Laser & Photonics Reviews最新文献_第4页

Multilevel Trap-Controlled Bright Mechanoluminescence of Sr/CaGa2S4: Eu2+ for Stress Sensing Applications

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-25 DOI: 10.1002/lpor.202500015

Yuhe Shao, Jianqing Chang, Hongzhen Liu, Zhen Song, Jun-Cheng Zhang, Quanlin Liu

{"title":"Multilevel Trap-Controlled Bright Mechanoluminescence of Sr/CaGa2S4: Eu2+ for Stress Sensing Applications","authors":"Yuhe Shao, Jianqing Chang, Hongzhen Liu, Zhen Song, Jun-Cheng Zhang, Quanlin Liu","doi":"10.1002/lpor.202500015","DOIUrl":"https://doi.org/10.1002/lpor.202500015","url":null,"abstract":"Brighter, recoverable, and more practical green mechanoluminescence (ML) materials are urgently required in diverse fields such as visual stress sensing and advanced display lighting. Ce3+/Eu2+ doping, leveraging efficient f-d transition, remains one of the most promising approaches for achieving high-performance green ML. However, intense competition between afterglow and ML necessitates precise control of trap depths to develop high-brightness and recoverable ML materials in Ce3+/Eu2+ doped trap-controlled systems. In this work, the concept of multilevel trap control is introduced into Eu2+-doped MGa2S4 (M = Sr, Ca) materials and, for the first time, elucidate the mechanism underlying irradiation-induced ML recovery in powdered MGa2S4: Eu2+ (M = Sr, Ca) materials dominated by shallow-level traps. By optimizing activator doping concentration, depth and distribution of multilevel traps are effectively fine-tuned, achieving remarkable ML peak intensity compared with renowned SrAl2O4 materials (~57.3% for SrAl2O4: Eu2+, Dy3+, and ~84.3% for (Sr, Ca)Al2O4: Eu2+, Dy3+) while minimizing afterglow interference. Finally, the practical application potential of SrGa2S4:Eu2+ is demonstrated by employing fluorescent coatings to visualize crack propagation and stress distribution in construction materials. This study explores broader potential applications of SrGa2S4: Eu2⁺ in ML technologies and offers novel insights and strategies for developing high-performance ML materials.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"5 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485733","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}

引用次数: 0

Active Terahertz Nonlocal Metasurfaces With Liquid Crystal Elastomers

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-25 DOI: 10.1002/lpor.202402167

Shangyan Long, Wei Zhang, Zhanqiang Xue, Guizhen Xu, Perry Ping Shum, Dan Luo, Longqing Cong

{"title":"Active Terahertz Nonlocal Metasurfaces With Liquid Crystal Elastomers","authors":"Shangyan Long, Wei Zhang, Zhanqiang Xue, Guizhen Xu, Perry Ping Shum, Dan Luo, Longqing Cong","doi":"10.1002/lpor.202402167","DOIUrl":"https://doi.org/10.1002/lpor.202402167","url":null,"abstract":"Achieving active tunability in metasurfaces remains a critical challenge, with conventional local metasurfaces limited by dispersive wavefront deflection and broad resonances that lack spectral selectivity. In contrast, nonlocal metasurfaces exhibit high selectivity, offering a promising platform for dynamic functionality. Here, an active nonlocal metasurface with exceptional spectral and spatial selectivity is experimentally demonstrated, leveraging the physics of bound states in the continuum and coupling phase. The metasurface achieves a deflected beam with a quality factor of 22 and a narrow beamwidth of 5°, focusing energy more precisely than local metasurfaces across both spectral and spatial domains. By integrating a liquid crystal elastomer substrate, tunable azimuthal deflection of 3° with 4.5% in-plane deformation is realized. Furthermore, the coupling phase introduces polarization-dependent in-plane wavevectors, enabling the spatial separation of orthogonal polarization components while maintaining high selectivity and tunability. This active nonlocal metasurface architecture shows strong potential for polarization-division multiplexing and demultiplexing with low cost and high environmental adaptation, paving the way for advanced terahertz devices, such as signal relays, processors, modulators, and transmitters, for next-generation wireless communications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"27 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485734","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}

