Pub Date : 2024-07-08DOI: 10.1088/2040-8986/ad6010
Yisheng Lei, Trevor Kling, Mahdi Hosseini
We investigate the optical lifetime, decay characteristics, spectral linewidth and energy level properties of thulium ions doped in a KY(WO$_{text{4}}$)$_{text{2}}$ crystal at 4K temperature. High doping concentration of thulium ions with inhomogeneous broadening allow us to study nonradiative behaviors, instantaneous spectral diffusion, and spectral power broadening in this solid-state material. The theoretical consideration of ion-ion interactions is shown to accurately characterize the absorption, decay and other spectral behaviors of Tm$^{text{3+}}$ ions. We observe more than ten-fold reduction in the decay time of $^3$H$_4$ state and about three-fold reduction in the spectral-hole lifetime as we approach the center of the inhomogeneous broadening, corresponding to higher optical densities.
{"title":"Optical characterizations of densely doped Tm$^{3+}$: KYW crystals at low temperatures","authors":"Yisheng Lei, Trevor Kling, Mahdi Hosseini","doi":"10.1088/2040-8986/ad6010","DOIUrl":"https://doi.org/10.1088/2040-8986/ad6010","url":null,"abstract":"\u0000 We investigate the optical lifetime, decay characteristics, spectral linewidth and energy level properties of thulium ions doped in a KY(WO$_{text{4}}$)$_{text{2}}$ crystal at 4K temperature. High doping concentration of thulium ions with inhomogeneous broadening allow us to study nonradiative behaviors, instantaneous spectral diffusion, and spectral power broadening in this solid-state material. The theoretical consideration of ion-ion interactions is shown to accurately characterize the absorption, decay and other spectral behaviors of Tm$^{text{3+}}$ ions. We observe more than ten-fold reduction in the decay time of $^3$H$_4$ state and about three-fold reduction in the spectral-hole lifetime as we approach the center of the inhomogeneous broadening, corresponding to higher optical densities.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"124 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141667829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-08DOI: 10.1088/2040-8986/ad600f
Jiaxi Sun, Jinhua Hu, Lei Li, Jijun Zhao
We propose a double-layer high-contrast metagrating structure with robust high-quality (Q) and temperature self-compensation for four-band refractive index sensing. The structure supports four-band symmetry-protected bound states in the continuum (SP-BICs) that transform into quasi-BICs as a result of structural symmetry breaking. However, the Q-factor of these quasi-BICs are limited by perturbation parameters, hampering practical fabrication. Interestingly, tuning the cavity length, we implement four-band Fabry–Pérot bound states in the continuum (FP-BICs) to transform the resonance mode back into high-Q quasi-BICs even at large perturbations. This approach is conducive to improving robustness and modulation freedom of Q-factors. In addition, we achieve temperature self-compensation by using the double-layer high-contrast metagrating consists of two materials with opposite thermo-optic (TO) dispersions. The simulation results indicate that the largest refractive index sensitivity is 470.9 nm/RIU, its figure of merit is 427818.2, and its Q-factor up to 9.3×105. The proposed double-layer high-contrast metagrating has potential application prospects for multiplex and high-performance sensing.
{"title":"Robust high-Q quasi-BICs in double-layer high-contrast metagrating with temperature self-compensation for refractive index sensing","authors":"Jiaxi Sun, Jinhua Hu, Lei Li, Jijun Zhao","doi":"10.1088/2040-8986/ad600f","DOIUrl":"https://doi.org/10.1088/2040-8986/ad600f","url":null,"abstract":"\u0000 We propose a double-layer high-contrast metagrating structure with robust high-quality (Q) and temperature self-compensation for four-band refractive index sensing. The structure supports four-band symmetry-protected bound states in the continuum (SP-BICs) that transform into quasi-BICs as a result of structural symmetry breaking. However, the Q-factor of these quasi-BICs are limited by perturbation parameters, hampering practical fabrication. Interestingly, tuning the cavity length, we implement four-band Fabry–Pérot bound states in the continuum (FP-BICs) to transform the resonance mode back into high-Q quasi-BICs even at large perturbations. This approach is conducive to improving robustness and modulation freedom of Q-factors. In addition, we achieve temperature self-compensation by using the double-layer high-contrast metagrating consists of two materials with opposite thermo-optic (TO) dispersions. The simulation results indicate that the largest refractive index sensitivity is 470.9 nm/RIU, its figure of merit is 427818.2, and its Q-factor up to 9.3×105. The proposed double-layer high-contrast metagrating has potential application prospects for multiplex and high-performance sensing.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":" 1195","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141668915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-08DOI: 10.1007/s12596-024-02014-6
Zhimin He, Jiayi Zhu, Cheng Huang, Jun Zeng, Fuchang Chen, Chaoqun Yu, Yan Li, Huichuan Lin, Huanting Chen, Yongtao Zhang, Jixiong Pu
{"title":"Application of visible light polarization imaging in normal temperature measurement","authors":"Zhimin He, Jiayi Zhu, Cheng Huang, Jun Zeng, Fuchang Chen, Chaoqun Yu, Yan Li, Huichuan Lin, Huanting Chen, Yongtao Zhang, Jixiong Pu","doi":"10.1007/s12596-024-02014-6","DOIUrl":"https://doi.org/10.1007/s12596-024-02014-6","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"120 48","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-06DOI: 10.1007/s12596-024-01993-w
