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Generation of tunable superchiral spot in metal-insulator-metal waveguide 金属-绝缘体-金属波导中可调谐超手性光斑的产生
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.013601
T. Zhuang, Hai Hu, Q. Zhan
{"title":"Generation of tunable superchiral spot in metal-insulator-metal waveguide","authors":"T. Zhuang, Hai Hu, Q. Zhan","doi":"10.3788/col202321.013601","DOIUrl":"https://doi.org/10.3788/col202321.013601","url":null,"abstract":"The chiral feature of an optical field can be evaluated by the parameter of g-factor enhancement, which is helpful to enhance chiroptic signals from a chiral dipole. In this work, the superchiral spot has been theoretically proposed in metal-insulator-metal waveguides. The g-factor enhancement of the superchiral spot can be enhanced by 67-fold more than that of circularly polarized light, and the spot is confined in the deep wavelength scale along each spatial dimension. Moreover, the position of the superchiral spot can be tuned by manipulating the incident field. The tunable superchiral spot may find applications in chiral imaging and sensing.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"81 1 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80607870","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
Recent advances in optical fiber high-temperature sensors and encapsulation technique [Invited] 光纤高温传感器及封装技术研究进展[特邀]
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.090007
文� �, 强 �, 建桥 �, 振丞 王, 洋 于, 洲 孟
{"title":"Recent advances in optical fiber high-temperature sensors and encapsulation technique [Invited]","authors":"æ–‡æ�° å¾�, 强 å�ž, 建桥 æ¢�, 振丞 王, æ´‹ 于, æ´² å­Ÿ","doi":"10.3788/col202321.090007","DOIUrl":"https://doi.org/10.3788/col202321.090007","url":null,"abstract":"In the aerospace field, for aerospace engines and other high-end manufacturing equipment working in extreme environments, like ultrahigh temperatures, high pressure, and high-speed airflow, in situ temperature measurement is of great importance for improving the structure design and achieving the health monitoring and the fault diagnosis of critical parts. Optical fiber sensors have the advantages of small size, easy design, corrosion resistance, anti-electromagnetic interference, and the ability to achieve distributed or quasi-distributed sensing and have broad application prospects for temperature sensing in extreme environments. In this review, first, we introduce the current research status of fiber Bragg grating-type and Fabry–Perot interferometer-type high-temperature sensors. Then we review the optical fiber high-temperature sensor encapsulation techniques, including tubular encapsulation, substrate encapsulation, and metal-embedded encapsulation, and discuss the extreme environmental adaptability of different encapsulation structures. Finally, the critical technological issues that need to be solved for the application of optical fiber sensors in extreme environments are discussed.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135600391","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
Comparison of optical properties of bioaerosols composed of microbial spores and hyphae [Invited] 微生物孢子与菌丝组成的生物气溶胶光学性质比较[特邀]
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.090006
新宇 王, 以� 胡, 星 �, 有林 顾, 海浩 何, 婉莹 �, � 王
{"title":"Comparison of optical properties of bioaerosols composed of microbial spores and hyphae [Invited]","authors":"新宇 王, 以å�Ž 胡, 星 æ�¨, 有林 顾, 海浩 何, 婉莹 ä¸�, é¹� 王","doi":"10.3788/col202321.090006","DOIUrl":"https://doi.org/10.3788/col202321.090006","url":null,"abstract":"Bioaerosols exhibit significant broadband extinction performance and have vital impacts on climate change, optical detection, communication, disease transmission, and the development of optical attenuation materials. Microbial spores and microbial hyphae represent two primary forms of bioaerosol particles. However, a comprehensive investigation and comparison of their optical properties have not been conducted yet. In this paper, the spectra of spores and hyphae were tested, and the absorption peaks, component contents, and protein structural differences were compared. Accurate structural models were established, and the optical attenuation parameters were calculated. Aerosol chamber experiments were conducted to verify the optical attenuation performance of microbial spores and hyphae in the mid-infrared and far-infrared spectral bands. Results demonstrate that selecting spores and hyphae can significantly reduce the average transmittance from 21.2% to 6.4% in the mid-infrared band and from 31.3% to 19.6% in the far-infrared band within three minutes. The conclusions have significant implications for the selection of high-performance microbial optical attenuation materials as well as for the rapid detection of bioaerosol types in research on climate change and the spread of pathogenic aerosols.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135600392","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
