Pub Date : 2025-02-01DOI: 10.1016/j.photonics.2025.101354
Zhensheng Wang , Yan Li , Haizhu Wang , Dengkui Wang , Jiao Wang , Minghui Lv , Lulu Gan , Shucun Zhao
In this paper, the InGaAs/GaAsP multiple quantum wells (MQWs) were successfully fabricated using metal-organic chemical vapor deposition (MOCVD) equipment, exhibiting the characteristics of a well-cluster composite (WCC) quantum structure. X-ray diffraction (XRD) tests indicated that the crystalline quality of the MQWs was high. Furthermore, photoluminescence (PL) tests revealed that the highly strained InGaAs/GaAsP quantum well structures could emit lasers simultaneously in the 950 nm and 1030 nm bands. This observation demonstrated that the double peaks observed in the quantum well photoluminescence were associated with indium-rich clusters (IRCs) generated by In-atom polarization, highlighting significant advantages for the development of new dual-wavelength lasers. This finding holds considerable importance for the advancement of novel monolithic quantum confined lasers that provide outputs in dual-wavelength and dual-polarization formats.
{"title":"Luminescence characterisation of composite quantum confinement structures of In0.29Ga0.71As well-cluster composite","authors":"Zhensheng Wang , Yan Li , Haizhu Wang , Dengkui Wang , Jiao Wang , Minghui Lv , Lulu Gan , Shucun Zhao","doi":"10.1016/j.photonics.2025.101354","DOIUrl":"10.1016/j.photonics.2025.101354","url":null,"abstract":"<div><div>In this paper, the InGaAs/GaAsP multiple quantum wells (MQWs) were successfully fabricated using metal-organic chemical vapor deposition (MOCVD) equipment, exhibiting the characteristics of a well-cluster composite (WCC) quantum structure. X-ray diffraction (XRD) tests indicated that the crystalline quality of the MQWs was high. Furthermore, photoluminescence (PL) tests revealed that the highly strained InGaAs/GaAsP quantum well structures could emit lasers simultaneously in the 950 nm and 1030 nm bands. This observation demonstrated that the double peaks observed in the quantum well photoluminescence were associated with indium-rich clusters (IRCs) generated by In-atom polarization, highlighting significant advantages for the development of new dual-wavelength lasers. This finding holds considerable importance for the advancement of novel monolithic quantum confined lasers that provide outputs in dual-wavelength and dual-polarization formats.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101354"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
A novel twin-core photonic crystal fiber (TC-PCF) sensor for alcohol detection has been introduced that specifically targets ethanol, propanol, butanol and pentanol. The sensor utilizes silica as a substrate material with circular air holes in the cladding region and operates between 2 µm and 3 µm range of wavelength. Simulations and evaluations are performed on COMSOL Multiphysics software interface. The twin core structure of this sensor contributes to its enhanced or high-precision sensitivity, and the TC-PCF is versatile, making it suitable for detecting four different types of alcohol. This sensor reveals exceptional wavelength sensitivities of 8383.168 nm/RIU, 13759.69 nm/RIU and 14554.26 nm/RIU for ethanol, propanol and butanol respectively for the fiber length of 1600 µm. The amplitude sensitivity for ethanol, propanol, and butanol are 2.95 RIU−1, 5.16 RIU−1 and 5.82 RIU−1 respectively, while the corresponding resolutions for ethanol, propanol and butanol are 119.2 × 10−7 RIU, 72.6 × 10−7 RIU and 68.7 × 10−7 RIU respectively. The figures of merit (FOM) are 29.50 RIU−1, 46.19 RIU−1 and 53.26 RIU−1 for ethanol, propanol and butanol respectively. The sensor offers high sensitivity, a compact design and ease of fabrication which offers significant advantages over traditional alcohol detection methods, making it highly suitable for future alcohol sensing applications.
