Optics Communications最新文献_第5页

Photorefractive dark solitary wave formation in semiconductor GaAs/AlGaAs structures 半导体砷化镓/砷化镓结构中的光折射暗孤波形成

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-10 DOI: 10.1016/j.optcom.2025.131857

Andrzej Ziółkowski, Ewa Weinert-Rączka

{"title":"Photorefractive dark solitary wave formation in semiconductor GaAs/AlGaAs structures","authors":"Andrzej Ziółkowski, Ewa Weinert-Rączka","doi":"10.1016/j.optcom.2025.131857","DOIUrl":"10.1016/j.optcom.2025.131857","url":null,"abstract":"<div><div>Dark photorefractive solitons generated in semiconductor materials can be used to induce optical waveguides, which could be a step towards the construction of reconfigurable optical circuits. Compared to bright solitons, dark solitons have the advantage of lower refractive index changes needed for their generation. The authors present results of research on the generation of dark spatial solitons in photorefractive semiconductor materials characterised by bipolar charge carrier transport and nonlinear electron transport. The study has been carried out for an external electric field of strength values lower than those applied in research on bright solitons. Three qualitatively different photorefractive responses have been distinguished in the outcome of the analysis, namely: a standard response, a nonlocal, strongly asymmetric response, and a response consisting in the generation and oscillation of charge carrier domains. The complex process of soliton formation has been discussed and the feasibility of extending the research to include the application-relevant, telecommunication wavelength band has been highlighted.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"585 ","pages":"Article 131857"},"PeriodicalIF":2.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143826175","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}

引用次数: 0

Atmospheric turbulence characterization with optical vortex density 利用光涡密度确定大气湍流特征

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-10 DOI: 10.1016/j.optcom.2025.131826

Damián Gulich , Astrid Villamizar , N. Lucía Cap , Myrian Tebaldi

{"title":"Atmospheric turbulence characterization with optical vortex density","authors":"Damián Gulich , Astrid Villamizar , N. Lucía Cap , Myrian Tebaldi","doi":"10.1016/j.optcom.2025.131826","DOIUrl":"10.1016/j.optcom.2025.131826","url":null,"abstract":"<div><div>This study presents a novel approach to characterizing atmospheric turbulence through the analysis of optical vortex density. Using images propagated through a controlled turbulence chamber, we demonstrate a robust linear correlation (<span><math><mrow><msup><mrow><mi>R</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>=</mo><mn>0</mn><mo>.</mo><mn>9932</mn></mrow></math></span>) between vortex density and turbulence intensity. By applying Poincaré sphere filtering to isolate stable vortices, we enhance measurement accuracy and reliability. Experimental results reveal a robust linear relationship between vortex density and the refractive index structure constant, with a high goodness of fit. Experimental results validate the use of vortex density as a precise, non-intrusive metric for turbulence quantification, with significant potential applications in adaptive optics, free-space optical communications, and remote sensing. This approach offers a promising direction for atmospheric turbulence characterization, with scalability to natural environments and long-distance propagation scenarios.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"585 ","pages":"Article 131826"},"PeriodicalIF":2.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828139","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}

引用次数: 0

8-Channel duplex tunable cascaded DFB laser array based on REC technique 基于REC技术的8通道双工可调谐级联DFB激光阵列

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-10 DOI: 10.1016/j.optcom.2025.131862

Jingwei Meng , Zijiang Yang , Zhenzhen Xu , Jihong Xu , Jie Zeng , Pan Dai , Zhenxing Sun , Xiangfei Chen , Hui Liu

引用次数: 0

A terahertz full-adder based on VO2-integrated cascaded metasurfaces 基于vo2集成级联超表面的太赫兹全加法器

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-10 DOI: 10.1016/j.optcom.2025.131863

Jia Ran , Wang Xiong , Shiwei Zhao , Yi Ren , Kunio Okimura

{"title":"A terahertz full-adder based on VO2-integrated cascaded metasurfaces","authors":"Jia Ran , Wang Xiong , Shiwei Zhao , Yi Ren , Kunio Okimura","doi":"10.1016/j.optcom.2025.131863","DOIUrl":"10.1016/j.optcom.2025.131863","url":null,"abstract":"<div><div>Dynamic terahertz(THz) metasurfaces(MSs) show great potential in future electromagnetic wave computing and communication applications. Here, we present the first THz complex logic operations for realizing full-adder operation based on electrically controlled vanadium dioxide (VO<sub>2</sub>)-integrated cascaded MSs. Owing to insulator-to-metal phase transition (IMT) characteristics of VO<sub>2</sub>, MSs integrated with VO<sub>2</sub> thin film patches can act as switches to change transmittance of THz waves, achieving a high contrast ratio and enabling logic operations. The performance of cascaded MSs and the method of constructing the complex logic operations between multiple inputs and outputs are thoroughly discussed. Finite Element Method (FEM) simulation results verify the performance of each MS of the proposed full-adder. Each logic gate constructed by MS has a compact size and contrast ratio greater than 15 dB at 0.66 THz for the output ‘‘1″ and ‘‘0″ states, and 16.9 dB for the ‘‘Sum’’ operation and 15.5 dB for the ‘‘Cout’’ operation. This kind of THz full-adder potentially promotes the design and implementation of multifunctional electron-photon devices in THz computing and communication.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"585 ","pages":"Article 131863"},"PeriodicalIF":2.2,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835307","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}