引用次数: 0

Efficient and Stable 0D Cs3Cu2Br5:Mn Single Crystals for Low-Dose High-Resolution X-Ray Imaging

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-25 DOI: 10.1002/lpor.202402302

Yujie Wang, Xuemin Wen, Peng Ran, Chen Peng, Fan Yang, Yang (Michael) Yang, Yuntao Wu

{"title":"Efficient and Stable 0D Cs3Cu2Br5:Mn Single Crystals for Low-Dose High-Resolution X-Ray Imaging","authors":"Yujie Wang, Xuemin Wen, Peng Ran, Chen Peng, Fan Yang, Yang (Michael) Yang, Yuntao Wu","doi":"10.1002/lpor.202402302","DOIUrl":"https://doi.org/10.1002/lpor.202402302","url":null,"abstract":"Scintillators, essential component of radiation detectors, have garnered significant attention for their pivotal roles in homeland security, medical imaging, and nondestructive inspection applications. However, existing scintillators still face challenges in simultaneously achieving high scintillation efficiency, stability, and low toxicity. Herein, a novel Cs3Cu2Br5:Mn single crystal (SC) scintillator, utilizing nontoxic Mn2+ as activator, is developed. The introduction of Mn2⁺ into the 0D Cs3Cu2Br5 host induces a green emission with a high photoluminescence quantum yield of 92.9%. Compared to undoped Cs3Cu2Br5, the Mn2+-doped one exhibits a 120% increase in steady-state scintillation efficiency, reaching 14 000 photons MeV−1. Moreover, the X-ray low detection limit improves from 49.3 to 16.8 nGyair s−1. The Cs3Cu2Br5:Mn SC also achieves an ultra-high spatial resolution of 24 line pairs (lp) mm−1 when utilized as a flat scintillation screen. This study demonstrates a promising strategy to design high-performance scintillators by doping eco-friendly metal, offering new avenues for advancements in radiation detection technologies.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"49 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143485736","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}

引用次数: 0

Reconfigurable Glass Scintillation Screen for Conformal X-Ray Imaging of Shape-Changeable Objects

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-23 DOI: 10.1002/lpor.202500266

Jinke Jiang, Xingchu Mao, Xiaoxin Zheng, Xin Ye, Cuicui Li, Huimin Li, Chao Ge, Jiashuai Chen, Shuwen Wang, Leilei Zhang, Shuangyue Cui, Qinglian Lin, Qing Guo, Quanxiang Han, Yuhai Zhang, Xutang Tao, Yang Liu

{"title":"Reconfigurable Glass Scintillation Screen for Conformal X-Ray Imaging of Shape-Changeable Objects","authors":"Jinke Jiang, Xingchu Mao, Xiaoxin Zheng, Xin Ye, Cuicui Li, Huimin Li, Chao Ge, Jiashuai Chen, Shuwen Wang, Leilei Zhang, Shuangyue Cui, Qinglian Lin, Qing Guo, Quanxiang Han, Yuhai Zhang, Xutang Tao, Yang Liu","doi":"10.1002/lpor.202500266","DOIUrl":"https://doi.org/10.1002/lpor.202500266","url":null,"abstract":"As the kernel component of X-ray imaging systems, the mainstream flat-panel detectors suffer from image distortion and blurring when applied to irregular shaped objects, because of the non-conformal collocation between the detector and the object. Herein, by taking advantage of the robust glass-forming capability and versatile processability of (TPT)2MnBr4 (TPT = propyltriphenylphosphonium) scintillator, reconfigurable scintillation screen for conformal X-ray imaging is explored. Compared to the flexible polymer screens doped with micro-/nanoparticles, the melt-casted large-area (20 × 20 cm2) scintillation screens are homogeneous and immune to light scattering, thus manifesting optical transmittance of above 80% in the 525−800 nm range and high spatial resolution of 25.5 lp mm−1. More impressively, the screen can be reconfigured in shape near its glass transition temperature, realizing continuous conformance with irregular or changeable objects. Exemplified by conformal X-ray imaging of a flexed elbow joint and a flexible circuit with variational shapes, the reconfigurable screens demonstrate superiorities in both image clarity (15 lp mm−1 versus 3 lp mm−1 for the conformal imaging versus non-conformal imaging) and reduction of radiation dosage. That, plus the scalable fabrication process and cost-effective raw materials, will promise reconfigurable glass scintillation screens great potential in customized medical diagnostics and industrial inspection.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"25 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143477864","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}