Core-antiresonance-based terahertz cavities and applications [Invited] 基于核反共振的太赫兹空腔及其应用[特邀]
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.110005
Yongpeng Han, Yangjun Mei, Chang Liu, Li Lao, Yao Yao, Jiahao Xiao, Jiayu Zhao, Yan Peng
{"title":"Core-antiresonance-based terahertz cavities and applications [Invited]","authors":"Yongpeng Han, Yangjun Mei, Chang Liu, Li Lao, Yao Yao, Jiahao Xiao, Jiayu Zhao, Yan Peng","doi":"10.3788/col202321.110005","DOIUrl":"https://doi.org/10.3788/col202321.110005","url":null,"abstract":"This work presents a brief review of our recent research on an antiresonant mechanism named core antiresonant reflection (CARR), which leads to a broadband terahertz (THz) spectrum output with periodic dips at resonant frequencies after its transmission along a hollow-core tubular structure (e.g., a paper tube). The CARR theory relies only on parameters of the tube core (e.g., the inner diameter) rather than the cladding, thus being distinct from existing principles such as the traditional antiresonant reflection inside optical waveguides (ARROWs). We demonstrate that diverse tubular structures, including cylindrical, polyhedral, spiral, meshy, and notched hollow tubes with either transparent or opaque cladding materials, as well as a thick-walled hole, could indeed become CARR-type resonators. Based on this CARR effect, we also perform various applications, such as pressure sensing with paper-folded THz cavities, force/magnetism-driven chiral polarization modulations, and single-pulse measurements of the angular dispersion of THz beams. In future studies, the proposed CARR method promises to support breakthroughs in multiple fields by means of being extended to more kinds of tubular entities for enhancing their interactions with light waves in an antiresonance manner.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135612367","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
Femtosecond laser filamentation in simulated atmospheric turbulence [Invited] 模拟大气湍流中的飞秒激光细丝[特邀]
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.110004
Jiewei Guo, Lu Sun, Yuezheng Wang, Jiayun Xue, Zhi Zhang, Haiyi Liu, Shishi Tao, Wenqi Qian, Pengfei Qi, Lie Lin, Weiwei Liu
{"title":"Femtosecond laser filamentation in simulated atmospheric turbulence [Invited]","authors":"Jiewei Guo, Lu Sun, Yuezheng Wang, Jiayun Xue, Zhi Zhang, Haiyi Liu, Shishi Tao, Wenqi Qian, Pengfei Qi, Lie Lin, Weiwei Liu","doi":"10.3788/col202321.110004","DOIUrl":"https://doi.org/10.3788/col202321.110004","url":null,"abstract":"The effects of turbulence intensity and turbulence region on the distribution of femtosecond laser filaments are experimentally elaborated. Through the ultrasonic signals emitted by the filaments, it is observed that increasing turbulence intensity and an expanding turbulence active region cause an increase in the start position of the filament and a decrease in filament length, which can be well explained by theoretical calculation. It is also observed that the random perturbation of the air refractive index caused by atmospheric turbulence expands the spot size of the filament. Additionally, when the turbulence refractive index structure constant reaches 8.37×10-12 m-2/3, multiple filaments are formed. Furthermore, the standard deviation of the transverse displacement of filament is found to be proportional to the square root of the turbulent structure constant under the experimental turbulence parameters in this paper. These results contribute to the study of femtosecond laser propagation mechanisms in complex atmospheric turbulence conditions.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135612368","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
Polarization domains and self-mode-locked pulses in an erbium-doped fiber laser 掺铒光纤激光器的偏振域和自锁模脉冲
2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.031402
Peiyun Cheng, Mengmeng Han, Yueqing Du, Xuewen Shu