引用次数: 0

Characterization and control of optical depth of 1 μm nd: YAG laser produced Sn plasma 1 μm nd: YAG激光产生锡等离子体光深的表征与控制

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-09 DOI: 10.1016/j.optcom.2025.131861

Tianze Wang , Zhenlin Hu , Liang He , Nan Lin , Yuxin Leng

引用次数: 0

Orthogonally polarized Sm:YLF/Sm:LLF orange lasers with output power-ratio and wavelength tuning 具有输出功率比和波长可调谐的正交偏振Sm:YLF/Sm:LLF橙色激光器

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-09 DOI: 10.1016/j.optcom.2025.131852

Chu Chu , Xinghua Yang , Shuang Wang , Changli Li , Xinhua Fu

{"title":"Orthogonally polarized Sm:YLF/Sm:LLF orange lasers with output power-ratio and wavelength tuning","authors":"Chu Chu , Xinghua Yang , Shuang Wang , Changli Li , Xinhua Fu","doi":"10.1016/j.optcom.2025.131852","DOIUrl":"10.1016/j.optcom.2025.131852","url":null,"abstract":"<div><div>A continuous-wave (CW) orthogonally polarized dual-wavelength (OPDW) Sm<sup>3+</sup>:LiYF<sub>4</sub>/Sm<sup>3+</sup>:LiLuF<sub>4</sub> (Sm:YLF/Sm:LLF) orange laser at 605 and 606 nm on the <sup>4</sup>G<sub>5/2</sub> → <sup>6</sup>H<sub>7/2</sub> transition with power-ratio tuning was demonstrated for the first time. The waist position of the pump beam were optimized to achieve high efficiency and balanced output powers of the OPDW orange laser. Under pumping with a frequency-doubled optically pumped semiconductor laser (2ω-OPSL) emitting 10 W at 479 nm, an OPDW orange laser at 605 and 606 nm was obtained with the highest total output power of 1.41 W. The highest total optical-to-optical conversion efficiency with respect to the absorbed pump power was 16.5 %. Furthermore, a CW OPDW Sm:YLF/Sm:LLF orange laser with wavelength tuning was also studied. The nine pairs of the OPDW orange lasers were realized by adjusting the Lyot filters. The highest total output power of 1.68 W was obtained at 605 and 606 nm with power ratio of 1:1, resulting in an optical-to-optical conversion efficiency of 22.5 % with respect to the absorbed pump power.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"585 ","pages":"Article 131852"},"PeriodicalIF":2.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815326","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}

引用次数: 0

Generation, propagation, and self-healing properties of annular optical vortex lattices 环形光学涡旋晶格的产生、传播和自愈特性

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-09 DOI: 10.1016/j.optcom.2025.131860

Hao Luo , Yidan Zhang , Suling Sang , Zijing Wang , Peng Li , Feng Wen , Yuzong Gu , Zhenkun Wu

引用次数: 0

A dynamically tunable four-narrowband terahertz absorber based on Dirac semimetal for perfect absorption and high sensitivity 基于狄拉克半金属的动态可调谐四窄带太赫兹吸收体，具有完美的吸收和高灵敏度

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-09 DOI: 10.1016/j.optcom.2025.131845

Weijun Zhou , Youqi Zhang , Xuefeng Qin , Yang Huang , Zhiming Huang , Nianxi Xu , Ben-Xin Wang

