首页 > 最新文献

Physics Letters A最新文献

英文 中文
The impact of individual emotions and 2-simplex states on the spread of epidemics in multilayer networks
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-28 DOI: 10.1016/j.physleta.2024.130159
Long Li , Shiwen Sun , Li Wang
In recent years, the interaction between information diffusion and epidemic spreading in higher-order networks has been a hot research topic. Previous study has revealed that individual emotions played a significant role in epidemic spreading, which deserves further study in multilayer networks with higher-order interactions. Thus, this paper proposes a two-layer network model that considers the effect of both individual emotions and 2-simplex states. In the virtual layer, information diffusion is affected by the state of 2-simplex and individual's emotion state simultaneously. Meanwhile, epidemic spreading occurs in the physical layer through pairwise interactions. Theoretical analysis based on Micro-Markov Chain Approach (MMCA) and numerical simulations based on Monte-Carlo (MC) method are performed. Our findings demonstrate that individual emotions can inhibit the spread of epidemics and 2-simplex states indirectly influence epidemic spreading through controlling the additional information transmission capacity in the upper layer.
{"title":"The impact of individual emotions and 2-simplex states on the spread of epidemics in multilayer networks","authors":"Long Li ,&nbsp;Shiwen Sun ,&nbsp;Li Wang","doi":"10.1016/j.physleta.2024.130159","DOIUrl":"10.1016/j.physleta.2024.130159","url":null,"abstract":"<div><div>In recent years, the interaction between information diffusion and epidemic spreading in higher-order networks has been a hot research topic. Previous study has revealed that individual emotions played a significant role in epidemic spreading, which deserves further study in multilayer networks with higher-order interactions. Thus, this paper proposes a two-layer network model that considers the effect of both individual emotions and 2-simplex states. In the virtual layer, information diffusion is affected by the state of 2-simplex and individual's emotion state simultaneously. Meanwhile, epidemic spreading occurs in the physical layer through pairwise interactions. Theoretical analysis based on Micro-Markov Chain Approach (MMCA) and numerical simulations based on Monte-Carlo (MC) method are performed. Our findings demonstrate that individual emotions can inhibit the spread of epidemics and 2-simplex states indirectly influence epidemic spreading through controlling the additional information transmission capacity in the upper layer.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"531 ","pages":"Article 130159"},"PeriodicalIF":2.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143150258","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
Ring-like double-breathers in the partially nonlocal medium with different diffraction characteristics in both directions under the influence of external potential and gain/loss
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-27 DOI: 10.1016/j.physleta.2025.130293
Emmanuel Yomba
This study explores a (3+1)-dimensional variable-coefficient partially nonlocal coupled nonlinear Schrödinger (NLS) model, revealing its dimensional reduction to a (2+1)-dimensional constant-coefficient analog. This transformation yields analytical solutions that manifest as double-breathers with Hermite-Gaussian envelopes. Focusing on the dynamic characteristics of these double-breathers, the research emphasizes their ring-like or cylinder-like structures, particularly in systems with exponential diffraction and gain, along with constant-type chirp and phases. Key parameters, such as the radius parameter R and thickness parameter ω, significantly influence the size, shape, and structural intricacies of the double-breathers. Additionally, Hermite parameters p and n allow for the formation of layered structures along the z-axis, enriching the wave dynamics. The integration of gain or loss phenomena links theoretical insights with practical applications, enhancing the relevance of the findings in real-world scenarios.
