Pub Date : 2025-03-05DOI: 10.1016/j.physleta.2025.130418
S.N. Khonina , S.A. Degtyarev , A.P. Porfirev
The combination of polarization and phase singularities in structured light fields can lead to various transformations in their structure. This enables the control of different characteristics of such structured light. In this paper, we numerically investigate the possibility of controlling the distribution of spin angular momentum (SAM) density in optical vortex (OV) beams with partially transformed cylindrical polarization. We examine the effects of the degree of transformation of cylindrical polarization and the topological charge of the OV beam on SAM distributions in both the focal and out-of-focal planes. Experimental studies conducted using a polarization video camera confirmed the polarization transformations. The results obtained enhance the understanding of the phase-polarization transformations that occur during the propagation and focusing of structured light, which can be beneficial in the fields of laser manipulation and the laser processing of photosensitive materials.
{"title":"Control of the distribution of spin angular momentum density in optical vortex beams with partially transformed cylindrical polarization","authors":"S.N. Khonina , S.A. Degtyarev , A.P. Porfirev","doi":"10.1016/j.physleta.2025.130418","DOIUrl":"10.1016/j.physleta.2025.130418","url":null,"abstract":"<div><div>The combination of polarization and phase singularities in structured light fields can lead to various transformations in their structure. This enables the control of different characteristics of such structured light. In this paper, we numerically investigate the possibility of controlling the distribution of spin angular momentum (SAM) density in optical vortex (OV) beams with partially transformed cylindrical polarization. We examine the effects of the degree of transformation of cylindrical polarization and the topological charge of the OV beam on SAM distributions in both the focal and out-of-focal planes. Experimental studies conducted using a polarization video camera confirmed the polarization transformations. The results obtained enhance the understanding of the phase-polarization transformations that occur during the propagation and focusing of structured light, which can be beneficial in the fields of laser manipulation and the laser processing of photosensitive materials.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"541 ","pages":"Article 130418"},"PeriodicalIF":2.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601302","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}
Pub Date : 2025-03-05DOI: 10.1016/j.physleta.2025.130419
Baowei Zhang , Yinuo Luo
Dirac semimetals (DSMs) have emerged as promising materials for terahertz applications due to their exceptional electronic, optical, and topological properties, as well as their reliable chemical tunability. This study explores a DSM-based tunable terahertz absorber with multi-band absorption characteristics. The absorber features a three-layer metasurface design, leveraging the unique properties of DSMs to achieve high sensitivity and tunability. By adjusting the Fermi energy or modifying structural parameters, precise control over the resonant frequencies across five distinct absorption modes was achieved. Numerical analysis demonstrates strong absorption and excellent polarization insensitivity in the 7–12 THz range. The device also exhibits outstanding refractive index sensitivity, with all modes exceeding 2500 GHz/RIU and a maximum sensitivity of 3440 GHz/RIU, making it a compelling candidate for advanced sensing applications.
{"title":"Dynamic optical tuning and sensing in L-shaped dirac semimetal-based terahertz metasurfaces","authors":"Baowei Zhang , Yinuo Luo","doi":"10.1016/j.physleta.2025.130419","DOIUrl":"10.1016/j.physleta.2025.130419","url":null,"abstract":"<div><div>Dirac semimetals (DSMs) have emerged as promising materials for terahertz applications due to their exceptional electronic, optical, and topological properties, as well as their reliable chemical tunability. This study explores a DSM-based tunable terahertz absorber with multi-band absorption characteristics. The absorber features a three-layer metasurface design, leveraging the unique properties of DSMs to achieve high sensitivity and tunability. By adjusting the Fermi energy or modifying structural parameters, precise control over the resonant frequencies across five distinct absorption modes was achieved. Numerical analysis demonstrates strong absorption and excellent polarization insensitivity in the 7–12 THz range. The device also exhibits outstanding refractive index sensitivity, with all modes exceeding 2500 GHz/RIU and a maximum sensitivity of 3440 GHz/RIU, making it a compelling candidate for advanced sensing applications.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"541 ","pages":"Article 130419"},"PeriodicalIF":2.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578109","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}
Over the past decade, binary phase-shift-keying encoding has been used as a benchmark to test the performance of different detection strategies to address the problem of state discrimination. In this context, hybrid devices, giving access to both particle- and wave-like properties of light, could offer the possibility to better discriminate the sent signals. In this work, we consider a quantum channel exploiting a hybrid receiver embedding Silicon photomultipliers as photon-number-resolving detectors. We retrieve the discrimination error probability and the mutual information between sender and receiver as functions of some relevant experimental parameters in the case of binary phase-shifted coherent states. Our promising results, supported also with numerical simulations and theoretical analysis, foster further using this kind of hybrid receiver in more complex detection schemes.