{"title":"High-precision alcohol sensing using twin core photonic crystal fiber","authors":"Vikash Mourya , Sapana Yadav , Pooja Lohia , Adarsh Chandra Mishra , D.K. Dwivedi , Upendra Kulshrestha","doi":"10.1016/j.photonics.2024.101348","DOIUrl":"10.1016/j.photonics.2024.101348","url":null,"abstract":"<div><div>A novel twin-core photonic crystal fiber (TC-PCF) sensor for alcohol detection has been introduced that specifically targets ethanol, propanol, butanol and pentanol. The sensor utilizes silica as a substrate material with circular air holes in the cladding region and operates between 2 µm and 3 µm range of wavelength. Simulations and evaluations are performed on COMSOL Multiphysics software interface. The twin core structure of this sensor contributes to its enhanced or high-precision sensitivity, and the TC-PCF is versatile, making it suitable for detecting four different types of alcohol. This sensor reveals exceptional wavelength sensitivities of 8383.168 nm/RIU, 13759.69 nm/RIU and 14554.26 nm/RIU for ethanol, propanol and butanol respectively for the fiber length of 1600 µm. The amplitude sensitivity for ethanol, propanol, and butanol are 2.95 RIU<sup>−1</sup>, 5.16 RIU<sup>−1</sup> and 5.82 RIU<sup>−1</sup> respectively, while the corresponding resolutions for ethanol, propanol and butanol are 119.2 × 10<sup>−7</sup> RIU, 72.6 × 10<sup>−7</sup> RIU and 68.7 × 10<sup>−7</sup> RIU respectively. The figures of merit (FOM) are 29.50 RIU<sup>−1</sup>, 46.19 RIU<sup>−1</sup> and 53.26 RIU<sup>−1</sup> for ethanol, propanol and butanol respectively. The sensor offers high sensitivity, a compact design and ease of fabrication which offers significant advantages over traditional alcohol detection methods, making it highly suitable for future alcohol sensing applications.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101348"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2025-02-01DOI: 10.1016/j.photonics.2025.101353
Yuhan Ge , Zexu Liu , Xueyao Song , Jicheng Wang
The all-dielectric phase metasurface due to their low-loss characteristics can be used for efficient wavefront control in the optical visible range. In this paper, we construct and design an improved diatomic structure metasurface by using the joint regulation of geometric phase and propagation phase. Compared with single atomic structures, we introduce new degrees of freedom to flexibly and effectively control the phase and amplitude of the optical wavefront. We can joint geometric phase or propagation phase to arrange two kinds of supramolecular structures to sophisticatedly realize multifunctional modulations of on/off imaging distributions in the near field and different image displays in the far field. We believe that our research results can provide reference for multifunctional optical surfaces, dynamic optical control and optical information encryption.
{"title":"Multifunctional light field modulations of composite- phase-based diatomic metasurfaces","authors":"Yuhan Ge , Zexu Liu , Xueyao Song , Jicheng Wang","doi":"10.1016/j.photonics.2025.101353","DOIUrl":"10.1016/j.photonics.2025.101353","url":null,"abstract":"<div><div>The all-dielectric phase metasurface due to their low-loss characteristics can be used for efficient wavefront control in the optical visible range. In this paper, we construct and design an improved diatomic structure metasurface by using the joint regulation of geometric phase and propagation phase. Compared with single atomic structures, we introduce new degrees of freedom to flexibly and effectively control the phase and amplitude of the optical wavefront. We can joint geometric phase or propagation phase to arrange two kinds of supramolecular structures to sophisticatedly realize multifunctional modulations of on/off imaging distributions in the near field and different image displays in the far field. We believe that our research results can provide reference for multifunctional optical surfaces, dynamic optical control and optical information encryption.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101353"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2025-02-01DOI: 10.1016/j.photonics.2025.101358
Harith Ahmad , Kirubhashni Loganathan , Norazriena Yusoff , Mohamad Zamani Zulkifli
This study investigates the influence of deposition methods on the laser performance of Erbium-doped fiber lasers (EDFL). Two deposition methods, namely the drop-casting and airbrush-sprayed techniques, were employed. The reduced graphene oxide/magnesium oxide (rGO/MgO) composite applied using drop-casting on arc-shaped fiber shows a higher modulation depth of 3.27 %, surpassing the 2.12 % achieved by the airbrush-sprayed version. Both composites' structures ensure high thermal stability, allowing for continuous operation for 5 hours without performance degradation. The generation of mode-locking in the EDFL occurred when the incident light interacted with the rGO/MgO composite through the evanescent wave, reaching the threshold pump power of 389.69 mW. Integrating the saturable absorber (SA) in the cavity and adjusting the polarization controller (PC) enables stable pulse generation with a pulse duration of 0.91 ps for drop-casted arc-shape fiber and 1.32 ps for sprayed arc-shape fiber with a fundamental frequency of 18.10 MHz. The difference in modulation depth and laser performance is due to the condensed deposition achieved using drop-casting, resulting in improved interaction between light and matter and better saturable absorption properties. The results of this research provide a compelling alternative for ultrafast fiber lasers that are both compact and efficient, and they have the potential to be utilized in high-speed optical communication as well as medicinal imaging technologies.
