://doi.org/10.1002/lpor.202400488","url":null,"abstract":"The simultaneous concentration of electromagnetic (EM) waves and heat fluxes in the same target region within an on‐chip system has substantial academic research importance and practical application value. However, the existing research is primarily aimed at the design and experimentation of concentrators for individual EM waves or temperature fields. In this study, a thermal‐EM concentrator capable of simultaneously concentrating EM waves and heat fluxes is designed using transformation optics and thermodynamics and fabricated using engineered thermal‐EM metamaterials. Both the numerically simulated and experimentally measured results demonstrate the concentrating capability of the proposed thermal‐EM concentrator, which can concentrate broadband transverse magnetic (TM)‐polarized EM waves ranging from 8 to 12 GHz and heat flux to the same target region within an on‐chip operating environment. The proposed thermal‐EM concentrator can be utilized for the efficient cooling of the specified component and for simultaneously enhancing the radiation and reception efficiency of the EM antenna within an on‐chip system.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141463949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The bidirectional asymmetric transmission (BAT) meta-devices have attracted widespread attention as an emerging display, encryption, and information storage platform. Generally, the multiplexing capability of BAT meta-devices determines the upper limit of the loading capacity of multi-task integrated systems. However, existing BAT meta-devices still depend on structural properties and the arrangement of meta-atoms, limiting the number of manipulated channels, operating frequency, and polarization combinations. Herein, a universal BAT meta-device, enabling bidirectional eight-phase-channel asymmetric transmission, composed of bilayer spatially cascaded birefringent metasurfaces (BMs) is proposed to allow for arbitrary polarization combination via the inverse design method and validated in the microwave region. In addition, the polarization multiplexing capabilities of BAT meta-devices are further extended via a Lego-like physical mechanism. The proposed design strategy may facilitate BAT meta-devices functional innovation and advanced application deployment in holographic images, duplex communication, and secret-key-sharing data encryption.
作为一种新兴的显示、加密和信息存储平台，双向非对称传输（BAT）元设备已引起广泛关注。一般来说，BAT 元设备的复用能力决定了多任务集成系统的负载能力上限。然而，现有的 BAT 元器件仍然依赖于元原子的结构特性和排列方式，从而限制了可操作通道的数量、工作频率和偏振组合。本文提出了一种通用的 BAT 元器件，由双层空间级联双折射元表面（BM）组成，可实现双向八相信道非对称传输，通过逆设计方法实现任意极化组合，并在微波区域进行了验证。此外，还通过类似乐高的物理机制进一步扩展了 BAT 元器件的极化复用能力。所提出的设计策略可促进 BAT 元器件在全息图像、双工通信和密钥共享数据加密方面的功能创新和高级应用部署。
{"title":"Full-Phase Parameter Modulation with Arbitrary Polarization Combination via Bidirectional Asymmetric Transmission Meta-Devices","authors":"Hongmei Li, Axiang Yu, Cheng Pang, Yuzhong Wang, Jiaran Qi","doi":"10.1002/lpor.202400300","DOIUrl":"https://doi.org/10.1002/lpor.202400300","url":null,"abstract":"The bidirectional asymmetric transmission (BAT) meta-devices have attracted widespread attention as an emerging display, encryption, and information storage platform. Generally, the multiplexing capability of BAT meta-devices determines the upper limit of the loading capacity of multi-task integrated systems. However, existing BAT meta-devices still depend on structural properties and the arrangement of meta-atoms, limiting the number of manipulated channels, operating frequency, and polarization combinations. Herein, a universal BAT meta-device, enabling bidirectional eight-phase-channel asymmetric transmission, composed of bilayer spatially cascaded birefringent metasurfaces (BMs) is proposed to allow for arbitrary polarization combination via the inverse design method and validated in the microwave region. In addition, the polarization multiplexing capabilities of BAT meta-devices are further extended via a Lego-like physical mechanism. The proposed design strategy may facilitate BAT meta-devices functional innovation and advanced application deployment in holographic images, duplex communication, and secret-key-sharing data encryption.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141463694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kyungnam Kang, Inseop Byeon, Young Gu Kim, Jong Choi, Donghyun Kim
Organic light‐emitting diodes (OLEDs) in recent years have emerged as a leading display technology and the popularity of OLEDs is attributed to their numerous advantages, including the ability to produce natural color, achieve a true black state, consume low consumption, exhibit fast response, and be compatible with flexible devices. However, limitations in the performance persist, e.g., the out‐coupling efficiency, which currently stands at ≈20% due to issues such as trapped modes and plasmon loss. Many researchers, therefore, have actively proposed the integration of various nanostructures to address the challenges and enhance OLED performance. The structures play a crucial role in facilitating strong optical interaction with surface plasmon and waveguide modes, thereby improving the extraction of trapped modes. To mitigate the confinement, layers to modulate the refractive index are introduced to extract the confined light and redirect it into the out‐coupled mode. In this review, a comprehensive overview of the principle and effectiveness of these nanostructures in enhancing OLED performance is provided. Various applications of OLEDs are explored based on nanostructures such as nanoparticles, nanomeshes, metasurface, bioinspired structures, and scattering layers. By implementing and refining these nanostructures, significant advancements in OLED performance are anticipated.
