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Quasi-classical theory of cyclotron resonance with accounting for dissipation 考虑耗散的回旋共振准经典理论
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-27 DOI: 10.1088/1612-202x/ad3628
S V Sazonov
{"title":"Quasi-classical theory of cyclotron resonance with accounting for dissipation","authors":"S V Sazonov","doi":"10.1088/1612-202x/ad3628","DOIUrl":"https://doi.org/10.1088/1612-202x/ad3628","url":null,"abstract":"Based on the quasi-classical version of the canonical Caldirola–Kanai quantization, non-relativistic cyclotron resonance in a dissipative medium is studied. The corresponding particle propagator in the coordinate representation is found. It is shown that the combined effect of dissipation and a constant magnetic field reduces to the suppression of the quantum properties of a charged particle. In turn, a time-varying electric field that causes cyclotron resonance does not exhibit similar properties and does not affect the uncertainties of the particle coordinates.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Fine structure of polarization and optical Möbius strips topology of laser light in planar metamaterial 平面超材料中激光的偏振精细结构和光学莫比乌斯带拓扑结构
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-27 DOI: 10.1088/1612-202x/ad3622
N Yu Kuznetsov, N N Potravkin, V A Makarov
{"title":"Fine structure of polarization and optical Möbius strips topology of laser light in planar metamaterial","authors":"N Yu Kuznetsov, N N Potravkin, V A Makarov","doi":"10.1088/1612-202x/ad3622","DOIUrl":"https://doi.org/10.1088/1612-202x/ad3622","url":null,"abstract":"It is shown that upon propagation of a plane linearly polarized harmonic wave normally incident on a planar nonlinear metamaterial whose basic cell consists of two rectangular silver plates with characteristic dimensions of hundreds of nanometers, there exists in the local field a circular polarization singularity line (<italic toggle=\"yes\">C</italic>-line) containing two regions where their segments come to each other to such small distance that it may appear as a self-intersection in the numerical experiment. We found that optical ribbons constructed around the ordinary points of these lines have the topology of Möbius ribbons, and the ribbons constructed in the possible self-intersection region of <italic toggle=\"yes\">C</italic>-lines and spanning its two segments are orientable surfaces.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Inducing torque on molecular magnets via Laguerre Gaussian beams 通过拉盖尔高斯束在分子磁体上诱导扭矩
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-27 DOI: 10.1088/1612-202x/ad3623
Gang Lei, Shanzhi Li
{"title":"Inducing torque on molecular magnets via Laguerre Gaussian beams","authors":"Gang Lei, Shanzhi Li","doi":"10.1088/1612-202x/ad3623","DOIUrl":"https://doi.org/10.1088/1612-202x/ad3623","url":null,"abstract":"This theoretical study delves into the induction of torque by light beams carrying orbital angular momentum on single-molecule magnets (SMMs). The investigation explores the impact of decay rates, detunings, and control field intensities on the generation of light-induced torque and the resulting current flow in a ring formation. The results highlight the crucial role of the control field, showcasing its efficacy as a tool to manipulate and amplify torque at different frequencies. Detuning is identified as a critical parameter influencing the shift, slope, and emergence of multiple peaks in the torque profile. The interplay between detuning, control field intensity, and decay rates introduces a control mechanism for fine-tuning torque at distinct probe frequencies. These findings underscore the potential applications of the control field and detuning as robust tools for tailored manipulation of torque in SMMs, paving the way for advancements in controlled current flow dynamics with ring structures.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Photodynamic processes for water and wastewater treatment: a review 用于水和废水处理的光动力工艺：综述