{"title":"Polarization domains and self-mode-locked pulses in an erbium-doped fiber laser","authors":"Peiyun Cheng, Mengmeng Han, Yueqing Du, Xuewen Shu","doi":"10.3788/col202321.031402","DOIUrl":"https://doi.org/10.3788/col202321.031402","url":null,"abstract":"We have observed various polarization domains and a giant self-mode-locked pulse in a 130 m long erbium-doped fiber laser without any mode-locking devices. By adjusting the intracavity polarization controller, we investigated the evolution process of the polarization domain with the varying cavity birefringence. When the birefringence was close to zero, the polarization domains split into multidomains, and finally a giant self-mode-locked pulse formed for the first time. We analyzed that the generation of the self-mode-locked pulse was related to the multiple subdomains ascribed to the strong coherent cross coupling between the orthogonal polarization light components in the long fiber cavity.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"254 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136367403","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
On-chip ultraviolet second-harmonic generation in lithium-tantalate thin film microdisk 钽酸锂薄膜微磁盘片上紫外线二次谐波的产生
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.061902
Miao Xue, Xiongshuo Yan, Jiangwei Wu, Rui Ge, Tingge Yuan, Yuping Chen, Xianfeng Chen
{"title":"On-chip ultraviolet second-harmonic generation in lithium-tantalate thin film microdisk","authors":"Miao Xue, Xiongshuo Yan, Jiangwei Wu, Rui Ge, Tingge Yuan, Yuping Chen, Xianfeng Chen","doi":"10.3788/col202321.061902","DOIUrl":"https://doi.org/10.3788/col202321.061902","url":null,"abstract":"The compact and reliable ultraviolet (UV) source has attracted remarkable attention for its potential use in optical measurement systems, high-density optical storage, and biomedical applications. We demonstrate ultraviolet generation by frequency doubling in a lithium-tantalate-on-insulator (LTOI) microdisk via modal phase matching. The 50-μ m-diameter microdisk was milled by a focused ion beam (FIB) and followed by chemo-mechanical polishing (CMP) to smooth the disk surface and edge, and the Q-factor reaches 2.74 × 10 5 in the visible band. On-chip UV coherent light with a wavelength of 384.3 nm was achieved, which shows great promise for using LTOIs in integrated ultraviolet source platforms.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"12 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84804805","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
Rapid classification of copper concentrate by portable laser-induced breakdown spectroscopy combined with transfer learning and deep convolutional neural network 结合迁移学习和深度卷积神经网络的便携式激光诱导击穿光谱技术对铜精矿进行快速分类
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.043001
Haochen Li, Tianyuan Liu, Yuchao Fu, Wanxiang Li, Meng Zhang, Xi Yang, Di Song, Jiaqi Wang, You Wang, Mei-Ling Huang
{"title":"Rapid classification of copper concentrate by portable laser-induced breakdown spectroscopy combined with transfer learning and deep convolutional neural network","authors":"Haochen Li, Tianyuan Liu, Yuchao Fu, Wanxiang Li, Meng Zhang, Xi Yang, Di Song, Jiaqi Wang, You Wang, Mei-Ling Huang","doi":"10.3788/col202321.043001","DOIUrl":"https://doi.org/10.3788/col202321.043001","url":null,"abstract":"","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"11 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86060899","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
Phase dependence of third-order harmonic generation in gases induced by two-color laser field 双色激光场诱导气体中三阶谐波产生的相位依赖性
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.050201
C. Meng, Pan Song, Zhi-Hui Lyu, Xiaowei Wang, Dong-Wen Zhang, Zengxiu Zhao, J. Yuan
{"title":"Phase dependence of third-order harmonic generation in gases induced by two-color laser field","authors":"C. Meng, Pan Song, Zhi-Hui Lyu, Xiaowei Wang, Dong-Wen Zhang, Zengxiu Zhao, J. Yuan","doi":"10.3788/col202321.050201","DOIUrl":"https://doi.org/10.3788/col202321.050201","url":null,"abstract":"","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"32 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72921435","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
Nonlinearity-induced localization enhancement in Fibonacci-like waveguide arrays [Invited] 非线性诱导的类斐波那契波导阵列的局部化增强[应邀]
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.101301
Li-Cheng Wang, Hongfei Bu, Yang Chen, Zhen-Nan Tian, Xifeng Ren
{"title":"Nonlinearity-induced localization enhancement in Fibonacci-like waveguide arrays [Invited]","authors":"Li-Cheng Wang, Hongfei Bu, Yang Chen, Zhen-Nan Tian, Xifeng Ren","doi":"10.3788/col202321.101301","DOIUrl":"https://doi.org/10.3788/col202321.101301","url":null,"abstract":"Based on the one-dimensional periodic and Fibonacci-like waveguide arrays","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"85 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75305059","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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