{"title":"Studying the influence of deposition methods on ultrashort pulse generation","authors":"Harith Ahmad , Kirubhashni Loganathan , Norazriena Yusoff , Mohamad Zamani Zulkifli","doi":"10.1016/j.photonics.2025.101358","DOIUrl":"10.1016/j.photonics.2025.101358","url":null,"abstract":"<div><div>This study investigates the influence of deposition methods on the laser performance of Erbium-doped fiber lasers (EDFL). Two deposition methods, namely the drop-casting and airbrush-sprayed techniques, were employed. The reduced graphene oxide/magnesium oxide (rGO/MgO) composite applied using drop-casting on arc-shaped fiber shows a higher modulation depth of 3.27 %, surpassing the 2.12 % achieved by the airbrush-sprayed version. Both composites' structures ensure high thermal stability, allowing for continuous operation for 5 hours without performance degradation. The generation of mode-locking in the EDFL occurred when the incident light interacted with the rGO/MgO composite through the evanescent wave, reaching the threshold pump power of 389.69 mW. Integrating the saturable absorber (SA) in the cavity and adjusting the polarization controller (PC) enables stable pulse generation with a pulse duration of 0.91 ps for drop-casted arc-shape fiber and 1.32 ps for sprayed arc-shape fiber with a fundamental frequency of 18.10 MHz. The difference in modulation depth and laser performance is due to the condensed deposition achieved using drop-casting, resulting in improved interaction between light and matter and better saturable absorption properties. The results of this research provide a compelling alternative for ultrafast fiber lasers that are both compact and efficient, and they have the potential to be utilized in high-speed optical communication as well as medicinal imaging technologies.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101358"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2025-02-01DOI: 10.1016/j.photonics.2024.101349
Youngsoo Kim, Seung Hyeon Hong, Seokhyeon Hong, Soon-Hong Kwon
To meet the increasing demand for wavelength scaled light-emitting devices, this study developed a novel dielectric nanowire configuration comprising two distinct metals. This structure is expected to function as a unidirectional light source owing to the reflection occurring at the junctions of the two metals. The performance of this structure as a unidirectional nanosized light source was validated using finite-difference time-domain (FDTD) simulations. With a minimal waveguide width of w = 115 nm, this structure mitigates the risks associated with free-space radiation and interference from other wavelength modes. The subwavelength-sized surface plasmon polariton waveguide caused substantial field concentration, resulting in a spontaneous emission enhancement rate approximately 50 times higher than that of the bulk material. The exceptional characteristics and significantly elevated spontaneous emission enhancement rate of the proposed structure suggest its potential as a single-photon light source.
