Laser & Photonics Reviews最新文献

{"title":"Integrated Microwave Photonics Multi-Parameter Measurement System","authors":"Yong Zheng, Zhen Han, Liheng Wang, Pu Zhang, Yongheng Jiang, Huifu Xiao, Xudong Zhou, Mingrui Yuan, Mei Xian Low, Aditya Dubey, Thach Giang Nguyen, Qinfen Hao, Guanghui Ren, Arnan Mitchell, Yonghui Tian","doi":"10.1002/lpor.202500013","DOIUrl":"https://doi.org/10.1002/lpor.202500013","url":null,"abstract":"Driven by the growing demands in wireless communication, remote sensing and emerging 6G networks, research on microwave signal measurement techniques has attached intensive attention. Unlike conventional electronic-based approaches, photonics chip-based microwave signal measurement systems offer significant advantages, including broad operation bandwidth, reduced weight, and enhanced resistance to unwanted electromagnetic interference. Despite notable progress in integrated microwave photonic measurement systems, the majority remains constrained by bandwidth below 30 GHz, primarily due to the limitation of modulators. Furthermore, most previous studies focus on the measurement of one single parameter, typically the frequency, limiting their applications in more complex, real-world situations. Here, an on-chip photonic microwave multi-parameter measurement system is presented on the thin-film lithium niobate (TFLN) platform. The system enables measurement of microwave frequency, phase, and amplitude, offering an ultra-high bandwidth (up to 60 GHz) with low root-mean-squared errors: 450 MHz for frequency, 3.43° for phase, and 1.64% for amplitude. Additionally, the system is validated by the time-domain reconstruction of unknown sinusoidal microwave signals based on measurement results. This demonstration further broadens the scope of integrated TFLN photonic devices for microwave signal measurement, providing a viable solution to the bandwidth limitations of existing microwave networks and addressing the increasing demands of future information-driven technologies.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"36 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737154","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}

{"title":"Toward Wide-Angle III-Nitride Miniaturized LEDs: Device Engineering and Photon Extraction Strategy","authors":"Lang Shi, Siyuan Cui, Ziqi Zhang, Jingjing Jiang, Yuechang Sun, Sheng Liu, Shengjun Zhou","doi":"10.1002/lpor.202401723","DOIUrl":"https://doi.org/10.1002/lpor.202401723","url":null,"abstract":"Miniaturized LEDs (mini-LEDs) constitute a high-quality light source in the backlight unit (BLU) of liquid crystal displays (LCDs). However, the Lambertian light field distribution of mini-LEDs leads to limited viewing angles and decreased uniformity in BLU. Here, a high-performance wide-angle mini-LED is demonstrated via device engineering and an innovative photon extraction strategy. By integrating distributed Bragg reflectors (DBRs) on the light emission surface of mini-LED, propagation behaviors of photons are manipulated and thus altered Lambertian light field distribution into heart-shaped light field distribution, realizing the construction of wide-angle mini-LED. Furthermore, the effects of the reflectivity of various DBRs on the light field distribution and optoelectronic characteristics of wide-angle mini-LEDs are systematically investigated. To boost the external quantum efficiency (EQE) of wide-angle mini-LEDs, a photon extraction strategy, including optimizing sapphire substrate thickness and employing multiple laser stealth scribing techniques is proposed. As a result, the optimal wide-angle mini-LED exhibits a peak light intensity angle of 38°, a full width at half maximum of angular light intensity distribution of 162° and a 21.3% increment in peak EQE, in comparison to the wide-angle mini-LED without utilizing photon extraction strategy. It believes these innovations provide a substantial advancement in developing wide-angle mini-LEDs, contributing to their application in LCDs.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"33 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736543","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}