{"title":"On the application of a Silicon photomultiplier-based receiver for binary phase-shift-keying protocols","authors":"Silvia Cassina , Michele N. Notarnicola , Stefano Olivares , Alessia Allevi","doi":"10.1016/j.physleta.2025.130403","DOIUrl":"10.1016/j.physleta.2025.130403","url":null,"abstract":"<div><div>Over the past decade, binary phase-shift-keying encoding has been used as a benchmark to test the performance of different detection strategies to address the problem of state discrimination. In this context, hybrid devices, giving access to both particle- and wave-like properties of light, could offer the possibility to better discriminate the sent signals. In this work, we consider a quantum channel exploiting a hybrid receiver embedding Silicon photomultipliers as photon-number-resolving detectors. We retrieve the discrimination error probability and the mutual information between sender and receiver as functions of some relevant experimental parameters in the case of binary phase-shifted coherent states. Our promising results, supported also with numerical simulations and theoretical analysis, foster further using this kind of hybrid receiver in more complex detection schemes.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"541 ","pages":"Article 130403"},"PeriodicalIF":2.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563852","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}
Pub Date : 2025-03-05DOI: 10.1016/j.physleta.2025.130408
Leonan Augusto Massete Perá , Josimar Fernando da Silva , Elso Drigo Filho
This work presents the solution for the ground state of the confined ion-induced dipole potential using the Variational Method with a trial eigenfunction derived from the Supersymmetric Quantum Mechanics formalism to mimc the interaction between the ferrous ion and the oxygen molecule in hemoprotein cavities, analyzing the stability of this interaction for different cavity volumes. This eigenfunction incorporates terms for the confinement radius and excluded volume of the system. Results show an anomalous effect on the ground state energy in smaller accessible volumes. We discuss the stability of the bond when compared to the termal energy of the system. To validate the VM, we also calculated energies using the Finite Element Method, finding a percentage error of less than 0.1%. The proposed model is interesting due to the low percentagem error compared to FEM and the simplicity of the eigenfunction, contributing to studies on hemoprotein interaction stability.
{"title":"Ion-induced dipole interaction in confining cavities","authors":"Leonan Augusto Massete Perá , Josimar Fernando da Silva , Elso Drigo Filho","doi":"10.1016/j.physleta.2025.130408","DOIUrl":"10.1016/j.physleta.2025.130408","url":null,"abstract":"<div><div>This work presents the solution for the ground state of the confined ion-induced dipole potential using the Variational Method with a trial eigenfunction derived from the Supersymmetric Quantum Mechanics formalism to mimc the interaction between the ferrous ion and the oxygen molecule in hemoprotein cavities, analyzing the stability of this interaction for different cavity volumes. This eigenfunction incorporates terms for the confinement radius and excluded volume of the system. Results show an anomalous effect on the ground state energy in smaller accessible volumes. We discuss the stability of the bond when compared to the termal energy of the system. To validate the VM, we also calculated energies using the Finite Element Method, finding a percentage error of less than 0.1%. The proposed model is interesting due to the low percentagem error compared to FEM and the simplicity of the eigenfunction, contributing to studies on hemoprotein interaction stability.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"541 ","pages":"Article 130408"},"PeriodicalIF":2.3,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143563854","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}
Pub Date : 2025-03-04DOI: 10.1016/j.physleta.2025.130404
N. Valdivia , P.M. Jordan
Employing only analytical methodologies, we investigate Green–Naghdi's 1996 theory of incompressible viscous flow in the context of boundary-layer flow over a permeable flat wall at which transpiration is possible. We determine and discuss exact, physically plausible, solutions, for both the constant and periodic transpiration velocity cases, to the fourth order equation of motion derived from Green–Naghdi's formulation. We also compare/contrast our findings with/to those predicted by Navier–Stokes theory, as well as point out connections to both the theory of dipolar fluids and the Navier–Stokes-α model. It is shown that unlike Navier–Stokes theory, Green–Naghdi's theory can yield a wide range of physically plausible solution profiles, even when the transpiration velocity is constant-valued and positive.
