Laser & Photonics Reviews最新文献_第8页

Programmable Metamaterial for In-Plane Electromagnetic Wave Control in the Microwave Range

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-12 DOI: 10.1002/lpor.202401472

Xiaojun Hu, Liang Peng, Ruofan Zhuo, Shuang Zhang, Dexin Ye

{"title":"Programmable Metamaterial for In-Plane Electromagnetic Wave Control in the Microwave Range","authors":"Xiaojun Hu, Liang Peng, Ruofan Zhuo, Shuang Zhang, Dexin Ye","doi":"10.1002/lpor.202401472","DOIUrl":"https://doi.org/10.1002/lpor.202401472","url":null,"abstract":"Tunable and programable devices hold a significant interest in electromagnetic (EM) engineering. A notable example is the programmable metasurfaces, which are quite powerful in controlling the phase front and steering beam of free-space waves. Similarly, managing in-plane EM waves on board is crucial for various applications. However, a programmable metamaterial (PMM) suitable for in-plane EM wave control is yet to be developed. Here, a PMM is presented that dynamically controls in-plane waves and is integrated on-boardly. The PMM is designed by incorporating metallic structures and tunable varactors. By biasing the varactors, a bulk module composed of an array of metamaterial unit cells can exhibit varied responses to incoming waves. As proof of concept, a PMM module for microwave control is fabricated and measured. In experiments, the PMM is successfully programmed to perform three distinct functions: wave splitting, Luneburg focusing, and wave differentiation, around the destination frequency (4.5 GHz). Although the PMM is dispersive and its bandwidth is somehow limited, its central frequency can be shifted in a dynamic range from 4 to 5 GHz. The proposed PMM resembles a miniaturized platform for reprogrammable in-plane wave control and manipulation, showing promise for realizing full wave operators, integrable computing, and deep learning devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"5 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810148","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

Hydrogen-Sensitive Inks with 4D Printing of a Fiber-Tip Hydrogen Microsensor

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-12 DOI: 10.1002/lpor.202400179

Changrui Liao, Haoqiang Huang, Mengqiang Zou, Ying Wang, Shangben Jiang, Dezhi Zhu, Jiabin Huang, Jiajun Guan, Famei Wang, Cong Zhao, Mengjie Zheng, Weijia Bao, Dejun Liu, Xiaoyu Weng, Liwei Liu, Junle Qu, Yiping Wang

{"title":"Hydrogen-Sensitive Inks with 4D Printing of a Fiber-Tip Hydrogen Microsensor","authors":"Changrui Liao, Haoqiang Huang, Mengqiang Zou, Ying Wang, Shangben Jiang, Dezhi Zhu, Jiabin Huang, Jiajun Guan, Famei Wang, Cong Zhao, Mengjie Zheng, Weijia Bao, Dejun Liu, Xiaoyu Weng, Liwei Liu, Junle Qu, Yiping Wang","doi":"10.1002/lpor.202400179","DOIUrl":"https://doi.org/10.1002/lpor.202400179","url":null,"abstract":"Optical fiber hydrogen (H2) sensors have garnered attention for avoiding explosion hazards in flammable gas environments. Conventional optical fiber sensors rely on electron beam sputtering and chemical coating for functionalization, but these methods may not achieve precise functionalization of intricate structures. Based on 4D printing principles, an H2-sensitive ink containing methacrylate groups modified palladium (Pd) nanoparticles (NPs) is reported, with a printing resolution of 200 nm. Then, a fiber-tip clamped-beam H2 sensor is fabricated with the femtosecond (Fs) laser-induced two-photon polymerization (TPP) technique. The sensor exhibits compact dimensions and fast responses, only 2.64 s for a 4.0 vol.% H2 concentration. A high sensitivity of roughly 165 pm %−1 is achieved as the H2 concentration increases from 0% to 5.5 vol.%. This study demonstrates that H2-sensitive microstructures can be flexibly achieved by TPP of H2-sensitive inks, offering a solution for achieving on-chip direct laser writing of integrated H2 microsensors.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"141 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810149","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

Decoupling the Conductivity–Fluorescence Tradeoff of SnO2 Nanocrystals for Efficient and Stable Quantum Dot Light-Emitting Diodes

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-11 DOI: 10.1002/lpor.202401755