P. B. Prathap, H. L. Prakruthi, K. Saara
{"title":"SiO2-Au-GO Based 2D Photonic Crystal Biosensor For Protein Analysis And iImmunological Evaluation","authors":"P. B. Prathap, H. L. Prakruthi, K. Saara","doi":"10.1007/s12596-024-01993-w","DOIUrl":"https://doi.org/10.1007/s12596-024-01993-w","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141671896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-05DOI: 10.1007/s12596-024-02002-w
Ryam Salam Abdulaali, R. K. Jamal
{"title":"Duffing–hologram technique in encryption information","authors":"Ryam Salam Abdulaali, R. K. Jamal","doi":"10.1007/s12596-024-02002-w","DOIUrl":"https://doi.org/10.1007/s12596-024-02002-w","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":" 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141676935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-05DOI: 10.1088/2040-8986/ad5f9f
Bapita Roy, Saikat Majumdar, Rajib Chakraborty
In this work, a nano-cavity based metal-insulator-metal (MIM) structure is proposed which can be used as a high-performance refractive index sensor. The analysis of its sensing capabilities is done by determining the transmission characteristics of light through the insulating air channel between the metal layer The loss in transmission in this channel is indicative of light leaking out of it and portion of it getting coupled to nano-cavities considered in the metal layers on both sides of air channel. The analyte, whose refractive index is to be sensed, is kept in these nano-cavities. The basic structure is modified by introducing graphene-oxide (GO) on the inner wall of the nano-cavity, which further improves the confinement of light in the nano-cavities. It is also shown that increasing the number of nano-cavity duos enhances the transmission loss through the waveguide and as a result the light energy confinement in the cavity increases. Calculated values of sensitivities and Figure of Merit (FOM) of the proposed sensor structure are much higher than similar works done previously. The uniqueness of the work is two-fold; namely use of graphene oxide as an inner layer of the nano-cavity improves the sensitivity of the sensor and secondly calculating the waveguide transmission to indirectly determine the confinement of light energy in nano-cavity simplifies the analysis of the performance of the proposed sensor. The structure is simple and can be easily fabricated using standard fabrication process.
{"title":"Graphene oxide based plasmonic nano-cavity sensor for high-performance refractive index sensing","authors":"Bapita Roy, Saikat Majumdar, Rajib Chakraborty","doi":"10.1088/2040-8986/ad5f9f","DOIUrl":"https://doi.org/10.1088/2040-8986/ad5f9f","url":null,"abstract":"\u0000 In this work, a nano-cavity based metal-insulator-metal (MIM) structure is proposed which can be used as a high-performance refractive index sensor. The analysis of its sensing capabilities is done by determining the transmission characteristics of light through the insulating air channel between the metal layer The loss in transmission in this channel is indicative of light leaking out of it and portion of it getting coupled to nano-cavities considered in the metal layers on both sides of air channel. The analyte, whose refractive index is to be sensed, is kept in these nano-cavities. The basic structure is modified by introducing graphene-oxide (GO) on the inner wall of the nano-cavity, which further improves the confinement of light in the nano-cavities. It is also shown that increasing the number of nano-cavity duos enhances the transmission loss through the waveguide and as a result the light energy confinement in the cavity increases. Calculated values of sensitivities and Figure of Merit (FOM) of the proposed sensor structure are much higher than similar works done previously. The uniqueness of the work is two-fold; namely use of graphene oxide as an inner layer of the nano-cavity improves the sensitivity of the sensor and secondly calculating the waveguide transmission to indirectly determine the confinement of light energy in nano-cavity simplifies the analysis of the performance of the proposed sensor. The structure is simple and can be easily fabricated using standard fabrication process.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":" 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141674853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-05DOI: 10.1088/2040-8986/ad5f9d
Hong Wang, Xiaoqian Wang, Chao Gao, Yu Wang, Zhuo Yu, Zhihai Yao
A multi-channel computational ghost imaging method based on multi-scale speckle optimization is proposed. We not only reduce imaging time and enhance imaging quality but also reduce interference among different channels. Using one bucket detector to receive total light intensity, the color speckle is formed by combining components obtained through the singular value decomposition of three self-designed multi-scale measurement matrices. Simulation and experimental results demonstrate that our designed method contributes to reducing imaging time and enhancing imaging quality, achieving improved visual quality even at low sampling rates. This approach enhances ghost imaging flexibility and holds potential for diverse applications, including target recognition and biomedical imaging.