{"title":"Spectrally Tunable Dual‐Phosphor Ceramics for Laser Lighting","authors":"Rundong Tian, Tianliang Zhou, Rong‐Jun Xie","doi":"10.1002/lpor.202402144","DOIUrl":"https://doi.org/10.1002/lpor.202402144","url":null,"abstract":"Luminescent composite ceramics with two or more distinct phosphors are required to finely control the optical properties of laser‐driven solid‐state lighting, but they are hardly densified due to their different sintering temperature and chemical reactions between them. Then, highly dense and efficient dual‐phosphor ceramics consisting of orange‐emitting Ca‐α‐SiAlON:Eu and yellow‐emitting YAG:Ce phosphors is successfully prepared by spark plasma sintering. Fine Ca‐α‐SiAlON:Eu powders and Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>‐coated YAG:Ce (YAG:Ce@Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>) powders are used as raw materials, which enable to obtain dense Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>‐Ca‐α‐SiAlON:Eu (Ceramic‐Ca) and Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>‐Ca‐α‐SiAlON:Eu‐YAG:Ce@Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> (Ceramic‐Ca+Y@Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub>) ceramics at 1480 °C. The chemical reaction between Ca‐α‐SiAlON:Eu and YAG:Ce can be hindered by using the Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> surface coating, and the photoluminescence properties of both phosphors are thus remainedduring high‐temperature sintering. The Ceramic‐Ca+Y@Al<jats:sub>2</jats:sub>O<jats:sub>3</jats:sub> show tunable spectra with emission maximum ranging from 541 to 601 nm, an external quantum efficiency of ≈42%, thermal conductivity of &gt;17.6 W m<jats:sup>−1</jats:sup> K, maximal luminance saturation of 18.8 W mm<jats:sup>−2</jats:sup>, excellent thermal and color stabilities. It demonstrates that the dual‐phosphor ceramics containing equivalent Ca‐α‐SiAlON:Eu and YAG:Ce allow to create super‐brightness laser lighting with an output luminous flux density of 782.5 lm mm<jats:sup>−2</jats:sup> and a color temperature of 2278 K. This work paves an avenue to fabricate multi‐phosphor composite ceramics for color‐temperature‐tunable laser‐driven white light.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"7 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143733883","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}

{"title":"Mid-Infrared Reflectance Modulator Based on a Graphene CMOS-Compatible Metasurface","authors":"Fei Han, Kacper Pilarczyk, Zaoyang Lin, Conglin Sun, Guy A. E. Vandenbosch, Joris Van de Vondel, Pol Van Dorpe, Xuezhi Zheng, Niels Verellen, Ewald Janssens","doi":"10.1002/lpor.202402258","DOIUrl":"https://doi.org/10.1002/lpor.202402258","url":null,"abstract":"Optical modulators based on tunable graphene-metal hybrid metasurfaces have emerged as promising optoelectronic devices due to their high speed and efficient modulation that is controllable through electrostatic gating. In particular, optical modulation in the mid-infrared region has attracted considerable interest for applications in biosensing, imaging, communication, and computing. However, the scalability of metasurfaces poses a challenge as typical fabrication pathways are not compatible with complementary metal-oxide-semiconductor (CMOS) technology. In this work, a tunable graphene-metasurface absorber is presented that integrates a metal-dielectric-metal optical cavity with a graphene layer. Stable performance in ambient conditions is achieved by the incorporation of an ultrathin Al₂O₃ capping layer. This barrier layer prevents direct contact between the metallic antennas and the graphene layer, which results in a large on/off ratio. For a gold metasurface, the creation of an optical cavity strongly enhances the modulation depth of the reflectance between 7 µm to 8 µm from 11% to 47%. By replacing gold with aluminum, a cost-effective material employed in foundry processes, a comparable maximum modulation depth of 49% is obtained. These results open a new pathway for the integration of tunable graphene–metal hybrid metasurfaces with CMOS-compatible technologies, facilitating a scalable production of mid-infrared modulators.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"69 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734421","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}