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-26 DOI: 10.1088/1612-202x/ad3438
Kamila Jessie Sammarro Silva, Alessandra Ramos Lima, Lucas Danilo Dias, Matheus Garbuio, Mariana de Souza, Thaila Quatrini Correa, Kate Cristina Blanco, Edgar Aparecido Sanches, Vanderlei Salvador Bagnato, Natalia Mayumi Inada
{"title":"Photodynamic processes for water and wastewater treatment: a review","authors":"Kamila Jessie Sammarro Silva, Alessandra Ramos Lima, Lucas Danilo Dias, Matheus Garbuio, Mariana de Souza, Thaila Quatrini Correa, Kate Cristina Blanco, Edgar Aparecido Sanches, Vanderlei Salvador Bagnato, Natalia Mayumi Inada","doi":"10.1088/1612-202x/ad3438","DOIUrl":"https://doi.org/10.1088/1612-202x/ad3438","url":null,"abstract":"Photodynamic therapy (PDT) has been widely employed in clinical applications, healthcare, and public health (e.g. cancer research, microbiological control, vector control, etc). The photodynamic action is an advanced oxidation process based on the production of reactive oxygen species (ROS) and singlet oxygen by the excitation of a photosensitizer by specific wavelengths of light in the presence of molecular oxygen. The generation of ROS, which are highly reactive, encourages the use of PDT against recalcitrant pollutants and resistant parasites, a novel approach for PDT applications. Here, we explored recent research in PDT in water and wastewater treatment, elucidating operational conditions, main targets, potentials, and constraints, considering a collection of scientific papers curated by a well-defined research strategy. Retrieved records were filtered by subjects, and data was organized into a content network. Results showed that PDT is a timely alternative to deal with emerging chemical contaminants, resistant microorganisms, and other challenges, raising opportunities for versatile applications and sustainable solutions. Advances in environmental applications of PDT may help reach the Sustainable Development Goal 6 (SDG 6), but also positively impact other SDGs.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
1.3 μm InAs/GaAs quantum-dot lasers grown on planar on-axis Si (001) substrates with high slope-efficiency and low differential resistance 在平面同轴硅 (001) 衬底上生长的 1.3 μm InAs/GaAs 量子点激光器具有高斜率效率和低差分电阻
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-25 DOI: 10.1088/1612-202x/ad3439
Feng Lin, Jun Wang, Hao Zhai, Shuaicheng Liu, Qing Ge, Yanan Chen, Chuanjiang Liu, Kaize Mao, Hao Liu, Yiming Bai, Qi Wang, Yongqing Huang, Xiaomin Ren
{"title":"1.3 μm InAs/GaAs quantum-dot lasers grown on planar on-axis Si (001) substrates with high slope-efficiency and low differential resistance","authors":"Feng Lin, Jun Wang, Hao Zhai, Shuaicheng Liu, Qing Ge, Yanan Chen, Chuanjiang Liu, Kaize Mao, Hao Liu, Yiming Bai, Qi Wang, Yongqing Huang, Xiaomin Ren","doi":"10.1088/1612-202x/ad3439","DOIUrl":"https://doi.org/10.1088/1612-202x/ad3439","url":null,"abstract":"We report electrically pumped continuous-wave (CW) InAs/GaAs quantum dot lasers monolithically grown on planar on-axis Si (001) substrates. Combining an asymmetric waveguide epitaxy structure with aluminium-free upper cladding layers and a symmetrical cathode chip structure, 1.3 <italic toggle=\"yes\">μ</italic>m band lasers with low differential resistance and high slope-efficiency have been achieved. Moreover, the optimized symmetrical cathode structure of the laser chips is used to improve the slope-efficiency by reducing the differential resistance and waste heat. The Fabry–Perot broad-stripe edge-emitting lasers with 2000 <italic toggle=\"yes\">μ</italic>m cavity length and 15 <italic toggle=\"yes\">μ</italic>m stripe width achieve a single-facet output power of 73 mW, a single-facet slope efficiency of 0.165 W A<sup>−1</sup>, and a differential resistance of 1.31 Ω at ∼1.31 <italic toggle=\"yes\">μ</italic>m wavelength under CW conditions at room temperature (25 °C). Importantly, these results provide an effective strategy to achieve 1.3 <italic toggle=\"yes\">μ</italic>m wavelength band single-mode distributed feedback lasers directly on planar on-axis Si (001) substrates with high efficiency.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140315854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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-modulated single-photon router and chiral scattering between two waveguides coupled by a giant three-level atom 相位调制单光子路由器和巨型三电平原子耦合的两个波导之间的手性散射
