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Nonlinear harmonic generation of terahertz waves in a topological valley polaritonic microcavity 拓扑谷极化微腔中太赫兹波的非线性谐波产生
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.081901
Yao Lu, H. Xiong, Yibo Huang, Qiang Wu, Jiwei Qi, Chongpei Pan, Jingjun Xu
{"title":"Nonlinear harmonic generation of terahertz waves in a topological valley polaritonic microcavity","authors":"Yao Lu, H. Xiong, Yibo Huang, Qiang Wu, Jiwei Qi, Chongpei Pan, Jingjun Xu","doi":"10.3788/col202321.081901","DOIUrl":"https://doi.org/10.3788/col202321.081901","url":null,"abstract":"Compact terahertz (THz) devices, especially for nonlinear THz components, have received more and more attention due to their potential applications in THz nonlinearity-based sensing, communications, and computing devices. However, effective means to enhance, control, and confine the nonlinear harmonics of THz waves remain a great challenge for micro-scale THz nonlinear devices. In this work, we have established a technique for nonlinear harmonic generation of THz waves based on phonon polariton-enhanced giant THz nonlinearity in a 2D-topologically protected valley photonic microcavity. Effective THz harmonic generation has been observed in both noncentrosymmetric and centrosymmetric nonlinear materials. These results can provide a valuable reference for the generation and control of THz high-harmonics, thus developing new non-linear devices in the THz regime.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"20 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84755447","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
Thickness dependency of nonlinear optical properties in ITO/Sn composite films ITO/Sn复合薄膜非线性光学特性的厚度依赖性
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.081902
Boyang Nan, R. Hong, Chunxian Tao, Qi Wang, Hui Lin, Zhaoxia Han, Dawei Zhang
{"title":"Thickness dependency of nonlinear optical properties in ITO/Sn composite films","authors":"Boyang Nan, R. Hong, Chunxian Tao, Qi Wang, Hui Lin, Zhaoxia Han, Dawei Zhang","doi":"10.3788/col202321.081902","DOIUrl":"https://doi.org/10.3788/col202321.081902","url":null,"abstract":"In this study, a batch of indium tin oxide (ITO)/Sn composites with different ratios was obtained based on the principle of thermal evaporation by an electron beam. The crystalline structure, surface shape, and optical characterization of the films were researched using an X-ray diffractometer, an atomic force microscope, a UV-Vis-NIR dual-beam spectrophotometer, and an open-hole Z-scan system. By varying the relative thickness ratio of the ITO/Sn bilayer film, tunable nonlinear optical properties were achieved. The nonlinear saturation absorption coefficient β maximum of the ITO/Sn composites is − 10.5 × 10 − 7 cm = W, approximately 21 and 1.72 times more enhanced compared to monolayer ITO and Sn, respectively. Moreover, the improvement of the sample nonlinear performance was verified using finite-difference in temporal domain simulations.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"346 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79658656","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
Generation of 1.3/1.4 µm random fiber laser by bismuth-doped phosphosilicate fiber 掺铋磷硅酸盐光纤制备1.3/1.4µm随机光纤激光器
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.071401
Hang Wang, Wencheng Jia, Yongjia Yao, Xinyun Yang, M. Melkumov, S. Firstov, A. Lobanov, Zhipeng Dong, Zhengqian Luo
{"title":"Generation of 1.3/1.4 µm random fiber laser by bismuth-doped phosphosilicate fiber","authors":"Hang Wang, Wencheng Jia, Yongjia Yao, Xinyun Yang, M. Melkumov, S. Firstov, A. Lobanov, Zhipeng Dong, Zhengqian Luo","doi":"10.3788/col202321.071401","DOIUrl":"https://doi.org/10.3788/col202321.071401","url":null,"abstract":"We have successfully generated a 1.3/1.4 μ m random fiber laser (RFL) using bismuth (Bi)-doped phosphosilicate fiber. The Bi-doped RFL has shown excellent long-term operational stability with a standard deviation of approximately 0.34% over 1 h at a maximum output power of 549.30 mW, with a slope efficiency of approximately 29.21%. The Bi-doped phosphosilicate fiber offers an emission spectrum ranging from 1.28 to 1.57 μ m, indicating that it can be tuned within this band. Here, we demonstrated a wavelength-tuning fiber laser with a wavelength of 1.3/1.4 μ m, achieved through the using of a fiber Bragg grating or a tunable filter. Compared to traditional laser sources, the RFL reduces the speckle contrast of images by 11.16%. Due to its high stability, compact size, and high efficiency, this RFL is highly promising for use in biomedical imaging, communication, and sensor applications.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"9 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81687496","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