引用次数: 0

Recent Progress in CsPbX3 (X = Cl, Br, and I) Perovskite Quantum Dot Glasses: Synthesis, Matrix Optimization, and Photonic Application Potentials

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-23 DOI: 10.1002/lpor.202402245

Yongmin Duan, Keyi Gu, Shugang Li, Juan Du, Junjie Zhang

{"title":"Recent Progress in CsPbX3 (X = Cl, Br, and I) Perovskite Quantum Dot Glasses: Synthesis, Matrix Optimization, and Photonic Application Potentials","authors":"Yongmin Duan, Keyi Gu, Shugang Li, Juan Du, Junjie Zhang","doi":"10.1002/lpor.202402245","DOIUrl":"https://doi.org/10.1002/lpor.202402245","url":null,"abstract":"Perovskite quantum dots (PQDs) have emerged as prominent candidates for a variety of optoelectronic applications, including solar cells, white light-emitting diodes (WLED), and liquid crystal displays (LCD), owing to their remarkable optical and electronic properties. These properties encompass high absorption coefficients, elevated quantum yields, tunable bandgaps, and narrow emission peaks. Nonetheless, PQDs are inherently unstable due to their low formation energy and ionic crystal nature, making them susceptible to degradation upon exposure to light, heat, and moisture. To address these challenges, encapsulating PQDs within an inorganic glass matrix has been proven effective. The rigid structure of the glass matrix significantly enhances the stability of PQDs while preserving their exceptional optical characteristics. This review provides an overview of recent advancements in PQD glasses and aims to offer critical insights to propel future research in this domain. The commonly employed glass matrix and preparation techniques for PQD glasses are reviewed, highlighting their fundamental properties such as structural integrity, optical performance, andstability, and discussing the approaches to improve the optical properties of PQD glasses, which include glass component regulation and PQD structure regulation. Additionally, the potential applications of PQD glasses in diverse areas, including WLED, LCD, and temperature sensing are explored.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"13 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473556","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}

引用次数: 0

Humidity-Assisted High-Resolution Laser Patterning of Perovskite Nanocrystals on Glass Beyond the Diffraction Limit

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-22 DOI: 10.1002/lpor.202402093

Zhiqiang Wang, Xinkuo Li, Chenduan Chen, Chao Ruan, Zengling Li, Renshuang Zhai, Ke Sun, Jianrong Qiu, Dezhi Tan

{"title":"Humidity-Assisted High-Resolution Laser Patterning of Perovskite Nanocrystals on Glass Beyond the Diffraction Limit","authors":"Zhiqiang Wang, Xinkuo Li, Chenduan Chen, Chao Ruan, Zengling Li, Renshuang Zhai, Ke Sun, Jianrong Qiu, Dezhi Tan","doi":"10.1002/lpor.202402093","DOIUrl":"https://doi.org/10.1002/lpor.202402093","url":null,"abstract":"Luminescent micro-patterns of perovskite nanocrystals in glass written by femtosecond laser offer a novel alternative for integrated optoelectronic applications such as μ-LED, image sensors, and optical communication. However, improving the resolution, specifically, reducing the sizes of pixel dots, of luminescent perovskite patterns directly processed by femtosecond laser in glass remains challenging due to the optical diffraction limit and the crystallographic nature of perovskites in glass. Herein, high-resolution luminescent patterning is reported (with diameters of luminescent dots down to nanometer scale, beyond the diffraction limit) of perovskite nanocrystals on glass surfaces assisted by humidity treatment. The generation of photoluminescence (PL) emission from laser-written non-luminescent dot patterns is recognized as originating from the H2O-promoted nanocrystallization of perovskites in the local region of pattern dots. By manipulating the humidity level or halide stoichiometry, arbitrary patterns with tunable emission colors can be fabricated. The current luminescent patterning strategy expanded practical applications in anti-counterfeiting, information encryption/decryption, and optical storage. This work provides a high-quality and versatile route toward high-resolution perovskite patterns, which would unlock more new applications in optics and optoelectronics.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"3 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143473552","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}