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-25 DOI: 10.1088/1612-202x/ad3436
J X Zhou, Z H Zhu, Y Q Zhang, K K Chen, Z H Peng, Y F Chai, Z Z Xiong, L Tan
{"title":"Phase-modulated single-photon router and chiral scattering between two waveguides coupled by a giant three-level atom","authors":"J X Zhou, Z H Zhu, Y Q Zhang, K K Chen, Z H Peng, Y F Chai, Z Z Xiong, L Tan","doi":"10.1088/1612-202x/ad3436","DOIUrl":"https://doi.org/10.1088/1612-202x/ad3436","url":null,"abstract":"We investigate a <italic toggle=\"yes\">T</italic>-shaped single-photon router constructed by two waveguides connected via a giant Λ-type three-level atom. Under a real-space approach, the analytical expressions of the single-photon transmission and reflection amplitudes are obtained. It is shown that a high transfer-rate routing between two waveguides can be effectively achieved by modulating the phase difference, the accumulated phase and the atom-waveguide coupling strengths, and its frequencies can be tuned with a classical driving field. Interestingly, chiral scattering and a single-photon targeted router with direction selectivity have been realized by the ideally equivalent atom-waveguide interaction. We believe that our results have potential applications in constructing optical quantum devices and designing the single-photon quantum routing using the giant-atom setup.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140316025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
2D asymmetric diffraction grating controlled by vortex light in double-Λ-type atomic system 双Λ型原子系统中由涡旋光控制的二维不对称衍射光栅
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-20 DOI: 10.1088/1612-202x/ad30f2
Ke Wang, Duo Zhang, Kunpeng Zhao, Mei Wang
{"title":"2D asymmetric diffraction grating controlled by vortex light in double-Λ-type atomic system","authors":"Ke Wang, Duo Zhang, Kunpeng Zhao, Mei Wang","doi":"10.1088/1612-202x/ad30f2","DOIUrl":"https://doi.org/10.1088/1612-202x/ad30f2","url":null,"abstract":"\u0000 A two-dimensional (2D) asymmetric diffraction grating controlled by vortex light in a double-Λ-type atomic system is studied. Such an atomic system is driven by a weak traveling-wave probe field and a signal field, a position-dependent strong standing-wave (SW) control field, and a Laguerre–Gaussian (LG) vortex field. Due to the asymmetric properties of the LG vortex field, the probe photons can be asymmetrically diffracted into four different domains after passing through the atomic media. The Diffraction patterns and intensities of the 2D asymmetric diffraction grating can be manipulated by the detuning of the probe field, the interaction length, and the intensity of SW control field. In addition, the relative phase and the azimuth parameter which is closely related to the vortex light also can be used to regulate the asymmetric diffraction grating effectively. This work may provide useful reference for optical information processing, especially for the design of optical beam dividers with desired intensities and novel quantum devices requiring asymmetric optical transmission.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140227018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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-repetition-frequency, high-energy mid-wave infrared ZnGeP2 MOPA system 高重复频率、高能量中波红外 ZnGeP2 澳门威尼斯人官网具系统
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-19 DOI: 10.1088/1612-202x/ad2dc6
Yuqing Fan, Chuanpeng Qian, Jing Liu, Jiaxin Sun, Ting Yu, Xiangchun Shi, Xisheng Ye