Watt-level laser operation of Pr3+:YLF at 696 and 698 nm Pr3+:YLF在696和698 nm处的瓦级激光操作
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.041404
Weihang Cao, Z. Dai, Run Fang, Z. Wang, Yuchen Xue, B. Xiao, Huiying Xu, Z. Cai
{"title":"Watt-level laser operation of Pr3+:YLF at 696 and 698 nm","authors":"Weihang Cao, Z. Dai, Run Fang, Z. Wang, Yuchen Xue, B. Xiao, Huiying Xu, Z. Cai","doi":"10.3788/col202321.041404","DOIUrl":"https://doi.org/10.3788/col202321.041404","url":null,"abstract":"","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"54 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78905130","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
2 kW random fiber laser based on hybrid Yb-Raman gain [Invited] 基于Yb-Raman混合增益的2kw随机光纤激光器[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/col202321.090004
Jieping Ye, Yang Zhang, Junrui Liang, Xiao Ma, Jiangming Xu, T. Yao, Jin-yong Leng, P. Zhou
{"title":"2 kW random fiber laser based on hybrid Yb-Raman gain [Invited]","authors":"Jieping Ye, Yang Zhang, Junrui Liang, Xiao Ma, Jiangming Xu, T. Yao, Jin-yong Leng, P. Zhou","doi":"10.3788/col202321.090004","DOIUrl":"https://doi.org/10.3788/col202321.090004","url":null,"abstract":"High-power operation is one of the most important research topics surrounding random fiber lasers (RDFLs). Here we optimized the cavity structure and proposed a new scheme based on hybrid gain to address the issue of high-power back-ward light in traditional kilowatt-level RDFLs. Consequently, a record power of 1972 W was achieved while the maximum backward leaked power only reached 0.12 W. The conversion efficiency relative to the laser diode pump power was 68.4%, and the highest spectral purity of the random lasing reached 98.1%. This work may provide a reference for high-power RDFLs, Raman fiber lasers, and long-wavelength Yb-doped fiber lasers.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"9 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83515688","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
Damage resistance of B4C reflective mirror irradiated by X-ray free-electron laser x射线自由电子激光辐照B4C反射镜的抗损伤性
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.023401
Jinyu Cao, Shuhui Li, Yajun Tong, Ming-Dou Tang, Wenbin Li, Qiushi Huang, Huaidong Jiang, Zhanshan Wang
{"title":"Damage resistance of B4C reflective mirror irradiated by X-ray free-electron laser","authors":"Jinyu Cao, Shuhui Li, Yajun Tong, Ming-Dou Tang, Wenbin Li, Qiushi Huang, Huaidong Jiang, Zhanshan Wang","doi":"10.3788/col202321.023401","DOIUrl":"https://doi.org/10.3788/col202321.023401","url":null,"abstract":"In this paper, a simple theoretical model combining Monte Carlo simulation with the enthalpy method is provided to simulate the damage resistance of B 4 C/Si-sub mirror under X-ray free-electron laser irradiation. Two different damage mechanisms are found, dependent on the photon energy. The optimum B 4 C film thickness is determined by studying the dependence of the damage resistance on the film thickness. Based on the optimized film thickness, the damage thresholds are simulated at photon energy of 0.4 – 25 keV and a grazing incidence angle of 2 mrad. It is recommended that the energy range around the Si K-edge should be avoided for safety reasons.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"2 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88284534","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
Azimuthal vector beam illuminating plasmonic tips circular cluster for surface-enhanced Raman spectroscopy 面向表面增强拉曼光谱的方位矢量光束照射等离子体尖端圆簇
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.033603
Lu Zhang, Chao Meng, Hao Yang, Wending Zhang
{"title":"Azimuthal vector beam illuminating plasmonic tips circular cluster for surface-enhanced Raman spectroscopy","authors":"Lu Zhang, Chao Meng, Hao Yang, Wending Zhang","doi":"10.3788/col202321.033603","DOIUrl":"https://doi.org/10.3788/col202321.033603","url":null,"abstract":"Noble metallic nanostructures with strong electric near-field enhancement can significantly improve the nanoscale light-matter interactions and are critical for high-sensitivity surface-enhanced Raman spectroscopy (SERS). Here, we use azimuthal vector beam (AVB) to illuminate the plasmonic tips circular cluster (PTCC) array to enhance the electric near-field intensity of the PTCC array, and then use it to improve SERS sensitivity. The PTCC array were prepared based on the self-assembled and Inductive Coupled Plasmon (ICP) etching methods. The calculation results show that, compared with linearly polarized beam (LPB) and radial vector beam (RVB) excitations, the AVB excitation can obtain stronger electric near-field enhancement due to the strong resonant responses formed in the nanogap between adjacent plasmonic tips. Subsequently, our experimental results proved that AVB excitation increased SERS sensitivity to 10 -13 M, which is 2 orders of magnitude higher than that of LPB excitation. Meanwhile, the PTCC array had excellent uniformity with Raman enhancement factor calculated to be ∼ 2.4× 10 8 . This kind of vector light field enhancing Raman spectroscopy may be applied in the field of sensing technologies, such as to the trace examination with ultra-low concentration.","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":"88424141","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