{"title":"Ring-like double-breathers in the partially nonlocal medium with different diffraction characteristics in both directions under the influence of external potential and gain/loss","authors":"Emmanuel Yomba","doi":"10.1016/j.physleta.2025.130293","DOIUrl":"10.1016/j.physleta.2025.130293","url":null,"abstract":"<div><div>This study explores a (3+1)-dimensional variable-coefficient partially nonlocal coupled nonlinear Schrödinger (NLS) model, revealing its dimensional reduction to a (2+1)-dimensional constant-coefficient analog. This transformation yields analytical solutions that manifest as double-breathers with Hermite-Gaussian envelopes. Focusing on the dynamic characteristics of these double-breathers, the research emphasizes their ring-like or cylinder-like structures, particularly in systems with exponential diffraction and gain, along with constant-type chirp and phases. Key parameters, such as the radius parameter <em>R</em> and thickness parameter <em>ω</em>, significantly influence the size, shape, and structural intricacies of the double-breathers. Additionally, Hermite parameters <em>p</em> and <em>n</em> allow for the formation of layered structures along the z-axis, enriching the wave dynamics. The integration of gain or loss phenomena links theoretical insights with practical applications, enhancing the relevance of the findings in real-world scenarios.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130293"},"PeriodicalIF":2.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147070","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
Investigating the electronic, optical, and elastic properties of bulk and monolayer CrAs under an electric field effect
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-27 DOI: 10.1016/j.physleta.2025.130306
Ammar A. Kadhim , Jabbar M. Khalaf Al-zyadi , H. Sedghi
This work uses first-principles simulations to investigate the electrical and optical characteristics of CrAs in bulk and monolayer forms. The alloy has a total magnetic moment of 3 μB/f.u.. The alloy is a stable binary Heusler alloy, exhibiting half-metallic ferromagnetic characteristics. According to the Slater-Pauling rule (Mt=Zt-8), the optimal lattice constants for the bulk and monolayer forms are 4.01 and 3.56 Å, respectively. A direct band gap of 1.76 eV is seen in the bulk configuration of CrAs, but a direct band gap of 1.56 eV is seen in the monolayer structure. The elastic constant study verifies the mechanical stability of the alloy. We computed the dielectric function and absorption coefficient as well as the alloy's optical spectra in the energy range of 0–15 eV. Optoelectronics and spintronics show promise with half-metals. Under electric fields of E = +0.2 V/nm and E = -0.2 V/nm, the monolayer displayed half-metallic characteristics; however, at E = +0.4 V/nm and E = -0.4 V/nm, it did not.
{"title":"Investigating the electronic, optical, and elastic properties of bulk and monolayer CrAs under an electric field effect","authors":"Ammar A. Kadhim ,&nbsp;Jabbar M. Khalaf Al-zyadi ,&nbsp;H. Sedghi","doi":"10.1016/j.physleta.2025.130306","DOIUrl":"10.1016/j.physleta.2025.130306","url":null,"abstract":"<div><div>This work uses first-principles simulations to investigate the electrical and optical characteristics of CrAs in bulk and monolayer forms. The alloy has a total magnetic moment of 3 μ<sub>B</sub>/f.u.. The alloy is a stable binary Heusler alloy, exhibiting half-metallic ferromagnetic characteristics. According to the Slater-Pauling rule (Mt=Zt-8), the optimal lattice constants for the bulk and monolayer forms are 4.01 and 3.56 Å, respectively. A direct band gap of 1.76 eV is seen in the bulk configuration of CrAs, but a direct band gap of 1.56 eV is seen in the monolayer structure. The elastic constant study verifies the mechanical stability of the alloy. We computed the dielectric function and absorption coefficient as well as the alloy's optical spectra in the energy range of 0–15 eV. Optoelectronics and spintronics show promise with half-metals. Under electric fields of <em>E</em> = +0.2 V/nm and <em>E</em> = -0.2 V/nm, the monolayer displayed half-metallic characteristics; however, at <em>E</em> = +0.4 V/nm and <em>E</em> = -0.4 V/nm, it did not.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130306"},"PeriodicalIF":2.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146574","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
Efficient beam spatial profiles via three-wave mixing in tunneling quantum dots
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-27 DOI: 10.1016/j.physleta.2025.130308
Qiang Li, Zhao Yang
This paper explores the effects of orbital angular momentum (OAM) and phase sensitivity in Three-Wave Mixing (TWM) processes within a quantum dot (QD) system. We analyze the efficiency, spatial, and phase characteristics of the generated TWM beam as influenced by varying control beam parameters. Our results demonstrate that the efficiency of the TWM beam exhibits a double-peak structure, with increased tunneling enhancing the efficiency at detuning values away from resonance. Additionally, the evolution of efficiency during beam propagation shows distinct behaviors depending on the tunneling parameter, with larger values initially increasing efficiency before slightly decreasing, while smaller values result in a steady increase. The phase sensitivity of the QD system allows for spatially dependent effects, as evidenced by the control beam's spatial profile being transferred to the generated TWM beam. The intensity profiles reveal that a Gaussian control beam results in a central peak, whereas vortex beams with nonzero OAM induce doughnut-shaped intensity profiles with zero central intensity. The observed phenomena are attributed to the closed-loop structure of the QD system enabled by electron tunneling, which preserves and transfers the spatial and phase attributes of the control beam to the TWM beam. These findings highlight the potential for precise control over TWM beams through phase and spatial modulation, with implications for advanced optical applications such as beam shaping, imaging, and communication.