{"title":"High-repetition-frequency, high-energy mid-wave infrared ZnGeP2 MOPA system","authors":"Yuqing Fan, Chuanpeng Qian, Jing Liu, Jiaxin Sun, Ting Yu, Xiangchun Shi, Xisheng Ye","doi":"10.1088/1612-202x/ad2dc6","DOIUrl":"https://doi.org/10.1088/1612-202x/ad2dc6","url":null,"abstract":"\u0000 A high-repetition-frequency and high-energy ZnGeP2 master oscillator power amplifier (ZGP-MOPA) system was demonstrated. The pump source was a 2097 nm Ho:YAG laser with maximum average power of about 140 W and repetition frequency of 2 kHz. Using this pump source, the ZGP-MOPA system obtained a mid-wave infrared laser with a maximum average power of 58.9 W and pulse width of 20.1 ns, corresponding to the pulse energy and peak power of 29.5 mJ and 1.5 MW. By adjusting the divergence of seed source to match the divergence of pump source, the beam quality factor M\u0000 2 of the ZGP-OPA was 3.9 × 3.7 (horizontal directions × vertical directions), the M\u0000 2 of the signal was 2.7, and the M\u0000 2 of the idler was 2.8. The corresponding maximum average power and pulse energy were 53.3 W and 26.7 mJ.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140228250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Transition layer of the relativisyic strophotron 相对论裂殖光子的过渡层
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-13 DOI: 10.1088/1612-202x/ad244d
K. Oganesyan, A. H. Gevorgyan, D. Miakota, P. Kopcansky
{"title":"Transition layer of the relativisyic strophotron","authors":"K. Oganesyan, A. H. Gevorgyan, D. Miakota, P. Kopcansky","doi":"10.1088/1612-202x/ad244d","DOIUrl":"https://doi.org/10.1088/1612-202x/ad244d","url":null,"abstract":"\u0000 The Klein–Gordon equation of motion in the transition layer of a free-electron laser of the relativistic strophotron type is studied. The condition of suddenly switching-on interaction is found: a smallness of the transition layer at the entrance compared to the distance traveled by the electron in longitudinal direction in one period of transverse oscillations in strophotron. The results are correspond to the results of classical description. It is shown, that in an electric strophotron, under the assumption of a suddenly switching-on interaction, the transverse energy of an electron at the moment t = 0 undergoes a jump. However, the total energy is conserved, because at the same moment t = 0, the longitudinal energy of the electron has the same jump with opposite sign.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140246609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Quantum coherence and entanglement under the influence of decoherence 退相干影响下的量子相干和纠缠
IF 1.7 4区 物理与天体物理
Laser Physics Letters Pub Date : 2024-03-06 DOI: 10.1088/1612-202x/ad2dc8
Wen-Yang Sun, A-Min Ding, Juan He, Jiadong Shi, Le Wang, Hui-Fang Xu, Dong Wang, Liu Ye
{"title":"Quantum coherence and entanglement under the influence of decoherence","authors":"Wen-Yang Sun, A-Min Ding, Juan He, Jiadong Shi, Le Wang, Hui-Fang Xu, Dong Wang, Liu Ye","doi":"10.1088/1612-202x/ad2dc8","DOIUrl":"https://doi.org/10.1088/1612-202x/ad2dc8","url":null,"abstract":"In this work, we delve into the dynamic traits of the relative entropy of quantum coherence (REQC) as the quantum system interacts with the different noisy channels, drawing comparisons with entanglement (concurrence). The research results demonstrate the broader prevalence and stronger robustness of the REQC as opposed to concurrence. It’s worth noting that the bit flip channel cannot uphold a constant nonzero frozen the REQC, besides, the concurrence follows a pattern of temporary reduction to zero, followed by recovery after a certain time span. More importantly, the REQC maintains its presence consistently until reaching a critical threshold, whereas concurrence experiences completely attenuation to zero under the influence of phase damping and amplitude damping channels.","PeriodicalId":17940,"journal":{"name":"Laser Physics Letters","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140315798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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