Stokes scintillations for vector beams in turbulence 湍流中矢量光束的斯托克斯闪烁
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.100101
Zhen-bao Dong, Bo Yuan, Yonglei Liu, Fei Wang, Y. Cai, Yahong Chen
{"title":"Stokes scintillations for vector beams in turbulence","authors":"Zhen-bao Dong, Bo Yuan, Yonglei Liu, Fei Wang, Y. Cai, Yahong Chen","doi":"10.3788/col202321.100101","DOIUrl":"https://doi.org/10.3788/col202321.100101","url":null,"abstract":"We introduce the Stokes scintillation indices and the corresponding overall Stokes scintillations for quantitatively studying the fluctuations of both the intensity and polarization of an optical vector beam transmitting through the atmospheric turbulence. With the aid of multiple-phase-screen method, we examine the Stokes fluctuations of a radially polarized beam in Kolmogorov turbulence numerically. The results show that the overall scintillation for the intensity distribution is always larger than the overall scintillations for the polarization-dependent Stokes parameters, which indicates that the polarization state of a vector beam is more stable than its intensity distribution in the turbulence. We interpret the results with the depolarization effect of the vector beam in turbulence. The findings in this work may be useful in free-space optical communications utilizing the vector beams.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"36 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86506058","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
Generation and application of high-contrast laser pulses using plasma mirror in the SULF-1PW beamline 等离子体反射镜在SULF-1PW光束线上的高对比度激光脉冲的产生和应用
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.043802
Cheng‐Jin Jiang, Zongxin Zhang, H. Dong, Zhiyong Shi, Jian-Bo He, Shufa Hao, Fengyu Sun, J. Gui, J. Qian, Jiacheng Zhu, Wenpeng Wang, Yi Xu, X. Liang, Y. Leng, Ruxin Li
{"title":"Generation and application of high-contrast laser pulses using plasma mirror in the SULF-1PW beamline","authors":"Cheng‐Jin Jiang, Zongxin Zhang, H. Dong, Zhiyong Shi, Jian-Bo He, Shufa Hao, Fengyu Sun, J. Gui, J. Qian, Jiacheng Zhu, Wenpeng Wang, Yi Xu, X. Liang, Y. Leng, Ruxin Li","doi":"10.3788/col202321.043802","DOIUrl":"https://doi.org/10.3788/col202321.043802","url":null,"abstract":"","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"35 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79788850","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
Vector bending sensor based on chirped long-period grating with off-axis micro-helix taper 基于离轴微螺旋锥啁啾长周期光栅的矢量弯曲传感器
IF 3.5 2区 物理与天体物理
Chinese Optics Letters Pub Date : 2023-01-01 DOI: 10.3788/col202321.060604
Jian Zhou, Xuelan He, Hongzhou Chen, Ziyang Xiong, Jing Yang, C. Guan, Libo Yuan
{"title":"Vector bending sensor based on chirped long-period grating with off-axis micro-helix taper","authors":"Jian Zhou, Xuelan He, Hongzhou Chen, Ziyang Xiong, Jing Yang, C. Guan, Libo Yuan","doi":"10.3788/col202321.060604","DOIUrl":"https://doi.org/10.3788/col202321.060604","url":null,"abstract":"Vector bending sensing has been consistently growing in many fields. A low-cost and high sensitivity vector bending sensor based on a chirped long-period fiber grating (LPFG) with an off-axis micro helix taper is proposed and experimentally demonstrated. The grating is composed of several sections of single-mode fiber with gradually larger lengths, and the off-axis micro helix tapers with fixed lengths when they are fabricated by using the arc discharge technology. The large refractive index modulation in the micro-helix taper greatly reduces the sensor size. The total length of the sensor is only 4.67 mm. The micro-helix taper-based LPFG can identify the bending direction due to the asymmetric structure introduced by the micro helix. The experimental results show that the transmission spectra of the sensor have distinct responses for different bending directions, and the maximum bending sensitivity is 14.08 nm/m − 1 in the range from 0.128 m − 1 to 1.28 m − 1 . The proposed bending sensor possesses pronounced advantages, such as high sensitivity, small size, low cost, and orientation identification, and offers a very promising method for bend measurement.","PeriodicalId":10293,"journal":{"name":"Chinese Optics Letters","volume":"27 1","pages":""},"PeriodicalIF":3.5,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73306863","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
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