{"title":"Bimetal-wrapped nanowire structure for improved efficiency and unidirectional emission of single-photon sources","authors":"Youngsoo Kim, Seung Hyeon Hong, Seokhyeon Hong, Soon-Hong Kwon","doi":"10.1016/j.photonics.2024.101349","DOIUrl":"10.1016/j.photonics.2024.101349","url":null,"abstract":"<div><div>To meet the increasing demand for wavelength scaled light-emitting devices, this study developed a novel dielectric nanowire configuration comprising two distinct metals. This structure is expected to function as a unidirectional light source owing to the reflection occurring at the junctions of the two metals. The performance of this structure as a unidirectional nanosized light source was validated using finite-difference time-domain (FDTD) simulations. With a minimal waveguide width of w = 115 nm, this structure mitigates the risks associated with free-space radiation and interference from other wavelength modes. The subwavelength-sized surface plasmon polariton waveguide caused substantial field concentration, resulting in a spontaneous emission enhancement rate approximately 50 times higher than that of the bulk material. The exceptional characteristics and significantly elevated spontaneous emission enhancement rate of the proposed structure suggest its potential as a single-photon light source.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101349"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2025-02-01DOI: 10.1016/j.photonics.2024.101346
Jianhao Shen, Swapnajit Chakravarty
We experimentally demonstrate an array of bus-coupled compact one-dimensional photonic crystal nanocavities with large extinction, high-quality factor, and large free spectral range (FSR) exceeding 300 nm centered on the telecom wavelength at 1550 nm. We present designs for an oxide-clad bus-coupled PC switch with 0.96 dB insertion loss, 4.33 dB extinction, and ∼260 aJ/bit switching energy by careful control of the cavity geometry as well as p-n junction doping. We also demonstrate that air-clad bus-coupled PC switches can operate with 1 dB insertion loss, 3 dB extinction, and ∼80 aJ/bit switching energy. We present a design route integrating phase change materials that can undergo a controlled transition between amorphous to crystalline material phases of the PCMs for a large change in refractive index. The large index change can overcome fabrication imperfections to effectively align the PC nanocavity resonance to the source laser wavelength thereby enabling true atto-joule per bit operation without the need for active power-consuming thermal heaters.
{"title":"Design of a compact atto-joule-per-bit bus-coupled photonic nanocavity switch","authors":"Jianhao Shen, Swapnajit Chakravarty","doi":"10.1016/j.photonics.2024.101346","DOIUrl":"10.1016/j.photonics.2024.101346","url":null,"abstract":"<div><div>We experimentally demonstrate an array of bus-coupled compact one-dimensional photonic crystal nanocavities with large extinction, high-quality factor, and large free spectral range (FSR) exceeding 300 nm centered on the telecom wavelength at 1550 nm. We present designs for an oxide-clad bus-coupled PC switch with 0.96 dB insertion loss, 4.33 dB extinction, and ∼260 aJ/bit switching energy by careful control of the cavity geometry as well as p-n junction doping. We also demonstrate that air-clad bus-coupled PC switches can operate with 1 dB insertion loss, 3 dB extinction, and ∼80 aJ/bit switching energy. We present a design route integrating phase change materials that can undergo a controlled transition between amorphous to crystalline material phases of the PCMs for a large change in refractive index. The large index change can overcome fabrication imperfections to effectively align the PC nanocavity resonance to the source laser wavelength thereby enabling true atto-joule per bit operation without the need for active power-consuming thermal heaters.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101346"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2025-02-01DOI: 10.1016/j.photonics.2024.101343
Mykola Khobzei , Vladyslav Tkach , Dmytro Vovchuk , Anna Mikhailovskaya , Serhii Haliuk , Andrii Samila , Jurgis Porins , Toms Salgals , Vjaceslavs Bobrovs , Pavel Ginzburg
Temporal degrees of freedom open new capabilities to control electromagnetic interactions with structured media. While rapid changes in effective material susceptibilities, comparable to the carrier oscillation period, suggest emerging new peculiar phenomena, experimental realizations lag theoretical predictions. However, effects inspired by slow, practically realizable parametric changes in effective media possess both fundamental interest and immediate practical applications. Here we perform comprehensive studies of modal hierarchy in a deformable Fabry-Perot resonator, constructed from a wire array, embedded in a compressible dielectric host. The lattice parameter of the wire media can be adjusted within a 3-fold range (from 10 to 30 mm), resulting in extraordinary electromagnetic tunability. Furthermore, the resonator response demonstrates an extreme sensitivity to mechanical deformation as resonance hierarchy in metamaterial assembly strongly depends on the lattice constant. Specifically, a 0.3 mm change in the lattice constant, being as small as ∼0.002λ, shifts the Fabry-Perot resonance frequency range by 1.7–1.8 GHz. Due to their exceptional responsiveness, deformable electromagnetic metamaterials can function as adaptive components, enabling new types of wireless communications where the frequency, bandwidth, and signal direction can be dynamically adjusted in real-time to accommodate varying environmental conditions and user demands.
