Applied Physics B最新文献_第8页

Characterization of ultra-intense laser focal spot parameters based on laser accelerated electrons 基于激光加速电子的超强激光焦斑参数表征

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-10 DOI: 10.1007/s00340-025-08487-y

Bo Xie

引用次数: 0

Influence of photoexcited and thermal electrons and holes on generation of THz radiation in InAs in magnetic field 光激发态和热电子及空穴对磁场中InAs中太赫兹辐射产生的影响

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-09 DOI: 10.1007/s00340-025-08497-w

Vyacheslav E. Grishkov, Sergey A. Uryupin

{"title":"Influence of photoexcited and thermal electrons and holes on generation of THz radiation in InAs in magnetic field","authors":"Vyacheslav E. Grishkov, Sergey A. Uryupin","doi":"10.1007/s00340-025-08497-w","DOIUrl":"10.1007/s00340-025-08497-w","url":null,"abstract":"<div><p>The theoretical description of THz radiation generation when InAs placed in a magnetic field and exposed to a femtosecond pulse is proposed. It is found that at moderate photoexcitation level of InAs, for the correct description of THz radiation generation, along with photoexcited particles, it is necessary to take into account the influence of thermal electrons and holes on the semiconductor dielectric permittivity. The contribution of electrons, light, heavy and split-off holes to the THz radiation generation is described in detail. If the cyclotron frequency of electrons <span>(Omega _e)</span> does not exceed their plasma frequency <span>(omega _{pe})</span>, the generated pulse contains oscillations at frequencies close to the frequencies <span>(omega _{pm })</span>, determining at small collision frequencies the lower and upper boundaries of the semiconductor transparency region in the magnetic field. If <span>(Omega _e)</span> is greater than <span>(omega _{pe})</span>, the oscillations at the frequency <span>(omega _{+})</span> remain, and the oscillations at the frequency <span>(omega _{-})</span> are suppressed due to the influence of heavy holes.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163989","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

Experimental study and 3-D multiphysics modeling of a diode-pumped alkali vapor amplifier 二极管抽运碱蒸气放大器的实验研究及三维多物理场建模

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-08 DOI: 10.1007/s00340-025-08494-z

Huizi Zhao, Rui Wang, Zining Yang, Weiqiang Yang, Hongyan Wang, Weihong Hua, Xiaojun Xu

引用次数: 0

A near-infrared transformer fault gases C2H4/CH4 sensor based on aliasing spectra decoupling model with eigenvalues extraction 基于混叠光谱解耦模型和特征值提取的近红外变压器故障气体C2H4/CH4传感器

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-05 DOI: 10.1007/s00340-025-08492-1

Guolin Li, Longju Li, Jiarui Li, Yingjie Zhao, Ruixiang Sun, Haoran Yuan, Guangzhao Cui, Jianyu Gu, Jinxu Yang, Wenxuan Zhao, Xin Zhang

{"title":"A near-infrared transformer fault gases C2H4/CH4 sensor based on aliasing spectra decoupling model with eigenvalues extraction","authors":"Guolin Li, Longju Li, Jiarui Li, Yingjie Zhao, Ruixiang Sun, Haoran Yuan, Guangzhao Cui, Jianyu Gu, Jinxu Yang, Wenxuan Zhao, Xin Zhang","doi":"10.1007/s00340-025-08492-1","DOIUrl":"10.1007/s00340-025-08492-1","url":null,"abstract":"<div><p>A C<sub>2</sub>H<sub>4</sub>/CH<sub>4</sub> two-component synchronous monitoring sensor based on aliasing spectra decoupling model is designed. The distributed feedback (DFB) laser with the central wavelength of 1626 nm and the multi-pass gas cell (MPGC) with an effective optical path of 20 m are integrated into the sensor. The aliasing spectra decoupling model effectively decouples second harmonic (2f) signals, and its decoupling performance is validated through carrying out concentration monitoring experiments of mixed gases C<sub>2</sub>H<sub>4</sub> and CH<sub>4</sub>, where the concentration range of C<sub>2</sub>H<sub>4</sub> is 4–100 ppm and the CH<sub>4</sub> is 20–500 ppm. Under the background of severe aliasing of C<sub>2</sub>H<sub>4</sub> and CH<sub>4</sub> absorption lines, the sensor can still achieve high-precision inversion of each single gas. Among them, the root-mean-square error (RMSE) of C<sub>2</sub>H<sub>4</sub> is 0.7491 ppm, while for CH<sub>4</sub> it is 10.4028 ppm. In comparison to the least squares method, the precision of concentration inversion is significantly enhanced. This indicates that the aliasing spectra decoupling model is capable of mitigating the impact of aliasing absorption lines on the accuracy of concentration inversion.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162644","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

Dicke narrowing assisted atomic waveguide: achieving high-contrast and narrow core Dicke窄化辅助原子波导：实现高对比度和窄芯

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-05 DOI: 10.1007/s00340-025-08488-x

