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Chinese Optics Letters最新文献

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Integrated fluorescence excitation, collection, and filtering on a GaN waveguide chip 集成荧光激发，收集，并在GaN波导芯片滤波
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.101203
Jiahui Zhang, Feng Xu, Ran An, Lin Wang, Min Jiang, Guanghui Wang, Yanqing Lu
{"title":"Integrated fluorescence excitation, collection, and filtering on a GaN waveguide chip","authors":"Jiahui Zhang, Feng Xu, Ran An, Lin Wang, Min Jiang, Guanghui Wang, Yanqing Lu","doi":"10.3788/col202321.101203","DOIUrl":"https://doi.org/10.3788/col202321.101203","url":null,"abstract":"Fluorescence detection is widely used in biology and medicine, while the realization of on-chip fluorescence detection is vital for the portable and point-of-care test (POCT) application. In this Letter, we propose an efficient fluorescence excitation and collection system using an integrated GaN chip consisting of a slot waveguide and a one-dimensional photonic crystal (1D PC) waveguide. The slot waveguide is used to confine the excitation light for intense light–sample interaction, and the one-trip collection efficiency at the end of slot waveguide is up to 14.65%. More interestingly, due to the introduction of the 1D PC waveguide, the fluorescence signal is directly filtered out, and the excitation light is reflected to the slot waveguide for multiple excitations. Its transmittances for the designed exciting wavelength of 520 nm and the fluorescent wavelength of 612 nm are 0.2% and 85.4%, respectively. Finally, based on numerical analysis, the total fluorescence collection efficiency in our system amounts to 15.93%. It is the first time, to our knowledge, that the concept of an all-in-one-chip fluorescence detection system has been proposed, which paves the way for on-chip fluorescence excitation and collection, and may find potential applications of miniaturized and portable devices for biomedical fluorescence detection.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136206809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Paper-based amorphous Ga2O3 solar-blind photodetector with improved flexibility and stability 纸基非晶态Ga2O3太阳盲光电探测器，具有更好的灵活性和稳定性
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.101601
Hanchi Xia, Tao Zhang, Yuehui Wang, Yaping Qi, Fan Zhang, Zhenping Wu, Yang Zhang
{"title":"Paper-based amorphous Ga2O3 solar-blind photodetector with improved flexibility and stability","authors":"Hanchi Xia, Tao Zhang, Yuehui Wang, Yaping Qi, Fan Zhang, Zhenping Wu, Yang Zhang","doi":"10.3788/col202321.101601","DOIUrl":"https://doi.org/10.3788/col202321.101601","url":null,"abstract":"Flexible devices provide advantages such as conformability, portability, and low cost. Paper-based electronics offers a number of advantages for many applications. It is lightweight, inexpensive, and biodegradable, making it an ideal choice for disposable electronics. In this work, we propose a novel configuration of photodetectors using paper as flexible substrates and amorphous Ga2O3 as the active materials, respectively. The photoresponse characteristics are investigated systematically. A decent responsivity yield and a specific detectivity of up to 66 mA/W and 3×1012 Jones were obtained at a low operating voltage of 10 V. The experiments also demonstrate that neither the twisting nor bending deformation can bring obvious performance degradation to the device. This work presents a candidate strategy for the application of conventional paper substrates to low-cost flexible solar-blind photodetectors, showing the potential of being integrated with other materials to create interactive flexible circuits.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136207199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Measurement of molecular alignment with deep learning-based M-XFROG technique 基于深度学习的M-XFROG技术的分子定位测量
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.120021
Wanchen Tao, Siqi Sun, Lixin He, Yanqing He, Jianchang Hu, Yu Deng, Chengqing Xu, Pengfei Lan, Peixiang Lu