Xueqing Xia, Xingtong Chen, Jiachen Xie, Xinrui Li, Song Chen

{"title":"Decoupling the Conductivity–Fluorescence Tradeoff of SnO2 Nanocrystals for Efficient and Stable Quantum Dot Light-Emitting Diodes","authors":"Xueqing Xia, Xingtong Chen, Jiachen Xie, Xinrui Li, Song Chen","doi":"10.1002/lpor.202401755","DOIUrl":"https://doi.org/10.1002/lpor.202401755","url":null,"abstract":"Electron-transporting layers (ETLs) assembled from SnO2 nanocrystals show promise in addressing the stability issues faced by solution-processed quantum dot light-emitting diodes (QLEDs). However, the electrical conductivity of SnO2 nanocrystals bottlenecks QLED performance, and efforts to achieve effective n-type doping are constrained by dopant availability and charge-induced exciton quenching. In response, Sb-doped SnO2 nanocrystals with doping concentrations less than 1 mol% are explored, a range overlooked in previous research, and the ETL is designed accordingly. Comprehensive characterizations reveal that 0.45 mol% Sb doping transitions the electrical conduction from trap-limited to trap-free space-charge-limited, and 0.84 mol% doping results in Ohmic conduction, along with a 100-fold conductivity enhancement. Meanwhile, trap-filling mitigates the fluorescence quenching of the colloidal quantum dots, with significant increases only observed when doping concentrations exceed 0.45 mol%. Drawing inspiration from these findings, a SnO2 ETL with gradient Sb doping levels for QLEDs to decouple the conductivity–fluorescence tradeoff is developed. Consequently, this ZnO-free QLED significantly outperforms comparable devices, achieving a luminance of 2.8 × 105 cd m−2, an external quantum efficiency of 18.3%, and a T95 operational lifetime of 4320 h at 1000 cd m−2, all while showing no signs of positive aging.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"29 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810150","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

Wavelength Decoupling Based on Minimalist Metasurfaces Enabling Bicolor Display and Information Encryption

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-11 DOI: 10.1002/lpor.202401599

Tian Huang, Yingxin Xie, Zhiyao Zhang, Yu Zhao, Dongyu Hu, Shaohua Yu, Guoxing Zheng, Gongfa Li, Zile Li

引用次数: 0

Integrated Optical Tunable Delay Line and Microwave Photonic Beamforming Chip: A Review

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-10 DOI: 10.1002/lpor.202400663

Shangqing Shi, Hongsheng Niu, Wenhu Shi, Dongdong Lin, Simin Li, Shilong Pan, Binfeng Yun

引用次数: 0

Exciton Thermodynamics in Pure Diamond 纯金刚石中的激子热力学

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-10 DOI: 10.1002/lpor.202400935

Lu Cheng, Wei Zheng

{"title":"Exciton Thermodynamics in Pure Diamond","authors":"Lu Cheng, Wei Zheng","doi":"10.1002/lpor.202400935","DOIUrl":"https://doi.org/10.1002/lpor.202400935","url":null,"abstract":"Low-temperature condensation thermodynamics is a fundamental research in the field of condensed matter physics. Prior studies have extensively explored the exciton condensation of indirect-bandgap semiconductors like silicon (Si) and germanium (Ge), which predominantly focus on temperature effects but neglect the relationship between the initial condensed state and the external excitation power density. Here, based on pure diamond, the impact of excitation power density on condensed-state thermodynamics is analyzed. With power density as a key variable, an inter-dependency among exciton, electron–hole plasma, and electron–hole droplets can be observed in diamond. For instance, as the average excitation power density increases (6.15 to 246 mW cm−2), the exciton emission quenching temperature rises from 60 to 120 K. This is because the variation in initial states of the excitonic condensed phase under different excitation power densities leads to the changes in quenching energy, which subsequently affects the temperature dependence of the exciton quenching. This study pioneers a novel approach to explore luminescent thermodynamics in indirect-bandgap semiconductors with both excitation power density and temperature considered as dimensions simultaneously.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797784","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

Computational Imaging Encryption with Steganography and Lanthanide Luminescent Materials

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-09 DOI: 10.1002/lpor.202401589

Mengyang Lu, Yao Xie, Jiwei Li, Wenting Gu, Lining Sun, Xin Liu

{"title":"Computational Imaging Encryption with Steganography and Lanthanide Luminescent Materials","authors":"Mengyang Lu, Yao Xie, Jiwei Li, Wenting Gu, Lining Sun, Xin Liu","doi":"10.1002/lpor.202401589","DOIUrl":"https://doi.org/10.1002/lpor.202401589","url":null,"abstract":"Optical encryption is a potential scheme for information security that exploits abundant degrees of freedom of light to encode information. However, conventional encryption based on fluorescent materials faces challenges in handling complex secret information. Alternatively, single-pixel imaging (SPI) provides a computational modality to solve these problems. In this study, a high-capacity fluorescence encryption scheme, achieved by introducing lanthanide materials and steganography into the encoding and decoding processes of SPI is proposed. Two types of well-designed lanthanide luminescent materials are utilized and excited to generate fluorescence images (fluo-images), which are crucial in this scheme. Various practical experiments using fluo-images as secret keys demonstrate the robustness, effectiveness, and repeatability of this scheme. Furthermore, multi-image experiments indicate the potential of this method to increase secret information capacity. Thus, the proposed fluorescence encryption scheme does provide an efficient computational encryption strategy based on lanthanide luminescent materials for information security, which can improve the security of traditional optical encryption and simultaneously enhance the flexibility of SPI computational decryption.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"20 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793297","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