{"title":"Nanostructures in Organic Light‐Emitting Diodes: Principles and Recent Advances in the Light Extraction Strategy","authors":"Kyungnam Kang, Inseop Byeon, Young Gu Kim, Jong Choi, Donghyun Kim","doi":"10.1002/lpor.202400547","DOIUrl":"https://doi.org/10.1002/lpor.202400547","url":null,"abstract":"Organic light‐emitting diodes (OLEDs) in recent years have emerged as a leading display technology and the popularity of OLEDs is attributed to their numerous advantages, including the ability to produce natural color, achieve a true black state, consume low consumption, exhibit fast response, and be compatible with flexible devices. However, limitations in the performance persist, e.g., the out‐coupling efficiency, which currently stands at ≈20% due to issues such as trapped modes and plasmon loss. Many researchers, therefore, have actively proposed the integration of various nanostructures to address the challenges and enhance OLED performance. The structures play a crucial role in facilitating strong optical interaction with surface plasmon and waveguide modes, thereby improving the extraction of trapped modes. To mitigate the confinement, layers to modulate the refractive index are introduced to extract the confined light and redirect it into the out‐coupled mode. In this review, a comprehensive overview of the principle and effectiveness of these nanostructures in enhancing OLED performance is provided. Various applications of OLEDs are explored based on nanostructures such as nanoparticles, nanomeshes, metasurface, bioinspired structures, and scattering layers. By implementing and refining these nanostructures, significant advancements in OLED performance are anticipated.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141462792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The underlying mechanism of broadband dispersive‐wave emission within a resonance band of gas‐filled anti‐resonant hollow‐core fiber is studied. Both numerical and experimental results unveiled that the pump pulse with a soliton order of ≈3, launched into the hollow‐core fiber, experienced two stages of pulse compression, resulting in a multi‐peak structure of the emitted dispersive‐wave spectrum. Over the first‐stage pulse compression, a sharp increase of the pulse peak power triggers the first time of dispersive‐wave emission, and simultaneously causes the soliton frequency blue‐shift due to soliton‐plasma interactions. As the central frequency of the blue‐shifting soliton approaches to a resonance band of the hollow‐core fiber, it experiences a fast‐decreasing dispersion value in the fiber waveguide, resulting in the second stage of pulse compression. The second‐stage pulse compression triggers the second time of dispersive‐wave emission with a phase‐matched frequency slightly lower than that at the first stage. Multi‐peak spectra of the output dispersive‐waves and their formation dynamics can be understood using a delicate and unique coupling mechanism among three nonlinear effects including multi‐stage soliton compression, soliton‐plasma interaction, and phase‐matched dispersive‐wave emission. The output broadband dispersive‐wave, exhibiting good coherence and stability, can be potentially compressed to sub‐30 fs duration using a precise chirp‐compensation technique.