{"title":"Flexibly Prepared Tb3+-Doped Oxyfluoride Glass Scintillators with Enhanced Luminescence for X-Ray Imaging and Detection","authors":"Dandan Zhang, Shisheng Lin, Mengling Xia, Yu Rao, Sen Qian, Jing Ren, Xianghua Zhang, Yinsheng Xu, Daqin Chen","doi":"10.1002/lpor.202500354","DOIUrl":"https://doi.org/10.1002/lpor.202500354","url":null,"abstract":"The development of eco-friendly, flexibly preparable, and highly efficient glass scintillators is of paramount importance for practical applications in fields such as medical imaging and radiation detection. Herein, a series of Tb³⁺-doped oxyfluoride glass is successfully synthesized using the high-temperature melt-quenching method. The oxyfluoride glasses exhibit bright green photoluminescence with an internal quantum yield (IQE) of 95.6% and high optical transmittance exceeding 85% at 550 nm. Specifically, the optimized LASNG: 4 mol% Tb³⁺ glass demonstrates superior performance, including a significantly enhanced X-ray excites luminescence (XEL) with an integrated intensity 209% that of Bi₄Ge₃O₁₂ (BGO) and an exceptional spatial resolution of 30 lp∙mm⁻¹ under X-ray irradiation-surpassing most of the reported glass scintillators. Additionally, it also exhibits a linear response to X-ray dose rates with a low detection limit of 1.5 µGy∙s⁻¹ and maintains excellent irradiation stability under continuous X-ray exposure. This study proposes a promising approach for the development of cost-effective, high-resolution, and scalable glass scintillators tailored for X-ray imaging and detection applications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"21 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736545","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}

{"title":"White-Light Sensitization Strategy for Upconverting Anticounterfeiting","authors":"Yi Liu, Feng Liu, Chengrui Wang, Lizhu Sun, Bingbing Yang, Hao Wu, Liangliang Zhang, Jiahua Zhang, Xiao-jun Wang, Yichun Liu","doi":"10.1002/lpor.202500083","DOIUrl":"https://doi.org/10.1002/lpor.202500083","url":null,"abstract":"Upconversion luminescence (UCL) presents a promising avenue for optical anticounterfeiting applications; however, its practical implementation is often limited by low visibility in bright environments. In this study, a white-light sensitization strategy is introduced to significantly amplify UV UCL for improved security measures under well-lit conditions. By integrating 808 nm infrared excitation with a white-light flashlight exposure, a ten-fold increase in UCL intensity at 354 nm is achieved from a NaYF₄:Nd³⁺ phosphor. This enhancement arises from a multi-photon excitation process, wherein white light directly populates the high-lying ⁴G_7/2 and ⁴G_5/2 intermediate levels of Nd³⁺, excited states otherwise only accessible via two-photon infrared absorption. This white-light sensitization approach enables robust UV UCL emission to be detected even in bright settings, overcoming a major limitation of traditional UCL-based anticounterfeiting. Moreover, the feasibility of this method is demonstrated through UV imaging, highlighting its potential for advancing security and authentication technologies.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"216 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143736546","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}

{"title":"Second Harmonic Generation in Lithium Niobate on Insulator","authors":"Lun Qu, Wei Wu, Wei Cai, Mengxin Ren, Jingjun Xu","doi":"10.1002/lpor.202401928","DOIUrl":"https://doi.org/10.1002/lpor.202401928","url":null,"abstract":"This paper reviews recent advancements in second harmonic generation (SHG) within nanostructures of lithium niobate on insulator (LNOI). SHG devices are classified into in-plane and out-of-plane configurations, highlighting their suitability for different pumping conditions. The in-plane devices, with their small mode volume and ultra-narrow linewidth, demonstrate high-efficiency SHG under continuous wave pumping, making them ideal for miniaturized on-chip integrated devices. In contrast, the vertical cavities are best suited for broadband pulsed lasers, facilitating the creation of compact ultra-thin devices. This review summarizes the recent strides made in enhancing SHG efficiency for different designs in LNOI platform and underscores the potential of LN micro- and nanostructures to fulfill the requirements of modern ultracompact nonlinear devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"19 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143737158","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}