{"title":"Quasi-1D boundary-layer flow with wall transpiration under the Green–Naghdi extension of classical, incompressible viscous fluid flow theory","authors":"N. Valdivia , P.M. Jordan","doi":"10.1016/j.physleta.2025.130404","DOIUrl":"10.1016/j.physleta.2025.130404","url":null,"abstract":"<div><div>Employing only analytical methodologies, we investigate Green–Naghdi's 1996 theory of incompressible viscous flow in the context of boundary-layer flow over a permeable flat wall at which transpiration is possible. We determine and discuss exact, physically plausible, solutions, for both the constant and periodic transpiration velocity cases, to the fourth order equation of motion derived from Green–Naghdi's formulation. We also compare/contrast our findings with/to those predicted by Navier–Stokes theory, as well as point out connections to both the theory of dipolar fluids and the Navier–Stokes-<em>α</em> model. It is shown that unlike Navier–Stokes theory, Green–Naghdi's theory can yield a wide range of physically plausible solution profiles, even when the transpiration velocity is constant-valued and positive.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"541 ","pages":"Article 130404"},"PeriodicalIF":2.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578111","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}
Pub Date : 2025-03-03DOI: 10.1016/j.physleta.2025.130406
Yi Zhou, Yu Mao, Shenwei Yin, Yang Li, Zefa Sun, Zhixiang Tang
Rainbow trapping has garnered significant attention due to its ability to separate, slow, and trap waves of different frequencies at different positions. However, most rainbow devices are limited to operating within a specific frequency band, as the structure of the unit cell and the lattice constant cannot be adjusted after the device is fabricated. In this work, we explore the relationship between higher-order topological corner modes (HOTCMs) and the geometric structures of the corners, using topological phononic crystals as a platform. We also propose a method for frequency-tunable rainbow trapping in higher-order topological insulators (HOTIs). The HOTIs are constructed by varying the heights of the mediums within the crystals, and the frequency tunability of the topological rainbow is achieved by introducing an out-of-plane tunable structural parameter, i.e. the channel height. Numerical simulations show that HOTCMs are strongly dependent on the configurations of corners and HOTCMs can appear sequentially in a particular order. Furthermore, the operating frequency of rainbow trapping increases as the channel height is increased within a certain range. This work offers a possibility for tuning rainbow trapping.
{"title":"Tuning rainbow trapping in higher-order topological insulators","authors":"Yi Zhou, Yu Mao, Shenwei Yin, Yang Li, Zefa Sun, Zhixiang Tang","doi":"10.1016/j.physleta.2025.130406","DOIUrl":"10.1016/j.physleta.2025.130406","url":null,"abstract":"<div><div>Rainbow trapping has garnered significant attention due to its ability to separate, slow, and trap waves of different frequencies at different positions. However, most rainbow devices are limited to operating within a specific frequency band, as the structure of the unit cell and the lattice constant cannot be adjusted after the device is fabricated. In this work, we explore the relationship between higher-order topological corner modes (HOTCMs) and the geometric structures of the corners, using topological phononic crystals as a platform. We also propose a method for frequency-tunable rainbow trapping in higher-order topological insulators (HOTIs). The HOTIs are constructed by varying the heights of the mediums within the crystals, and the frequency tunability of the topological rainbow is achieved by introducing an out-of-plane tunable structural parameter, i.e. the channel height. Numerical simulations show that HOTCMs are strongly dependent on the configurations of corners and HOTCMs can appear sequentially in a particular order. Furthermore, the operating frequency of rainbow trapping increases as the channel height is increased within a certain range. This work offers a possibility for tuning rainbow trapping.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"541 ","pages":"Article 130406"},"PeriodicalIF":2.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143578112","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}
Pub Date : 2025-03-01DOI: 10.1016/j.physleta.2025.130402
Peng Zhou , Shikai Deng , Xinyu Wen , Lei Chen , Han Ye , Yumin Liu
The emergence of vectorial optical fields (VOFs) featuring polarization singularities has introduced a new dimension to high-capacity optical communication. Cylindrical vector beams (CVBs) with VOFs play a pivotal role in enhancing multiplexing capabilities due to their transmission stability and resilience to turbulence. Straightforwardly and efficiently demultiplex CVBs with minimal crosstalk remain challenging for practical applications. This study proposes a single-layer dielectric metasurface for demultiplexing CVBs at telecommunications wavelengths. By leveraging polarization multiplexing and adjusting the rotation angle of customized metasurface units, effective spatial separation of CVB pairs is demonstrated. Furthermore, the methodology extends to demultiplexing multiple CVB pairs using interleaved unit cells set at distinct customized angles. The demultiplexing of 12-channel CVBs and their subsequent focusing into Gaussian spots were successfully demonstrated as a proof of concept. This work holds the significant potential for complex structured light manipulation and high-capacity optical communications.