Disentangling Structural Domains in Solution-Processed 2D Lead Halide Perovskite by Transient Absorption Spectroscopy

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-09 DOI: 10.1002/lpor.202401478

Mu-Sen Song, Hai Wang, Yu-Peng Zhang, Zi-Fan Hu, Jia Zhang, Yuan Wang, Le-Yi Zhao, Hai-Yu Wang

{"title":"Disentangling Structural Domains in Solution-Processed 2D Lead Halide Perovskite by Transient Absorption Spectroscopy","authors":"Mu-Sen Song, Hai Wang, Yu-Peng Zhang, Zi-Fan Hu, Jia Zhang, Yuan Wang, Le-Yi Zhao, Hai-Yu Wang","doi":"10.1002/lpor.202401478","DOIUrl":"https://doi.org/10.1002/lpor.202401478","url":null,"abstract":"2D lead halide perovskites (LHPs) exhibit outstanding optoelectronic properties, making them utilized in various emerging applications. Understanding their fundamental properties is urgent for improving device performance. Here, the structural domains in 2D PEA2MAn-1PbnI3n+1 films are studied by temperature-dependent transient absorption (TA) measurements. For <n> = 1 film at low temperatures, the ground state bleach (GSB) shows obvious splitting when the high-energy state is resonantly excited, whereas only one GSB exists under low-energy resonant excitation, indicating that the two split energy states correspond to different structural domains. For <n> = 2 film, similar phenomena are observed, but the energy level difference between the two domains is decreased. With further increase of the inorganic layers number, the two domains can no longer be distinguished. In addition, by changing the organic cations, it is demonstrated that the two structural domains originate from distortions in the inorganic PbI6 octahedral frames. Finally, the possibility that the two energy states are from the formation of polaron states is ruled out by TA measurement on CsPbBr3 QDs. The results provide new insights into the structural domain properties of 2D LHPs, which directly influence the suitability of these materials for future optoelectronic devices.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"9 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793303","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

Ultra-Large Bandwidth and Ultra-High Sensitivity Germanium/Silicon Avalanche Photodiode

IF 11 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-09 DOI: 10.1002/lpor.202401574

Mingjie Zou, Yang Shi, Sizhe Xing, Zuhang Li, Junwen Zhang, Yu Yu, Xinliang Zhang

{"title":"Ultra-Large Bandwidth and Ultra-High Sensitivity Germanium/Silicon Avalanche Photodiode","authors":"Mingjie Zou, Yang Shi, Sizhe Xing, Zuhang Li, Junwen Zhang, Yu Yu, Xinliang Zhang","doi":"10.1002/lpor.202401574","DOIUrl":"https://doi.org/10.1002/lpor.202401574","url":null,"abstract":"Germanium/silicon (Ge/Si) avalanche photodiode (APD) has emerged as a highly desirable component for optical communication, sensing, and computing, attributed to its inherent gain. Conventional schemes typically suffer from limited bandwidth and significant excess noise due to the high gain, restricting the high-sensitivity detection in burgeoning high-speed applications. Here, a Ge/Si APD is developed with an ultra-large bandwidth at an optimal gain. This breakthrough is achieved by implementing an extremely narrow multiplication layer to enhance the space charge effect, overcoming the intrinsic bandwidth limitation in conventional APDs while elaborately harnessing the gain to a moderate value to ensure the optimal sensitivity. The device possesses a bandwidth of 67 GHz at an optimal gain of 6.6 and enables data reception of 240 Gb s−1 four-level pulse amplitude modulation signal—the largest bandwidth and highest single-channel bitrate among all reported APDs. The presented APD suggests promising applications for high-speed and high-sensitivity data communication owing to its competitive performance, cost-effectiveness, and high-yield production.","PeriodicalId":204,"journal":{"name":"Laser & Photonics Reviews","volume":"16 1","pages":""},"PeriodicalIF":11.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793304","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

Topologically Protected Single Edge Mode Lasing in Photonic Crystal Su–Schrieffer–Heeger Lattice with Directional Loss Control (Laser Photonics Rev. 18(12)/2024)

IF 9.8 1区物理与天体物理

Laser & Photonics Reviews Pub Date : 2024-12-09 DOI: 10.1002/lpor.202470077

Xiao-Tian Cheng, Ling-Fang Wang, Yuan-Zhen Li, Dai-Bao Hou, Jia-Wang Yu, Chen-Hui Li, Xing Lin, Feng Liu, Fei Gao, Chao-Yuan Jin

引用次数: 0