{"title":"Efficient beam spatial profiles via three-wave mixing in tunneling quantum dots","authors":"Qiang Li,&nbsp;Zhao Yang","doi":"10.1016/j.physleta.2025.130308","DOIUrl":"10.1016/j.physleta.2025.130308","url":null,"abstract":"<div><div>This paper explores the effects of orbital angular momentum (OAM) and phase sensitivity in Three-Wave Mixing (TWM) processes within a quantum dot (QD) system. We analyze the efficiency, spatial, and phase characteristics of the generated TWM beam as influenced by varying control beam parameters. Our results demonstrate that the efficiency of the TWM beam exhibits a double-peak structure, with increased tunneling enhancing the efficiency at detuning values away from resonance. Additionally, the evolution of efficiency during beam propagation shows distinct behaviors depending on the tunneling parameter, with larger values initially increasing efficiency before slightly decreasing, while smaller values result in a steady increase. The phase sensitivity of the QD system allows for spatially dependent effects, as evidenced by the control beam's spatial profile being transferred to the generated TWM beam. The intensity profiles reveal that a Gaussian control beam results in a central peak, whereas vortex beams with nonzero OAM induce doughnut-shaped intensity profiles with zero central intensity. The observed phenomena are attributed to the closed-loop structure of the QD system enabled by electron tunneling, which preserves and transfers the spatial and phase attributes of the control beam to the TWM beam. These findings highlight the potential for precise control over TWM beams through phase and spatial modulation, with implications for advanced optical applications such as beam shaping, imaging, and communication.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130308"},"PeriodicalIF":2.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146570","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
A novel underwater acoustic absorbing coating for low-frequency and broadband sound based on liquid-solid synergistic mechanism
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-27 DOI: 10.1016/j.physleta.2025.130307
Xiaodong Wen , Hongqiao Jiang , Ningdong Hu , Chao Luo
Underwater acoustic absorbing coatings are typically coated on submarine hulls to reduce the risk of being detected by hostile sonars. This paper presents a novel solid-liquid-gas multi-cavity structure for underwater sound absorption. An acoustic-structural coupling analysis is then performed on the deformed structure to explore how geometric parameters, hydrostatic pressure, metal frames, and mass-core influence sound absorption performance. The study also examines the sound absorption mechanism and the power dissipation density distribution in the solid and liquid components. Results indicate that with only 20 mm thickness, the proposed acoustic-absorbing coating shows excellent hydrostatic pressure resistance and offers outstanding low frequency and broadband acoustic absorption at a frequency range of 13 - 10,000 Hz. Meanwhile, the coating indicates strong angular adaptability for incident acoustic waves. This study offers a theoretical reference for the design and engineering application of ultra-thin, low-frequency, broadband underwater acoustic absorbing coating under hydrostatic pressure.