{"title":"Polarization-multiplexing metasurface for vectorial optical field demultiplexing and detection on higher-order Poincaré sphere","authors":"Peng Zhou , Shikai Deng , Xinyu Wen , Lei Chen , Han Ye , Yumin Liu","doi":"10.1016/j.physleta.2025.130402","DOIUrl":"10.1016/j.physleta.2025.130402","url":null,"abstract":"<div><div>The emergence of vectorial optical fields (VOFs) featuring polarization singularities has introduced a new dimension to high-capacity optical communication. Cylindrical vector beams (CVBs) with VOFs play a pivotal role in enhancing multiplexing capabilities due to their transmission stability and resilience to turbulence. Straightforwardly and efficiently demultiplex CVBs with minimal crosstalk remain challenging for practical applications. This study proposes a single-layer dielectric metasurface for demultiplexing CVBs at telecommunications wavelengths. By leveraging polarization multiplexing and adjusting the rotation angle of customized metasurface units, effective spatial separation of CVB pairs is demonstrated. Furthermore, the methodology extends to demultiplexing multiple CVB pairs using interleaved unit cells set at distinct customized angles. The demultiplexing of 12-channel CVBs and their subsequent focusing into Gaussian spots were successfully demonstrated as a proof of concept. This work holds the significant potential for complex structured light manipulation and high-capacity optical communications.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"540 ","pages":"Article 130402"},"PeriodicalIF":2.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552354","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}
Pub Date : 2025-03-01DOI: 10.1016/j.physleta.2025.130401
Liangliang Yang , Kaiyong He , Genting Dai , Mingjun Cheng , Xiao Geng , Linpan Jiang , Jinlin Chang , Jianshe Liu , Wei Chen
In the pursuit of on-chip superconducting non-magnetic non-reciprocal devices, several designs have emerged, yet their development has lacked a unified approach, complicating the early design stages. We addressed this by building a circuit model of superconducting components in Advanced Design System (ADS) and simulating a superconducting isolator using the harmonic balance (HB) method. Our model's accuracy was validated through comparison with experimental data. The designed superconducting isolator achieved isolation, a bandwidth of less than , and an insertion loss of . This demonstrates the strong potential of our method in the design of superconducting microwave devices.
{"title":"Detailed design of Josephson parametric isolators with a customized DC-SQUID model using the harmonic balance method","authors":"Liangliang Yang , Kaiyong He , Genting Dai , Mingjun Cheng , Xiao Geng , Linpan Jiang , Jinlin Chang , Jianshe Liu , Wei Chen","doi":"10.1016/j.physleta.2025.130401","DOIUrl":"10.1016/j.physleta.2025.130401","url":null,"abstract":"<div><div>In the pursuit of on-chip superconducting non-magnetic non-reciprocal devices, several designs have emerged, yet their development has lacked a unified approach, complicating the early design stages. We addressed this by building a circuit model of superconducting components in Advanced Design System (ADS) and simulating a superconducting isolator using the harmonic balance (HB) method. Our model's accuracy was validated through comparison with experimental data. The designed superconducting isolator achieved <span><math><mrow><mo>−</mo><mn>20</mn><mrow><mspace></mspace><mtext>dB</mtext></mrow></mrow></math></span> isolation, a bandwidth of less than <span><math><mrow><mn>500</mn><mspace></mspace><mtext>MHz</mtext></mrow></math></span>, and an insertion loss of <span><math><mrow><mn>5</mn><mrow><mspace></mspace><mtext>dB</mtext></mrow></mrow></math></span>. This demonstrates the strong potential of our method in the design of superconducting microwave devices.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"540 ","pages":"Article 130401"},"PeriodicalIF":2.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143552352","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}
Imaging of two incoherent point sources provides basic building block for the fluorescence microscopy and astronomical observation. Here, we demonstrate that the measurement sensitivity per detected photon (SPDP) can be enhanced by adding a noiseless attenuation operation in a traditional imaging system, where the noiseless attenuator can be simulated by a beam splitter assisted by vacuum detection. The results show that the noiseless attenuation operation can outperform the normal attenuation operation in terms of SPDP. This advantage can be attributed to the noiseless attenuation technology that attenuates signal without introducing additional classical and quantum noise. Moreover, even when considering practical imperfections, such as misalignment of the demultiplexer base relative to the centroid of the two sources, the noiseless attenuation imaging system can still maintain its advantage. Our results have potential applications in quantum super-resolution imaging and quantum metrology.