Nawaz Sarif Mallick

引用次数: 0

9.3 W continuous-wave intracavity frequency-doubled Pr:YLF laser at 320 nm pumped by fiber-coupled GaN blue laser diodes 9.3光纤耦合GaN蓝色激光二极管泵浦的320 nm腔内连续波倍频Pr:YLF激光器

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-05 DOI: 10.1007/s00340-025-08495-y

Na Niu, Shuangshuang Pu, Wei Dou, Fang Ma, Yijing Fang, Wenlong Shi, Quan Zheng

引用次数: 0

Analysis of splitting direction for coupling WGM resonators 耦合WGM谐振器劈裂方向分析

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-04 DOI: 10.1007/s00340-025-08501-3

Jianwei Wang, Jiapeng Sun, Yeshuai Song, Xulong Yang, Xinghua Yang, Yu Zhang, Zhihai Liu, Hanyang Li

{"title":"Analysis of splitting direction for coupling WGM resonators","authors":"Jianwei Wang, Jiapeng Sun, Yeshuai Song, Xulong Yang, Xinghua Yang, Yu Zhang, Zhihai Liu, Hanyang Li","doi":"10.1007/s00340-025-08501-3","DOIUrl":"10.1007/s00340-025-08501-3","url":null,"abstract":"<div><p>Opposite splitting directions in mode splitting are observed in whispering gallery mode resonators, composed of asymmetrically coupled bispheres. To interpret this phenomenon, we introduce a “virtual ellipsoid” model, which establishes a direct correlation between the optical behavior of bispheres and that of ellipsoidal resonators. The splitting characteristics, including intensity difference and wavelength separation, are systematically investigated through theoretical analysis and experimental validation. These findings demonstrate that the splitting direction is governed by the relative positions of the fundamental and azimuthal modes within the splitting peaks. Experimental results further confirm that an increase in the diameter of Sphere D<sub>2</sub> leads to a redshift in the resonant wavelength, attributed to the extended optical path in the whispering gallery mode. Additionally, we propose an optical barcode approach based on the transmission spectra to intuitively characterize the optical features of splitting peaks, offering potential applications in size measurement of microspheres or ellipsoids, as well as optical information identification.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161641","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

Atomic excited-state Faraday anomalous dispersion optical filter in the reflection configuration 反射结构中的原子激发态法拉第反常色散滤光片

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-04 DOI: 10.1007/s00340-025-08500-4

Baodong Yang, Keru Zang, Hanshuai Zhao, Haitao Zhou, Jun He, Junmin Wang

{"title":"Atomic excited-state Faraday anomalous dispersion optical filter in the reflection configuration","authors":"Baodong Yang, Keru Zang, Hanshuai Zhao, Haitao Zhou, Jun He, Junmin Wang","doi":"10.1007/s00340-025-08500-4","DOIUrl":"10.1007/s00340-025-08500-4","url":null,"abstract":"<div><p>An excited-state Faraday anomalous dispersion optical filter (ES-FADOF) operating in a reflection configuration at a wavelength of 917 nm is experimentally demonstrated based on the cesium (<sup>133</sup>Cs) 6S<sub>1/2</sub> → 6P<sub>3/2</sub> → 6D<sub>5/2</sub> (852 nm + 917 nm) ladder-type atomic system. The 852 nm laser acts as the pump light populating Cs atoms from the 6S<sub>1/2</sub> ground state to the 6P<sub>3/2</sub> intermediate state, while the frequency of 917 nm laser as the signal light is scanned across the 6P<sub>3/2</sub> → 6D<sub>5/2</sub> transition, so an ES-FADOF spectral signal is obtained. Experimental results show that the performance of ES-FADOF remains nearly identical whether the pump and signal light beams are co-propagating or counter-propagating within the atomic vapor cell. Building on this observation, a reflection-type ES-FADOF is achieved for the first time, which allows signal light to pass through the atomic medium twice round trip, doubling the effective length of the vapor cell, so its peak transmission is obviously improved compared to popular ES-FADOF, where the signal light beam passes through the atomic vapor only once. This technique can be applied to the other FADOF systems, especially suitable for atomic media with high melting points.</p></div>","PeriodicalId":474,"journal":{"name":"Applied Physics B","volume":"131 7","pages":""},"PeriodicalIF":2.0,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162045","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

Frequency resolved imaging by laser filament THz emission 激光细丝太赫兹发射频率分辨成像

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-04 DOI: 10.1007/s00340-025-08491-2

Leonid Seleznev, Georgy Rizaev

引用次数: 0

Few-ns and kW-peak-power red laser of Pr: YLF with adjustable repetition rate 重复频率可调的Pr: YLF红色激光器，峰值功率为几ns和kw

IF 2 3区物理与天体物理

Applied Physics B Pub Date : 2025-06-04 DOI: 10.1007/s00340-025-08493-0

Jinyan Wang, Quan Zheng, Xiaohua Wang, Xi Chen, Qi Li, Shijie Li

引用次数: 0