引用次数: 0

All-Dielectric Metawaveguide Ring Resonators with Deeply Sub-Diffractive Mode Volumes

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-21 DOI: 10.1002/lpor.202401579

Saddam Gafsi, Judson D. Ryckman

{"title":"All-Dielectric Metawaveguide Ring Resonators with Deeply Sub-Diffractive Mode Volumes","authors":"Saddam Gafsi, Judson D. Ryckman","doi":"10.1002/lpor.202401579","DOIUrl":"https://doi.org/10.1002/lpor.202401579","url":null,"abstract":"Whispering gallery mode (WGM) resonators provide an essential platform for various optical applications but are typically limited to mode volumes V ≈2πR(λ0/2n)2 where R is the bend radius and n is the refractive index. Here, the theory, simulation, and experimental realization of WGM resonators capable of achieving deeply sub-diffractive mode volumes are presented, V << 2πR(λ0/2n)2, while preserving high Q factors. Rather than relying on plasmonics to reduce the mode volume, the work relies on all-dielectric metamaterial waveguides that support localized field enhancements within the high index medium. Combined with the excitation of standing wave rather than traveling wave WGM resonances, it is shown how the mode volume of a silicon microring resonator can be reduced by factors >10 – 100 depending upon nanostructure dimensions and choice of cladding. The analysis further suggests a lower bound for the sub-diffractive all-dielectric mode volume, Vmin’, which scales in proportion to the mode order m times the refractive index raised to the seventh power, i.e.: Vmin’ ≈mn−7. Experimentally, these sub-diffractive WGM devices are shown to support standing wave resonances while maintaining high intrinsic quality factors ≈104–105. These metawaveguide ring resonators present a promising WGM platform for interfacing wavelength-scale optics with sub-wavelength matter.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"58 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143470472","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}

引用次数: 0

Highly Efficient and Thermally Stable NIR-Emitting Phosphor with Largely Tunable Peak Wavelength and Bandwidth Toward NIR Spectroscopy Applications

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-21 DOI: 10.1002/lpor.202402226

Xiaoyuan Chen, Xiaoyong Huang

{"title":"Highly Efficient and Thermally Stable NIR-Emitting Phosphor with Largely Tunable Peak Wavelength and Bandwidth Toward NIR Spectroscopy Applications","authors":"Xiaoyuan Chen, Xiaoyong Huang","doi":"10.1002/lpor.202402226","DOIUrl":"https://doi.org/10.1002/lpor.202402226","url":null,"abstract":"Developing tunable broadband near-infrared (NIR) fluorescent materials with outstanding luminescence properties and superior thermal robustness remains a significant challenge for next-generation intelligent NIR light sources. Herein, a high-performance large-scale tunable NIR-emitting garnet-type phosphor, SrLu2Al3ScSiO12:Cr3+ (SLASSO:Cr3+), is presented. Upon 450 nm blue light excitation, SLASSO:1%Cr3+ phosphor yields a broadband emission with full width at half maximum of 108 nm and a prominent sharp peak at 694 nm superimposed on a broadband radiation, which is attributed to the co-occupation of Cr3+ ions at the dominant [AlO6] octahedral site (Cr1 site) and subordinate [ScO6] octahedral site (Cr2 site). Remarkably, as the Cr3⁺ content increases, a significant red-shift in emission peak wavelength spanning from 694 to 785 nm and emission bandwidth broadening from 89 to 152 nm are observed, which stems from the weakening of the crystal field strength and the energy redistribution within Cr1 and Cr2 luminescence centers regulated by the formation of the local Cr3+-Cr3+ ion pairs. Notably, the optimal SLASSO:1%Cr3+ sample boasts an excellent internal quantum efficiency of 89.4% and an exceptional thermal stability (97.6%@423 K). Additionally, the fabricated NIR phosphor-converted light-emitting diode devices demonstrate promising multi-functional applications, including plant cultivation, night vision, bioimaging and non-destructive detection.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"65 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463160","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}