{"title":"A novel underwater acoustic absorbing coating for low-frequency and broadband sound based on liquid-solid synergistic mechanism","authors":"Xiaodong Wen ,&nbsp;Hongqiao Jiang ,&nbsp;Ningdong Hu ,&nbsp;Chao Luo","doi":"10.1016/j.physleta.2025.130307","DOIUrl":"10.1016/j.physleta.2025.130307","url":null,"abstract":"<div><div>Underwater acoustic absorbing coatings are typically coated on submarine hulls to reduce the risk of being detected by hostile sonars. This paper presents a novel solid-liquid-gas multi-cavity structure for underwater sound absorption. An acoustic-structural coupling analysis is then performed on the deformed structure to explore how geometric parameters, hydrostatic pressure, metal frames, and mass-core influence sound absorption performance. The study also examines the sound absorption mechanism and the power dissipation density distribution in the solid and liquid components. Results indicate that with only 20 mm thickness, the proposed acoustic-absorbing coating shows excellent hydrostatic pressure resistance and offers outstanding low frequency and broadband acoustic absorption at a frequency range of 13 - 10,000 Hz. Meanwhile, the coating indicates strong angular adaptability for incident acoustic waves. This study offers a theoretical reference for the design and engineering application of ultra-thin, low-frequency, broadband underwater acoustic absorbing coating under hydrostatic pressure.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"537 ","pages":"Article 130307"},"PeriodicalIF":2.3,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143136337","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
Quantum scalar product via quantum walks
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-26 DOI: 10.1016/j.physleta.2025.130304
Jin-Tao Wang, Zhi-Gang Gan, Tian-Yu Ye
In this paper, in order to calculate the scalar product of two private vectors from two communicants without leaking them, we propose a novel secure two-party quantum scalar product (TPQSP) protocol based on two-direction quantum walks on a circle (TDQWC) which needs the assistance of a semi-honest third party (TP). Here, TP is allowed to misbehave on her own wills but cannot conspire with others. The proposed protocol adopts the quantum walk (QW) states as the initial quantum resource, which are two-particle product states rather than quantum entangled states. The proposed protocol only needs d-dimensional and two-dimensional single particle measurements rather than quantum entangled state measurements. We prove in detail that the proposed protocol not only has information-theoretically security but also is secure against both the outside attacks and the participant attacks. Moreover, we not only deduce out the correctness of the proposed protocol theoretically, but also validate it through quantum circuits simulated on IBM Qiskit platform.
{"title":"Quantum scalar product via quantum walks","authors":"Jin-Tao Wang,&nbsp;Zhi-Gang Gan,&nbsp;Tian-Yu Ye","doi":"10.1016/j.physleta.2025.130304","DOIUrl":"10.1016/j.physleta.2025.130304","url":null,"abstract":"<div><div>In this paper, in order to calculate the scalar product of two private vectors from two communicants without leaking them, we propose a novel secure two-party quantum scalar product (TPQSP) protocol based on two-direction quantum walks on a circle (TDQWC) which needs the assistance of a semi-honest third party (TP). Here, TP is allowed to misbehave on her own wills but cannot conspire with others. The proposed protocol adopts the quantum walk (QW) states as the initial quantum resource, which are two-particle product states rather than quantum entangled states. The proposed protocol only needs <span><math><mi>d</mi></math></span>-dimensional and two-dimensional single particle measurements rather than quantum entangled state measurements. We prove in detail that the proposed protocol not only has information-theoretically security but also is secure against both the outside attacks and the participant attacks. Moreover, we not only deduce out the correctness of the proposed protocol theoretically, but also validate it through quantum circuits simulated on IBM Qiskit platform.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130304"},"PeriodicalIF":2.3,"publicationDate":"2025-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147071","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
Theoretical research on multi-window electromagnetically induced transparency and the application in THz range based on a metamaterial using Dirac semimetals
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-25 DOI: 10.1016/j.physleta.2025.130300
Min Zhou , Yuchen Li , Jinping Tian , Rongcao Yang
A metamaterial based on Dirac semimetals (DS) is proposed to achieve a multi-window electromagnetic induced transparency (EIT) effect. The impact of geometric parameters on the EIT-like effect is examined, and a switching function can be achieved by adjusting the Fermi level of the DS to 60meV and 220meV. It demonstrates excellent refractive index sensing characteristics when the analyte refractive index is within the range of 1.0–1.1. Finally, it is observed that a superior slow light effect can be obtained with maximum delay time of 3.65ps, 5.22ps and 6.55ps when the Fermi level of the DS is set to 80meV, 100meV and 120meV, respectively. This metamaterial possesses numerous potential applications in actively tunable THz optical devices, including terahertz (THz) filters, active THz switches, refractive index sensors, slow light devices, and more.