{"title":"Multi-channel computational ghost imaging based on multi-scale speckle optimization","authors":"Hong Wang, Xiaoqian Wang, Chao Gao, Yu Wang, Zhuo Yu, Zhihai Yao","doi":"10.1088/2040-8986/ad5f9d","DOIUrl":"https://doi.org/10.1088/2040-8986/ad5f9d","url":null,"abstract":"\u0000 A multi-channel computational ghost imaging method based on multi-scale speckle optimization is proposed. We not only reduce imaging time and enhance imaging quality but also reduce interference among different channels. Using one bucket detector to receive total light intensity, the color speckle is formed by combining components obtained through the singular value decomposition of three self-designed multi-scale measurement matrices. Simulation and experimental results demonstrate that our designed method contributes to reducing imaging time and enhancing imaging quality, achieving improved visual quality even at low sampling rates. This approach enhances ghost imaging flexibility and holds potential for diverse applications, including target recognition and biomedical imaging.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":" 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141673716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In recent years, the concept of hyperbolic phonon polaritons (HPPs) has revolutionized the field of nanophotonic, enabling unprecedented control over light-matter interactions at the nanoscale. Here, we theoretically propose and study the lateral optical forces in twisted mixed-dimensional MoO3 homostructures. Assisted with the low-symmetry hyperbolic phonon polaritons, we realized a lateral optical force exerted on the Au nanoparticle near the surface of mixed-dimensional MoO3 homostructures with a linear polarized incident light. By controlling the polarization state, incident angle of light and the twisted angle of MoO3, the amplitude and direction of the lateral optical forces can be tailored in the mid-infrared range. Our findings provide a new platform for engineering lateral optical forces to manipulate diverse objects in a flexible and efficient manner.
{"title":"Configurable lateral optical forces from twisted mixed-dimensional MoO3 homostructures","authors":"Qizhi Yan, Runkun Chen, Peining Li, Xinliang Zhang","doi":"10.1088/2040-8986/ad5f9e","DOIUrl":"https://doi.org/10.1088/2040-8986/ad5f9e","url":null,"abstract":"\u0000 In recent years, the concept of hyperbolic phonon polaritons (HPPs) has revolutionized the field of nanophotonic, enabling unprecedented control over light-matter interactions at the nanoscale. Here, we theoretically propose and study the lateral optical forces in twisted mixed-dimensional MoO3 homostructures. Assisted with the low-symmetry hyperbolic phonon polaritons, we realized a lateral optical force exerted on the Au nanoparticle near the surface of mixed-dimensional MoO3 homostructures with a linear polarized incident light. By controlling the polarization state, incident angle of light and the twisted angle of MoO3, the amplitude and direction of the lateral optical forces can be tailored in the mid-infrared range. Our findings provide a new platform for engineering lateral optical forces to manipulate diverse objects in a flexible and efficient manner.","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":" 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141676925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-03DOI: 10.1007/s12596-024-01994-9
Dipankar Mall Gogoi, M. K. Hossain, T. D. Das, G. F. Toki, Sara H. Shahatha, M. R. Mohammad, Munirah D. Albaqami, Saikh Mohammad
{"title":"Numerical investigation and optimization of highly efficient and stable organic solar cells: OghmaNano (GPVDM) framework","authors":"Dipankar Mall Gogoi, M. K. Hossain, T. D. Das, G. F. Toki, Sara H. Shahatha, M. R. Mohammad, Munirah D. Albaqami, Saikh Mohammad","doi":"10.1007/s12596-024-01994-9","DOIUrl":"https://doi.org/10.1007/s12596-024-01994-9","url":null,"abstract":"","PeriodicalId":509797,"journal":{"name":"Journal of Optics","volume":"16 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141681558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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