引用次数: 0

Boosting X-Ray-Activated Persistent Luminescence in Nanoparticles Toward Highly Accurate Flexible X-Ray Imaging and Information Security

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-21 DOI: 10.1002/lpor.202401261

Guohui Wei, Chao Wang, Jinshu Huang, Haopeng Wei, Bo Zhou

{"title":"Boosting X-Ray-Activated Persistent Luminescence in Nanoparticles Toward Highly Accurate Flexible X-Ray Imaging and Information Security","authors":"Guohui Wei, Chao Wang, Jinshu Huang, Haopeng Wei, Bo Zhou","doi":"10.1002/lpor.202401261","DOIUrl":"https://doi.org/10.1002/lpor.202401261","url":null,"abstract":"The X-ray activated persistent luminescence (PersL) observed in lanthanide-doped nanoparticles has recently attracted widespread interest in both basic research and cutting-edge applications. However, how to realize intense, rich, and color-tunable PersL in nanoparticles has remained a challenge. Here a conceptual strategy is reported to enhance the X-ray-activated PersL of nanoparticles by minimizing the hydroxyl impurities inside the host lattice. This study shows that the anhydrides/acids treatment during synthetic procedures is able to reduce the hydroxyl impurities inside fluoride nanocrystal lattice markedly, and promote the formation of Frenkel defects by moving more F− ions from their lattice sites into interstitial sites under X-ray irradiation. A mechanism is proposed to illustrate the enhancement of PersL in hydroxyl-minimized nanoparticles. The radioluminescence is also enhanced, and the multimode luminescence in a single nanoparticle is further obtained by the core-shell nanostructure design with temporally tunable multi-colors output. These findings facilitate the development of small-size X-ray-activated PersL nanomaterials and provide more opportunities for their frontier applications in optical storage, information identification, and flexible optical imaging.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"24 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463085","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}

引用次数: 0

Thermally Controlled Multi‐Functional Waveguide Photodetector

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2025-02-21 DOI: 10.1002/lpor.202402072

Jianing Wang, Guoyi Tao, Zimeng Zhang, Yihang Li, Shumin Xiao, Chaoran Huang, Qinghai Song, Hon Ki Tsang, Ke Xu

{"title":"Thermally Controlled Multi‐Functional Waveguide Photodetector","authors":"Jianing Wang, Guoyi Tao, Zimeng Zhang, Yihang Li, Shumin Xiao, Chaoran Huang, Qinghai Song, Hon Ki Tsang, Ke Xu","doi":"10.1002/lpor.202402072","DOIUrl":"https://doi.org/10.1002/lpor.202402072","url":null,"abstract":"Photodetectors are one of the fundamental building blocks in integrated photonic systems. They mainly serve to convert optical to electrical signals by absorbing photons in semiconductors which have a bandgap smaller than the photon energy. The constraint on photon energy in relation to the bandgap of commonly available semiconductor materials hinders the application of integrated photonics for some emerging applications. Here a novel waveguide detector integrated with on‐chip heater is proposed. Tunable bandgap can be achieved via local heating, which changes absorption characteristics. Based on this mechanism, the multi‐functional germanium detector for three different applications including broadband optical communications, optical neural networks, and optical spectral sensing is demonstrated. The proposed photodetector enables high‐speed detection at extended long wavelengths. In an artificial neural network, the controllable photoresponse allows for a tailorable nonlinear activation function to be implemented. It is also capable of retrieving spectral information via a single tunable detector without the need for any other optical components. This work not only proposes a new waveguide photodetector structure but also identify an approach to make multi‐functional photodetectors that can be used in different photonic integration platforms.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143462918","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}

引用次数: 0