{"title":"Theoretical research on multi-window electromagnetically induced transparency and the application in THz range based on a metamaterial using Dirac semimetals","authors":"Min Zhou ,&nbsp;Yuchen Li ,&nbsp;Jinping Tian ,&nbsp;Rongcao Yang","doi":"10.1016/j.physleta.2025.130300","DOIUrl":"10.1016/j.physleta.2025.130300","url":null,"abstract":"<div><div>A metamaterial based on Dirac semimetals (DS) is proposed to achieve a multi-window electromagnetic induced transparency (EIT) effect. The impact of geometric parameters on the EIT-like effect is examined, and a switching function can be achieved by adjusting the Fermi level of the DS to 60meV and 220meV. It demonstrates excellent refractive index sensing characteristics when the analyte refractive index is within the range of 1.0–1.1. Finally, it is observed that a superior slow light effect can be obtained with maximum delay time of 3.65ps, 5.22ps and 6.55ps when the Fermi level of the DS is set to 80meV, 100meV and 120meV, respectively. This metamaterial possesses numerous potential applications in actively tunable THz optical devices, including terahertz (THz) filters, active THz switches, refractive index sensors, slow light devices, and more.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130300"},"PeriodicalIF":2.3,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146571","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
Theoretical design of high responsivity and high output power sub-THz MUTC-PDs from vertical to waveguide configurations
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-25 DOI: 10.1016/j.physleta.2025.130303
Shuaiyang Zhang , Huijuan Niu , Qingtao Chen , Yikang Zhang , Kai Liu , Xiaofeng Duan , Yongqing Huang
We demonstrate novel configurations for sub-THz modified uni-traveling-carrier photodetectors (MUTC-PDs) with high responsivity and output power, transitioning from vertical to waveguide-based designs. At 100 GHz, the vertical MUTC-PD demonstrates an output power ranging from 8.07 dBm to 14.89 dBm, while at 140 GHz, the output power varies from 5.94 dBm to 13.2 dBm, under bias voltages between 0 V and -2 V. The proposed waveguide MUTC-PD, featuring a 3D configuration with a dimension of 4 μm × 7 μm, achieves a responsivity of 0.79 A/W. This design exhibits a maximum 3-dB bandwidth of 152.83 GHz and a bandwidth efficiency product of 96.58 GHz. The well-optimized sub-THz MUTC-PD operates at low bias voltages, while the transformation from vertical to waveguide configurations offers the flexibility to choose the most suitable photodetector type based on specific requirements. This approach enables optimized performance across various use cases and holds significant potential for applications in the terahertz regime.
{"title":"Theoretical design of high responsivity and high output power sub-THz MUTC-PDs from vertical to waveguide configurations","authors":"Shuaiyang Zhang ,&nbsp;Huijuan Niu ,&nbsp;Qingtao Chen ,&nbsp;Yikang Zhang ,&nbsp;Kai Liu ,&nbsp;Xiaofeng Duan ,&nbsp;Yongqing Huang","doi":"10.1016/j.physleta.2025.130303","DOIUrl":"10.1016/j.physleta.2025.130303","url":null,"abstract":"<div><div>We demonstrate novel configurations for sub-THz modified uni-traveling-carrier photodetectors (MUTC-PDs) with high responsivity and output power, transitioning from vertical to waveguide-based designs. At 100 GHz, the vertical MUTC-PD demonstrates an output power ranging from 8.07 dBm to 14.89 dBm, while at 140 GHz, the output power varies from 5.94 dBm to 13.2 dBm, under bias voltages between 0 V and -2 V. The proposed waveguide MUTC-PD, featuring a 3D configuration with a dimension of 4 μm × 7 μm, achieves a responsivity of 0.79 A/W. This design exhibits a maximum 3-dB bandwidth of 152.83 GHz and a bandwidth efficiency product of 96.58 GHz. The well-optimized sub-THz MUTC-PD operates at low bias voltages, while the transformation from vertical to waveguide configurations offers the flexibility to choose the most suitable photodetector type based on specific requirements. This approach enables optimized performance across various use cases and holds significant potential for applications in the terahertz regime.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130303"},"PeriodicalIF":2.3,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143146572","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
New kink-antikink solitons of the pair-transition-coupled nonlinear Schrödinger equations
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-23 DOI: 10.1016/j.physleta.2025.130290
Houria Triki , Sassi Aouadi , Chun Wei , Qin Zhou
This work presents three new types of coupled periodic waves in a two-component Bose-Einstein condensates (BEC) with pair-transition effects, which all degenerate to distinctive optical shock-wave pairs in the long-wave limit. The newly obtained kink-antikink soliton waveforms exist in two distinct types and are allowable in the repulsive nonlinear interaction case. The analytical nonautonomous periodic wave and kink-antikink solitons for the pair-transition-coupled nonlinear Schrödinger (NLS) equations with varying coefficients of nonlinearity, diffraction, pair-transition effects, gain/loss, and harmonic potential are obtained by similarity transformation. As an important application, the nonlinear tunneling effects of these constructed chirped nonautonomous kink-antikink solitons are discussed when they pass through nonlinear barrier and nonlinear well. The results indicate that the kink-antikink solitons form valleys or form peaks as they pass through nonlinear barriers or nonlinear wells, respectively.