{"title":"Measurement of molecular alignment with deep learning-based M-XFROG technique","authors":"Wanchen Tao, Siqi Sun, Lixin He, Yanqing He, Jianchang Hu, Yu Deng, Chengqing Xu, Pengfei Lan, Peixiang Lu","doi":"10.3788/col202321.120021","DOIUrl":"https://doi.org/10.3788/col202321.120021","url":null,"abstract":"We demonstrate a deep-learning neural network (DNN) method for the measurement of molecular alignment by using the molecular-alignment-based cross-correlation polarization-gating frequency resolved optical gating (M-XFROG) technique. Our network has the capacity for direct measurement of molecular alignment from the FROG traces. In a proof-of-principle experiment, we have demonstrated our method in O2 molecules. With our method, the molecular alignment factor ⟨cos2 θ⟩(t) of O2, impulsively excited by a pump pulse, was directly reconstructed. The accuracy and validity of the reconstruction have been verified by comparison with the simulations based on experimental parameters.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136259385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal 利用环形晶体的高分辨率Mo Kα x射线单色背光成像
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.103401
Haoxuan Si, Lianqiang Shan, Huiyao Du, Li Jiang, Shengzhen Yi, Weimin Zhou, Zhanshan Wang
{"title":"High-resolution Mo Kα X-ray monochromatic backlight imaging using a toroidal crystal","authors":"Haoxuan Si, Lianqiang Shan, Huiyao Du, Li Jiang, Shengzhen Yi, Weimin Zhou, Zhanshan Wang","doi":"10.3788/col202321.103401","DOIUrl":"https://doi.org/10.3788/col202321.103401","url":null,"abstract":"Curved crystal imaging is an important means of plasma diagnosis. Due to the short wavelengths of high-energy X rays and the fixed lattice constant of the spherical crystal, it is difficult to apply the spherical crystal in high-energy X-ray imaging. In this study, we have developed a high-energy, high-resolution X-ray imager based on a toroidal crystal that can effectively correct astigmatism. We prepared a Ge 〈5 1 1〉 toroidal crystal for backlighting Mo Kα1 characteristic lines (∼17.48 keV) and verified its high-resolution imaging ability in high-energy X-ray region, achieving a spatial resolution of 5–10 µm in a field of view larger than 1.0 mm.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135181733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 2
50 m/187.5 Mbit/s real-time underwater wireless optical communication based on optical superimposition 基于光叠加的50m /187.5 Mbit/s实时水下无线光通信
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.020601
Yongxin Cheng, Xingqi Yang, Yufan Zhang, Chao Zhang, Hao Zhang, Zhijian Tong, Yizhan Dai, Weichao Lü, Xin Li, Haiwu Zou, Zejun Zhang, Jing Xu
{"title":"50 m/187.5 Mbit/s real-time underwater wireless optical communication based on optical superimposition","authors":"Yongxin Cheng, Xingqi Yang, Yufan Zhang, Chao Zhang, Hao Zhang, Zhijian Tong, Yizhan Dai, Weichao Lü, Xin Li, Haiwu Zou, Zejun Zhang, Jing Xu","doi":"10.3788/col202321.020601","DOIUrl":"https://doi.org/10.3788/col202321.020601","url":null,"abstract":"In this paper, an optical pulse amplitude modulation with 4 levels (PAM-4) using a fiber combiner is proposed to enhance the data rate of a field-programmable gate-array-based long-distance real-time underwater wireless optical communication system. Two on – off keying signals with different amplitudes are used to modulate two pigtailed laser diodes, respectively, and the generated optical signals are superimposed into optical PAM-4 signals by a fiber combiner. The optical PAM-4 scheme can effectively alleviate the nonlinearity, although it reduces the peak-to-peak value of the emitting optical power by 25%. A real-time data rate of 187.5 Mbit/s is achieved by using the optical PAM-4 with a transmission distance of 50 m. The data rate is increased by about 25% compared with the conventional electrical PAM-4 in the same condition.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73542376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 1
Highly sensitive torsion sensor based on Mach–Zehnder interference in helical seven-core fiber taper 基于Mach-Zehnder干涉的螺旋七芯光纤锥度高灵敏度扭矩传感器
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.041205
Jiabin Wang, Xinzhe Zeng, Jian Zhou, Jiayu Hao, Xing-yu Yang, Yue Liu, Wenhuan Chen, Song Li, Yunxiang Yan, Tao Geng, Weimin Sun, Libo Yuan
{"title":"Highly sensitive torsion sensor based on Mach–Zehnder interference in helical seven-core fiber taper","authors":"Jiabin Wang, Xinzhe Zeng, Jian Zhou, Jiayu Hao, Xing-yu Yang, Yue Liu, Wenhuan Chen, Song Li, Yunxiang Yan, Tao Geng, Weimin Sun, Libo Yuan","doi":"10.3788/col202321.041205","DOIUrl":"https://doi.org/10.3788/col202321.041205","url":null,"abstract":"","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75446727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 1