{"title":"A dynamically tunable four-narrowband terahertz absorber based on Dirac semimetal for perfect absorption and high sensitivity","authors":"Weijun Zhou , Youqi Zhang , Xuefeng Qin , Yang Huang , Zhiming Huang , Nianxi Xu , Ben-Xin Wang","doi":"10.1016/j.optcom.2025.131845","DOIUrl":"10.1016/j.optcom.2025.131845","url":null,"abstract":"<div><div>Multi-band terahertz metamaterial absorbers are essential in modern scientific research and practical applications, with broad usage in areas such as biomedical sensing, high-precision spectroscopy. This study presents a four-band tunable narrowband terahertz absorber utilizing Dirac semimetal (BDS), offering dynamic tuning capabilities and high absorption efficiency. It is demonstrated that the absorber achieves over 96 % perfect absorption across four bands in the range of 0.1–2.4 THz, with two peaks exceeding 99 % absorption. The designed absorber exhibits excellent dynamic tunability, enabling adjustment of the absorption frequencies and rates of the four modes by modulating the Fermi energy level of BDS. The absorption mechanism is studied through impedance matching theory and near-field distribution, while coupling and perturbation theories are used to analyze how the top layer's structure affects the resonance frequency. Additionally, for refractive index detection of analytes, the results show that the narrowband absorber exhibits excellent capabilities with a sensitivity of up to 145 GHz/RIU and a quality factor (Q) of 77. These features enable the absorber suitable for broader applications, including stealth technology, medical diagnostics, and terahertz communications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"584 ","pages":"Article 131845"},"PeriodicalIF":2.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808439","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}

引用次数: 0

Bound states in the continuum resonance with high Q factor and strong robustness based on material asymmetric metasurfaces 基于材料非对称超表面的高Q因子强鲁棒性连续共振束缚态

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-09 DOI: 10.1016/j.optcom.2025.131844

Xiaowei Jiang , Chunlian Zhan , Lin Yin

{"title":"Bound states in the continuum resonance with high Q factor and strong robustness based on material asymmetric metasurfaces","authors":"Xiaowei Jiang , Chunlian Zhan , Lin Yin","doi":"10.1016/j.optcom.2025.131844","DOIUrl":"10.1016/j.optcom.2025.131844","url":null,"abstract":"<div><div>Currently, most quasi bound states in the continuum (QBIC) resonances are achieved by breaking the geometric symmetry of metasurfaces, which imposes a fundamental limit on the lowest achievable geometrical asymmetry and limits the tuning of QBIC resonances. Additionally, the <em>Q</em> factor of QBIC resonances rapidly decreases with the increase in geometric asymmetry and results in poor robustness. To address this issue, this work proposes a material asymmetric triple parallel nanorod metasurface (triple-PNM) that can excite high-<em>Q</em> and strong-robustness QBIC resonances. Moreover, QBIC resonance linewidth and <em>Q</em> factor can be tuned by adjusting two material asymmetry parameters of triple-PNM. The impact of fabrication errors on the resonance wavelengths and <em>Q</em> factor of the QBIC resonance was analyzed in detail. The QBIC resonance excited by the triple-PNM was applied to enhance the Goos–Hänchen (GH) shift, so GH shift can be tuned by adjusting the material asymmetry parameter and incident angle. In addition, sensors based on GH effect were found to have extremely high sensitivity.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"585 ","pages":"Article 131844"},"PeriodicalIF":2.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843759","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}

引用次数: 0

Establishing the new 2 μm passive Q-switching rate equation: Incorporating energy transfer based on dual energy level system 建立新的2 μm被动q开关速率方程：基于双能级系统的能量传递

IF 2.2 3区物理与天体物理

Optics Communications Pub Date : 2025-04-09 DOI: 10.1016/j.optcom.2025.131859

Qiujing Lin, Xin He, Junwei Xu, Yancheng Xia, Kuan Li, Chunting Wu, Yao Ma

{"title":"Establishing the new 2 μm passive Q-switching rate equation: Incorporating energy transfer based on dual energy level system","authors":"Qiujing Lin, Xin He, Junwei Xu, Yancheng Xia, Kuan Li, Chunting Wu, Yao Ma","doi":"10.1016/j.optcom.2025.131859","DOIUrl":"10.1016/j.optcom.2025.131859","url":null,"abstract":"<div><div>New 2 μm passive Q-switching rate equations based on a dual energy level system were established in our research. These equations comprehensively account for the energy transfer mechanisms between Tm<sup>3+</sup> ions and the saturable absorber, including spontaneous emission, cross relaxation, up-conversion, and reabsorption effects. Building on this foundation, we experimentally employ black phosphorus, a new two-dimensional material with a bandgap ranging from 0.3 eV (bulk) to 1.5 eV (monolayer), into the Tm: LuAG laser as a saturable absorber for the first time. Consequently, this provides a new technical pathway for achieving efficient and stable passive Q-switching operation. In the experiment, with a pump power of 16.22 W, the laser produced an average output of 1.42 W, a repetition rate of 47.23 kHz, and a pulse width of 1.02 μs Compared with conventional models, the new model improved predictive accuracy for pulse width, repetition rate, and peak power by 1.54 %–5 %. These findings demonstrate the new model's significant advantages in describing the output characteristics of 2 μm passively Q-switched lasers and establish a solid theoretical foundation for further investigations into passive Q-switching rate equations for specific laser systems.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"585 ","pages":"Article 131859"},"PeriodicalIF":2.2,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835308","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}

引用次数: 0