{"title":"Ultraviolet-C Vertical-Cavity Surface-Emitting Lasers with Precise Cavity Length Control","authors":"Estrella Torres, Joachim Ciers, Nelson Rebelo, Filip Hjort, Michael A. Bergmann, Sarina Graupeter, Johannes Enslin, Giulia Cardinalli, Tim Wernicke, Michael Kneissl, Åsa Haglund","doi":"10.1002/lpor.202402203","DOIUrl":"https://doi.org/10.1002/lpor.202402203","url":null,"abstract":"In vertical-cavity surface-emitting lasers (VCSELs), the cavity length defines the resonance wavelength, which is directly related to the laser detuning, that is, the difference between resonance wavelength and gain peak. A low detuning maximizes the modal gain leading to a reduction of the threshold. Therefore, controlling the cavity length of VCSELs is of great importance. Here optically pumped ultraviolet-C (wavelength &lt;span data-altimg=\"/cms/asset/d57feef1-9b06-406c-8cf7-efc907b5b4bb/lpor202402203-math-0001.png\"&gt;&lt;/span&gt;&lt;mjx-container ctxtmenu_counter=\"61\" ctxtmenu_oldtabindex=\"1\" jax=\"CHTML\" role=\"application\" sre-explorer- style=\"font-size: 103%; position: relative;\" tabindex=\"0\"&gt;&lt;mjx-math aria-hidden=\"true\" location=\"graphic/lpor202402203-math-0001.png\"&gt;&lt;mjx-semantics&gt;&lt;mjx-mo data-semantic- data-semantic-role=\"inequality\" data-semantic-speech=\"less than or equals\" data-semantic-type=\"relation\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mo&gt;&lt;/mjx-semantics&gt;&lt;/mjx-math&gt;&lt;mjx-assistive-mml display=\"inline\" unselectable=\"on\"&gt;&lt;math altimg=\"urn:x-wiley:18638880:media:lpor202402203:lpor202402203-math-0001\" display=\"inline\" location=\"graphic/lpor202402203-math-0001.png\" xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;semantics&gt;&lt;mo data-semantic-=\"\" data-semantic-role=\"inequality\" data-semantic-speech=\"less than or equals\" data-semantic-type=\"relation\"&gt;≤&lt;/mo&gt;$le$&lt;/annotation&gt;&lt;/semantics&gt;&lt;/math&gt;&lt;/mjx-assistive-mml&gt;&lt;/mjx-container&gt; 280 nm) VCSELs with precise cavity length control are demonstrated. The VCSEL structure is formed by an AlN cavity with 5 &lt;span data-altimg=\"/cms/asset/27c4a68f-7b40-4a2c-8633-660349f2bc57/lpor202402203-math-0002.png\"&gt;&lt;/span&gt;&lt;mjx-container ctxtmenu_counter=\"62\" ctxtmenu_oldtabindex=\"1\" jax=\"CHTML\" role=\"application\" sre-explorer- style=\"font-size: 103%; position: relative;\" tabindex=\"0\"&gt;&lt;mjx-math aria-hidden=\"true\" location=\"graphic/lpor202402203-math-0002.png\"&gt;&lt;mjx-semantics&gt;&lt;mjx-mrow&gt;&lt;mjx-mo data-semantic- data-semantic-role=\"unknown\" data-semantic-speech=\"times\" data-semantic-type=\"operator\"&gt;&lt;mjx-c&gt;&lt;/mjx-c&gt;&lt;/mjx-mo&gt;&lt;mjx-mrow&gt;&lt;/mjx-mrow&gt;&lt;/mjx-mrow&gt;&lt;/mjx-semantics&gt;&lt;/mjx-math&gt;&lt;mjx-assistive-mml display=\"inline\" unselectable=\"on\"&gt;&lt;math altimg=\"urn:x-wiley:18638880:media:lpor202402203:lpor202402203-math-0002\" display=\"inline\" location=\"graphic/lpor202402203-math-0002.png\" xmlns=\"http://www.w3.org/1998/Math/MathML\"&gt;&lt;semantics&gt;&lt;mrow&gt;&lt;mo data-semantic-=\"\" data-semantic-role=\"unknown\" data-semantic-speech=\"times\" data-semantic-type=\"operator\"&gt;×&lt;/mo&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;/mrow&gt;$ensuremath{times{}}$&lt;/annotation&gt;&lt;/semantics&gt;&lt;/math&gt;&lt;/mjx-assistive-mml&gt;&lt;/mjx-container&gt; Al&lt;sub&gt;0.40&lt;/sub&gt;Ga&lt;sub&gt;0.60&lt;/sub&gt;/Al&lt;sub&gt;0.70&lt;/sub&gt;Ga&lt;sub&gt;0.30&lt;/sub&gt;N quantum wells and a top HfO&lt;sub&gt;2&lt;/sub&gt; spacer layer with dielectric SiO&lt;sub&gt;2&lt;/sub&gt;/HfO&lt;sub&gt;2&lt;/sub&gt; distributed Bragg reflectors on both sides of the cavity. To access the N-face side of the cavity, a new methodology referred to as photo-assisted electrochemical etching is employed for substrate removal. Across a 0.9 mm &lt;span data-alti","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"7 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734420","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}