{"title":"Broadband Dispersive‐Wave Emission Coupled with Two‐Stage Soliton Self‐Compression in Gas‐Filled Anti‐Resonant Hollow‐Core Fibers","authors":"Jinyu Pan, Zhiyuan Huang, Yifei Chen, Zhuozhao Luo, Fei Yu, Dakun Wu, Tiandao Chen, Donghan Liu, Yue Yu, Wenbin He, Xin Jiang, Meng Pang, Yuxin Leng, Ruxin Li","doi":"10.1002/lpor.202400531","DOIUrl":"https://doi.org/10.1002/lpor.202400531","url":null,"abstract":"The underlying mechanism of broadband dispersive‐wave emission within a resonance band of gas‐filled anti‐resonant hollow‐core fiber is studied. Both numerical and experimental results unveiled that the pump pulse with a soliton order of ≈3, launched into the hollow‐core fiber, experienced two stages of pulse compression, resulting in a multi‐peak structure of the emitted dispersive‐wave spectrum. Over the first‐stage pulse compression, a sharp increase of the pulse peak power triggers the first time of dispersive‐wave emission, and simultaneously causes the soliton frequency blue‐shift due to soliton‐plasma interactions. As the central frequency of the blue‐shifting soliton approaches to a resonance band of the hollow‐core fiber, it experiences a fast‐decreasing dispersion value in the fiber waveguide, resulting in the second stage of pulse compression. The second‐stage pulse compression triggers the second time of dispersive‐wave emission with a phase‐matched frequency slightly lower than that at the first stage. Multi‐peak spectra of the output dispersive‐waves and their formation dynamics can be understood using a delicate and unique coupling mechanism among three nonlinear effects including multi‐stage soliton compression, soliton‐plasma interaction, and phase‐matched dispersive‐wave emission. The output broadband dispersive‐wave, exhibiting good coherence and stability, can be potentially compressed to sub‐30 fs duration using a precise chirp‐compensation technique.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141462866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Series of Ce3+‐activated Sr4La6(SiO4)6Cl2 (SLSOC) cyan‐emitting phosphors are designed to satisfy the demands of plant growth and full‐spectrum white‐light diode (white‐LED). Herein, to modify the luminescence behaviors of phosphors, Ce3+ is designed to occupy the different sites in SLSOC host lattices. Excited at 353 nm, the resultant phosphors emit glaring cyan emission originating from Ce3+ with an asymmetric emission band, which is assigned to the two‐site occupation of Ce3+ at Sr2+ or La3+ crystallographic sites. Moreover, the quantum efficiency and thermal quenching performances of synthesized phosphors are also analyzed, which are all dependent on the crystallographic sites taken by Ce3+. Via using the designed phosphors, two cyan‐emitting LEDs are packaged and their emissions are highly overlapped with the absorption spectra of plant pigments, which allow their feasibilities in plant growth. Furthermore, the artificial plant growth experiments are performed to clarify the significant positive influence of the packaged cyan‐emitting LEDs on plant growth. Additionally, via using the prepared cyan‐emitting phosphors to compensate the cyan gap, the full‐spectrum white‐LEDs with high electroluminescence performances are designed. These achievements reveal that the Ce3+‐activated SLSOC phosphors with controllable luminescence properties are promising cyan‐emitting converters for artificial plant growth LED and full‐spectrum white‐LED.
{"title":"Site Substitution Toward Modified Spectral Behaviors in Ce3+‐Activated Sr4La6(SiO4)6Cl2 Cyan‐Emitting Phosphors for Plant Growth and Full‐Spectrum White Light‐Emitting Diode","authors":"Yaojin Guo, Yonghao Wang, Yuwen Lu, Laihui Luo, Weiping Li, Peng Du","doi":"10.1002/lpor.202400183","DOIUrl":"https://doi.org/10.1002/lpor.202400183","url":null,"abstract":"Series of Ce<jats:sup>3+</jats:sup>‐activated Sr<jats:sub>4</jats:sub>La<jats:sub>6</jats:sub>(SiO<jats:sub>4</jats:sub>)<jats:sub>6</jats:sub>Cl<jats:sub>2</jats:sub> (SLSOC) cyan‐emitting phosphors are designed to satisfy the demands of plant growth and full‐spectrum white‐light diode (white‐LED). Herein, to modify the luminescence behaviors of phosphors, Ce<jats:sup>3+</jats:sup> is designed to occupy the different sites in SLSOC host lattices. Excited at 353 nm, the resultant phosphors emit glaring cyan emission originating from Ce<jats:sup>3+</jats:sup> with an asymmetric emission band, which is assigned to the two‐site occupation of Ce<jats:sup>3+</jats:sup> at Sr<jats:sup>2+</jats:sup> or La<jats:sup>3+</jats:sup> crystallographic sites. Moreover, the quantum efficiency and thermal quenching performances of synthesized phosphors are also analyzed, which are all dependent on the crystallographic sites taken by Ce<jats:sup>3+</jats:sup>. Via using the designed phosphors, two cyan‐emitting LEDs are packaged and their emissions are highly overlapped with the absorption spectra of plant pigments, which allow their feasibilities in plant growth. Furthermore, the artificial plant growth experiments are performed to clarify the significant positive influence of the packaged cyan‐emitting LEDs on plant growth. Additionally, via using the prepared cyan‐emitting phosphors to compensate the cyan gap, the full‐spectrum white‐LEDs with high electroluminescence performances are designed. These achievements reveal that the Ce<jats:sup>3+</jats:sup>‐activated SLSOC phosphors with controllable luminescence properties are promising cyan‐emitting converters for artificial plant growth LED and full‐spectrum white‐LED.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":null,"pages":null},"PeriodicalIF":11.0,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141463037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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