{"title":"New kink-antikink solitons of the pair-transition-coupled nonlinear Schrödinger equations","authors":"Houria Triki ,&nbsp;Sassi Aouadi ,&nbsp;Chun Wei ,&nbsp;Qin Zhou","doi":"10.1016/j.physleta.2025.130290","DOIUrl":"10.1016/j.physleta.2025.130290","url":null,"abstract":"<div><div>This work presents three new types of coupled periodic waves in a two-component Bose-Einstein condensates (BEC) with pair-transition effects, which all degenerate to distinctive optical shock-wave pairs in the long-wave limit. The newly obtained kink-antikink soliton waveforms exist in two distinct types and are allowable in the repulsive nonlinear interaction case. The analytical nonautonomous periodic wave and kink-antikink solitons for the pair-transition-coupled nonlinear Schrödinger (NLS) equations with varying coefficients of nonlinearity, diffraction, pair-transition effects, gain/loss, and harmonic potential are obtained by similarity transformation. As an important application, the nonlinear tunneling effects of these constructed chirped nonautonomous kink-antikink solitons are discussed when they pass through nonlinear barrier and nonlinear well. The results indicate that the kink-antikink solitons form valleys or form peaks as they pass through nonlinear barriers or nonlinear wells, respectively.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130290"},"PeriodicalIF":2.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147075","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
Solitary wave solutions of ac-driven nonlinear Schrödinger equation supported by localized gain-loss
IF 2.3 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Pub Date : 2025-01-23 DOI: 10.1016/j.physleta.2025.130288
Sanjana Bhatia , Amit Goyal , Thokala Soloman Raju , C.N. Kumar
In this study, we investigate solitary wave solutions of the ac-driven nonlinear Schrödinger equation supported by localized gain-loss. By modifying the model equation to incorporate nonlinear loss, we derive exact analytical solutions for both localized and wave-train patterns. Utilizing powerful mathematical tools such as Möbius and fractional transformations, we identify analytical bright, dark, and periodic solutions, outlining the entire phase plot of the model parameters where these solutions are possible under both trivial and non-trivial chirping conditions. Our results demonstrate the model's versatility, providing a robust framework for the design and control of optical systems. This work advances the theoretical framework for dissipative solitons with significant potential for real-world applications in high-capacity telecommunications and optical frequency combs.
{"title":"Solitary wave solutions of ac-driven nonlinear Schrödinger equation supported by localized gain-loss","authors":"Sanjana Bhatia ,&nbsp;Amit Goyal ,&nbsp;Thokala Soloman Raju ,&nbsp;C.N. Kumar","doi":"10.1016/j.physleta.2025.130288","DOIUrl":"10.1016/j.physleta.2025.130288","url":null,"abstract":"<div><div>In this study, we investigate solitary wave solutions of the ac-driven nonlinear Schrödinger equation supported by localized gain-loss. By modifying the model equation to incorporate nonlinear loss, we derive exact analytical solutions for both localized and wave-train patterns. Utilizing powerful mathematical tools such as Möbius and fractional transformations, we identify analytical bright, dark, and periodic solutions, outlining the entire phase plot of the model parameters where these solutions are possible under both trivial and non-trivial chirping conditions. Our results demonstrate the model's versatility, providing a robust framework for the design and control of optical systems. This work advances the theoretical framework for dissipative solitons with significant potential for real-world applications in high-capacity telecommunications and optical frequency combs.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"536 ","pages":"Article 130288"},"PeriodicalIF":2.3,"publicationDate":"2025-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143147076","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
期刊
Physics Letters A
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1