{"title":"Deformable time-modulated wire media resonators","authors":"Mykola Khobzei , Vladyslav Tkach , Dmytro Vovchuk , Anna Mikhailovskaya , Serhii Haliuk , Andrii Samila , Jurgis Porins , Toms Salgals , Vjaceslavs Bobrovs , Pavel Ginzburg","doi":"10.1016/j.photonics.2024.101343","DOIUrl":"10.1016/j.photonics.2024.101343","url":null,"abstract":"<div><div>Temporal degrees of freedom open new capabilities to control electromagnetic interactions with structured media. While rapid changes in effective material susceptibilities, comparable to the carrier oscillation period, suggest emerging new peculiar phenomena, experimental realizations lag theoretical predictions. However, effects inspired by slow, practically realizable parametric changes in effective media possess both fundamental interest and immediate practical applications. Here we perform comprehensive studies of modal hierarchy in a deformable Fabry-Perot resonator, constructed from a wire array, embedded in a compressible dielectric host. The lattice parameter of the wire media can be adjusted within a 3-fold range (from 10 to 30 mm), resulting in extraordinary electromagnetic tunability. Furthermore, the resonator response demonstrates an extreme sensitivity to mechanical deformation as resonance hierarchy in metamaterial assembly strongly depends on the lattice constant. Specifically, a 0.3 mm change in the lattice constant, being as small as ∼0.002<em>λ</em>, shifts the Fabry-Perot resonance frequency range by 1.7–1.8 GHz. Due to their exceptional responsiveness, deformable electromagnetic metamaterials can function as adaptive components, enabling new types of wireless communications where the frequency, bandwidth, and signal direction can be dynamically adjusted in real-time to accommodate varying environmental conditions and user demands.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101343"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 realization of colorful effects based on inorganic electrochromic materials has always been a focus of research in the field of electrochromism. In recent years, colorful electrochromic devices based on Fabry-Perot cavity have received a lot of attention. This article uses three metals (chromium, copper and tungsten) and tungsten trioxide to form Fabry-Perot cavity, and tests these electrochromic devices (ECDs). The results show that Fabry-Perot cavity electrochromic devices based on these three metals can achieve colorful effects, among which ECD using tungsten as reflector has the best performance, with an optical modulation range of reflectivity of 27.67 %. The CIE color coordinates change from (0.235, 0.300) to (0.241, 0.181), and the response times for coloring and bleaching are 4.0 s and 6.1 s, respectively. ECD using chromium as reflector is similar to ECD using tungsten as reflector in reflectance spectra, ECD using copper as reflector has a fast response speed but performs poorly in terms of cycle life. By comparing the differences in device performance caused by three types of metal reflective layers, we believe that metals with strong reflection, good conductivity, and chemical stability can perform better in such electrochromic device.