Experimental realization of strong coupling between a cold atomic ensemble and an optical fiber microcavity 冷原子系综与光纤微腔强耦合的实验实现
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.092702
Li Li, Yu Pan, Yi-Jia Liu, Xiaoping Zhou, Dongfei Huang, Zehao Shen, Jian Wang, Chuan‐Feng Li, G. Guo
{"title":"Experimental realization of strong coupling between a cold atomic ensemble and an optical fiber microcavity","authors":"Li Li, Yu Pan, Yi-Jia Liu, Xiaoping Zhou, Dongfei Huang, Zehao Shen, Jian Wang, Chuan‐Feng Li, G. Guo","doi":"10.3788/col202321.092702","DOIUrl":"https://doi.org/10.3788/col202321.092702","url":null,"abstract":"Cavity quantum electrodynamics (QED) system is a promising platform for quantum optics and quantum information experiments. And its core is the strong coupling between atoms and optical cavity, which causes difficulty in the overlap for the atoms and the antinode of optical cavity mode. Here, we use a programmable movable optical dipole trap to load a cold atomic ensemble into an optical fiber microcavity and realize the strong coupling between the atoms and the optical cavity in which the coupling strength can be improved by polarization gradient cooling and adiabatic loading. By the measurement of vacuum Rabi splitting, the coupling strength can be as high as g N = 2 π × 400 MHz, which means the effective atom number is N ef f = 16 and the collective cooperativity is C N = 1466. These results show this experimental system can be used for cold atomic ensemble and cold molecule based cavity QED research.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75628455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Cascaded metasurface for separated information encryption [Invited] 用于分离信息加密的级联元表面[特邀]
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.020003
Jiahao Wang, Guodong Zhu, Weiguo Zhang, Zhou Zhou, Zile Li, Guoxing Zheng
{"title":"Cascaded metasurface for separated information encryption [Invited]","authors":"Jiahao Wang, Guodong Zhu, Weiguo Zhang, Zhou Zhou, Zile Li, Guoxing Zheng","doi":"10.3788/col202321.020003","DOIUrl":"https://doi.org/10.3788/col202321.020003","url":null,"abstract":"","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74778668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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: 2
Sideband-free dispersion-managed Yb-doped mode-locked fiber laser with Gires–Tournois interferometer mirrors 带Gires-Tournois干涉仪反射镜的无边带色散管理掺镱锁模光纤激光器
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.061401
Aoran Feng, Bowen Liu, Dongyu Yan, Genyu Bi, Youjian Song, Minglie Hu
{"title":"Sideband-free dispersion-managed Yb-doped mode-locked fiber laser with Gires–Tournois interferometer mirrors","authors":"Aoran Feng, Bowen Liu, Dongyu Yan, Genyu Bi, Youjian Song, Minglie Hu","doi":"10.3788/col202321.061401","DOIUrl":"https://doi.org/10.3788/col202321.061401","url":null,"abstract":"Aoran Feng (丰傲然), Bowen Liu (刘博文), Dongyu Yan (闫东钰), Genyu Bi (毕根毓), Youjian Song (宋有建), and Minglie Hu (胡明列) 1 Ultrafast Laser Laboratory, Key Laboratory of Opto-electronic Information Technology (Ministry of Education), School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, China 2 Georgia Tech Shenzhen Institute, Tianjin University, Shenzhen 518055, China 3 Optoelectronic Detection and Processing Laboratory, School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, China","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74333578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
Photonics 60 GBaud PDM-16QAM fiber-wireless 2 × 2 MIMO delivery at THz-band 光子学60 GBaud PDM-16QAM光纤无线2 × 2 MIMO传输在太赫兹波段
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.073901
Weiping Li, Jianjun Yu, Bowen Zhu, Jiao Zhang, M. Zhu, Chen Wang, Wen Zhou, Tangyao Xie, Jianguo Yu, F. Zhao
{"title":"Photonics 60 GBaud PDM-16QAM fiber-wireless 2 × 2 MIMO delivery at THz-band","authors":"Weiping Li, Jianjun Yu, Bowen Zhu, Jiao Zhang, M. Zhu, Chen Wang, Wen Zhou, Tangyao Xie, Jianguo Yu, F. Zhao","doi":"10.3788/col202321.073901","DOIUrl":"https://doi.org/10.3788/col202321.073901","url":null,"abstract":",","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":null,"pages":null},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72795357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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
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