{"title":"Multichannel Fusion Structured Light 3D Imaging Based on Metasurfaces","authors":"Peng Liu, Fan Xu, Jiaru Chu, Yuhang Chen","doi":"10.1002/lpor.202402297","DOIUrl":"https://doi.org/10.1002/lpor.202402297","url":null,"abstract":"Structured light imaging, an advanced technology in computational 3D imaging, illuminates the target scene with structured light and then decodes the modulated light information to reconstruct the 3D object. The current structured light imaging systems are typically composed of a multitude of bulky diffractive optical elements and lenses, which impede their prospective integration and miniaturization. Furthermore, they are constrained to provide a narrow field of view and limited encoding information. Here, a multichannel fusion metasurface-based structured light imaging method is proposed, which can project two sets of phase-shifted fringes via a polarization multiplexed metasurface. This method allows for the encoding and analysis of more intricate information in the scene, including two sets of speckle patterns and two sets of fringe phases, by switching the orthogonal polarization orientation of the incident linearly polarized light. To fully exploit the modulated information, a speckle-and-phase fusion stereo reconstruction framework is developed, which enables high-resolution and high-precision 3D imaging via the fusion of multichannel information. This systematic solution for the metasurface-based structured light imaging paves the way for its practical applications.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"31 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143734422","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}

{"title":"1D Core–Shell Radial Heterojunction for High-Performance and Self-Powered Broadband Photodetector","authors":"Yi Ma, Wendong Lu, Wanyu Wang, Fumeng Zhang, Xiaoyu Xie, Zengliang Shi, Xiaoxuan Wang, Chunxiang Xu","doi":"10.1002/lpor.202402234","DOIUrl":"https://doi.org/10.1002/lpor.202402234","url":null,"abstract":"Through strategic engineering of component composition and energy band alignment, 1D core–shell nanostructures can be precisely designed as suitable radial heterostructures to confine the optical field and regulate carrier transport. These core–shell structures synergistically integrate and extend the functionalities of individual materials or devices. By integrating a <i>p</i>-type narrow-band Se material with an <i>n</i>-ZnO core, a 1D ZnO/Se core–shell radial heterojunction is fabricated for a self-powered broadband photodetector (PD). This 1D ZnO/Se core–shell radial heterostructure exhibits there main advantages: 1) forming a radial channel to make carriers transport more efficiently; 2) improving the efficiency of carrier transport and collection by introducing the high conductivity of Se layer; 3) passivating the surface defects of ZnO by Se shell layer. As a result, this core–shell radial heterojunction demonstrates high responsivity and detectivity across UV to visible light spectrum, with fast photoresponse times of 377/532 µs for rise/decay. These results revealed the superiority of 1D core–shell radial heterojunction in high-performance PDs, showing great potential for application in the development of advance optoelectronic devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"16 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143713545","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}