{"title":"Fabry-Perot cavity colorful reflective electrochromic device based on metal and tungsten trioxide","authors":"Chenxiao Guo, Muyun Li, Honglong Ning, Guoping Su, Zhihao Liang, Bocheng Jiang, Yuxiang Liu, Shitao Xu, Rihui Yao, Junbiao Peng","doi":"10.1016/j.photonics.2025.101352","DOIUrl":"10.1016/j.photonics.2025.101352","url":null,"abstract":"<div><div>The realization of colorful effects based on inorganic electrochromic materials has always been a focus of research in the field of electrochromism. In recent years, colorful electrochromic devices based on Fabry-Perot cavity have received a lot of attention. This article uses three metals (chromium, copper and tungsten) and tungsten trioxide to form Fabry-Perot cavity, and tests these electrochromic devices (ECDs). The results show that Fabry-Perot cavity electrochromic devices based on these three metals can achieve colorful effects, among which ECD using tungsten as reflector has the best performance, with an optical modulation range of reflectivity of 27.67 %. The CIE color coordinates change from (0.235, 0.300) to (0.241, 0.181), and the response times for coloring and bleaching are 4.0 s and 6.1 s, respectively. ECD using chromium as reflector is similar to ECD using tungsten as reflector in reflectance spectra, ECD using copper as reflector has a fast response speed but performs poorly in terms of cycle life. By comparing the differences in device performance caused by three types of metal reflective layers, we believe that metals with strong reflection, good conductivity, and chemical stability can perform better in such electrochromic device.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101352"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2025-02-01DOI: 10.1016/j.photonics.2025.101355
Oscar D.H. Pardo , R.R. Rey-González
The design and development of new photonic devices for technological applications require a deep understanding of the effects of structural properties on the resulting band gap size and its position. In this study, we perform a theoretical analysis of the behavior of photonic band gap sizes, positions, and percentages under variations of the parameters characterizing binary (two materials), ternary (three materials), and linear continuum dielectric function multilayer structures. The resulting band gap atlas shows that binary systems may suffice for most applications, but ternary systems can provide additional design flexibility if needed. Linear continuum dielectric function systems exhibit a regular pattern for all gaps studied, and this regularity is reproduced with only a few materials involved. The positions of the gaps demonstrate a very monotonous behavior across all calculations performed. Finally, we propose additional extensions of formulas commonly used in the design of Bragg mirrors/reflectors using binary materials, discussing their corresponding limitations. These results can be seen as a technological horizon for the development of photonic devices.
{"title":"Photonic band gap atlas, formula extension, and design applications in 1D photonic crystals","authors":"Oscar D.H. Pardo , R.R. Rey-González","doi":"10.1016/j.photonics.2025.101355","DOIUrl":"10.1016/j.photonics.2025.101355","url":null,"abstract":"<div><div>The design and development of new photonic devices for technological applications require a deep understanding of the effects of structural properties on the resulting band gap size and its position. In this study, we perform a theoretical analysis of the behavior of photonic band gap sizes, positions, and percentages under variations of the parameters characterizing binary (two materials), ternary (three materials), and linear continuum dielectric function multilayer structures. The resulting band gap atlas shows that binary systems may suffice for most applications, but ternary systems can provide additional design flexibility if needed. Linear continuum dielectric function systems exhibit a regular pattern for all gaps studied, and this regularity is reproduced with only a few materials involved. The positions of the gaps demonstrate a very monotonous behavior across all calculations performed. Finally, we propose additional extensions of formulas commonly used in the design of Bragg mirrors/reflectors using binary materials, discussing their corresponding limitations. These results can be seen as a technological horizon for the development of photonic devices.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101355"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
This research proposes a novel design approach, including introducing a perforation inside the Tamm plasmon structure on the optical fiber tip. First, the proposed structure's reflection spectrum and an assessment of its sensitivity to variations in the refractive index of the surrounding environment were investigated. Subsequently, an examination was conducted to assess the impact of other structural characteristics on the sensor's sensitivity. The simulation results demonstrated that the structure exhibits suitable sensitivity to the refractive index of the surrounding environment.
{"title":"Refractive index measurement using Tamm plasmon resonance on fiber tip","authors":"Soodabeh Nouri Jouybari, Mahdi Gholipour Asl, Seyed Majid Mousavi","doi":"10.1016/j.photonics.2024.101340","DOIUrl":"10.1016/j.photonics.2024.101340","url":null,"abstract":"<div><div>This research proposes a novel design approach, including introducing a perforation inside the Tamm plasmon structure on the optical fiber tip. First, the proposed structure's reflection spectrum and an assessment of its sensitivity to variations in the refractive index of the surrounding environment were investigated. Subsequently, an examination was conducted to assess the impact of other structural characteristics on the sensor's sensitivity. The simulation results demonstrated that the structure exhibits suitable sensitivity to the refractive index of the surrounding environment.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"63 ","pages":"Article 101340"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143167891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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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