{"title":"Enhancing the super-resolution of incoherent sources via noiseless attenuation","authors":"Ying Xia , Huan Zhang , Yaxin Wang , Zeyang Liao , Xiaoqi Zhou","doi":"10.1016/j.physleta.2025.130400","DOIUrl":"10.1016/j.physleta.2025.130400","url":null,"abstract":"<div><div>Imaging of two incoherent point sources provides basic building block for the fluorescence microscopy and astronomical observation. Here, we demonstrate that the measurement sensitivity per detected photon (SPDP) can be enhanced by adding a noiseless attenuation operation in a traditional imaging system, where the noiseless attenuator can be simulated by a beam splitter assisted by vacuum detection. The results show that the noiseless attenuation operation can outperform the normal attenuation operation in terms of SPDP. This advantage can be attributed to the noiseless attenuation technology that attenuates signal without introducing additional classical and quantum noise. Moreover, even when considering practical imperfections, such as misalignment of the demultiplexer base relative to the centroid of the two sources, the noiseless attenuation imaging system can still maintain its advantage. Our results have potential applications in quantum super-resolution imaging and quantum metrology.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"540 ","pages":"Article 130400"},"PeriodicalIF":2.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143528860","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}
Pub Date : 2025-02-28DOI: 10.1016/j.physleta.2025.130399
Dong-Ao Li , Guo-Bo Zhang , Yue Cao , Li-Xiang Hu , Xiao-Hu Yang , Fu-Qiu Shao , Tong-Pu Yu
Polarized mid-infrared (mid-IR) pulses have many practical applications, including optical imaging, harmonics generation, and laser-electron acceleration, etc. Although it has been able to generate such pulses based on traditional nonlinear optical methods, extending it to long-wavelength, few-cycle, and relativistic intensity range is still very challenging. Here, we proposed a scheme to generate a relativistic long-wavelength few-cycle and radially polarized mid-IR pulse via the photon deceleration. Three-dimensional particle-in-cell simulations show that, by using a plasma channel, the radially polarized mid-IR pulse can be obtained with a center wavelength of 9.4 μm, a dimensionless intensity of , a 72 fs FWHM duration containing 2.3 optical cycles, and a conversion efficiency of 3.4%. Meanwhile, the beam parameters of the generated radially polarized mid-IR pulse can be effectively controlled by changing the plasma channel depth. The radially polarized pulse can be focused further to excite a stronger plasma wake in a plasma channel with large depth, leading to an increase in the normalized intensity and conversion efficiency of the mid-IR pulse. Such mid-IR pulse sources may offer new opportunities for ultrafast applications and high-field physics, etc.
{"title":"Generation of relativistic few-cycle radially polarized mid-infrared pulse in plasma channel","authors":"Dong-Ao Li , Guo-Bo Zhang , Yue Cao , Li-Xiang Hu , Xiao-Hu Yang , Fu-Qiu Shao , Tong-Pu Yu","doi":"10.1016/j.physleta.2025.130399","DOIUrl":"10.1016/j.physleta.2025.130399","url":null,"abstract":"<div><div>Polarized mid-infrared (mid-IR) pulses have many practical applications, including optical imaging, harmonics generation, and laser-electron acceleration, etc. Although it has been able to generate such pulses based on traditional nonlinear optical methods, extending it to long-wavelength, few-cycle, and relativistic intensity range is still very challenging. Here, we proposed a scheme to generate a relativistic long-wavelength few-cycle and radially polarized mid-IR pulse via the photon deceleration. Three-dimensional particle-in-cell simulations show that, by using a plasma channel, the radially polarized mid-IR pulse can be obtained with a center wavelength of 9.4 μm, a dimensionless intensity of <span><math><msub><mrow><mi>a</mi></mrow><mrow><mi>M</mi><mi>I</mi><mi>R</mi></mrow></msub><mo>≈</mo><mn>2.5</mn></math></span>, a 72 fs FWHM duration containing 2.3 optical cycles, and a conversion efficiency of 3.4%. Meanwhile, the beam parameters of the generated radially polarized mid-IR pulse can be effectively controlled by changing the plasma channel depth. The radially polarized pulse can be focused further to excite a stronger plasma wake in a plasma channel with large depth, leading to an increase in the normalized intensity and conversion efficiency of the mid-IR pulse. Such mid-IR pulse sources may offer new opportunities for ultrafast applications and high-field physics, etc.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"540 ","pages":"Article 130399"},"PeriodicalIF":2.3,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534797","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}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号