Physics Letters A最新文献_第2页

Bloch oscillation and Landau-Zener tunneling of a periodically kicked Dirac particle 周期性踢动狄拉克粒子的布洛赫振荡和朗道-齐纳隧穿

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-06 DOI: 10.1016/j.physleta.2025.130720

Bin Sun, Shaowen Lan, Yi Cao, Jie Liu

引用次数: 0

Inducing localized solutions via interaction in a self-defocusing system with localized pumping 在具有局域抽运的自散焦系统中，通过相互作用诱导局域解

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-06 DOI: 10.1016/j.physleta.2025.130726

Wesley B. Cardoso , Mateus C.P. dos Santos

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IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-06 DOI: 10.1016/j.physleta.2025.130727

Wen-Xiu Ma

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Broadband and high-extinction plasmonic polarization filter using photonic crystal fiber with dual elliptical graphene-coated silver layers 采用双椭圆石墨烯包覆银层光子晶体光纤的宽带高消光等离子体偏振滤波器

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-06 DOI: 10.1016/j.physleta.2025.130706

Nan Chen , Yuxin Zhu , Xin Ding , Hui Chen , Shuhua Cao , Yiming Xu , Fan Yang , Tiancheng Wu

{"title":"Broadband and high-extinction plasmonic polarization filter using photonic crystal fiber with dual elliptical graphene-coated silver layers","authors":"Nan Chen , Yuxin Zhu , Xin Ding , Hui Chen , Shuhua Cao , Yiming Xu , Fan Yang , Tiancheng Wu","doi":"10.1016/j.physleta.2025.130706","DOIUrl":"10.1016/j.physleta.2025.130706","url":null,"abstract":"<div><div>Polarization filters are key components driving the widespread adoption of new photonic integration technologies. This work demonstrates a broadband and high-extinction plasmonic polarization filter using photonic crystal fiber with dual graphene-coated elliptical silver layers. The finite element method is employed to analyze in-fiber transmission behavior. The graphene-silver layers are introduced to stimulate the surface plasmon resonance effect, significantly enhancing the difference in signal strength across different polarization directions. The numerical results indicate that when the lattice constant is 1.6 μm, the diameter of the cladding hole is 1.2 μm and the larger diameter of holes near core region is 1.45 μm, the length of elliptical hole long axis is 2.0 μm, the length of elliptical hole short axis is 0.60 μm, the thickness of silver layer is 50 nm, and the thickness of graphene layer is 17 nm, the intensity difference between the two polarization signals reaches 12712 times. The 400 μm-long PCF filter, supporting single mode single polarization transmission, exhibits the maximum extinction ratio of -249.1 dB, with an ultra-broad band of greater than 880 nm, covering two common communication windows of 1.31 and 1.55 μm. Boasting excellent comprehensive performance, this all-fiber polarizer is anticipated to be a candidate device for further optimization of photonic signal processing, optical communication, and optical computing technologies.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"553 ","pages":"Article 130706"},"PeriodicalIF":2.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144230535","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

Molecular dynamics study on the influence of size on thermal conductivity of carbon nanotubes with different structures 尺寸对不同结构碳纳米管导热性能影响的分子动力学研究

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-06 DOI: 10.1016/j.physleta.2025.130736

Zhenglisha Chen, Xiangyan Luo, Qian Chen, Weiliang Zheng, Quan Xie

{"title":"Molecular dynamics study on the influence of size on thermal conductivity of carbon nanotubes with different structures","authors":"Zhenglisha Chen, Xiangyan Luo, Qian Chen, Weiliang Zheng, Quan Xie","doi":"10.1016/j.physleta.2025.130736","DOIUrl":"10.1016/j.physleta.2025.130736","url":null,"abstract":"<div><div>This study employs Molecular dynamics (MD) to systematically elucidate the structure-property relationship between geometric parameters and thermal transport characteristics of two typical chiral CNT (Armchair and Zigzag). The results reveal that the thermal conductivity of CNT is significantly influenced by their structural type, size, and temperature, with distinct behaviors observed for armchair and zigzag. Specifically, armchair exhibit higher thermal conductivity for smaller lengths (<40 nm), with distinct trends observed around a diameter of 2 nm: Below 2 nm, the thermal conductivity increases linearly with diameter. Above 2 nm, structural effects become pronounced, leading to an increase in the thermal conductivity difference between the two structures, accompanied by an oscillatory growth pattern as the diameter increases. For longer lengths (>40 nm), zigzag exhibit higher thermal conductivity. In addition, thermal conductivity decreases with increasing temperature. This study analyzes the heat conduction mechanisms of CNT using key thermal parameters and phonon theory.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130736"},"PeriodicalIF":2.3,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253605","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

Fisher Information and Emergent High-T Superconductivity Fisher信息与涌现的高t超导

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-04 DOI: 10.1016/j.physleta.2025.130717

A. Plastino , F. Pennini

引用次数: 0

Experimental verification of generalized synchronization 广义同步的实验验证

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-04 DOI: 10.1016/j.physleta.2025.130718

Tania Ghosh , Soumitro Banerjee

引用次数: 0

Propagation of three-dimensional optical vortice solitons in fractional Ginzburg-Landau model 分数阶金兹堡-朗道模型中三维光学涡孤子的传播

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-04 DOI: 10.1016/j.physleta.2025.130719

Hongkun Jin , Huiling Wang , Yingji He

引用次数: 0

Laser-processed rapid fabrication of FET devices with large-scale chemically grown graphene 大规模化学生长石墨烯的激光加工快速制造FET器件

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-04 DOI: 10.1016/j.physleta.2025.130724

Yoshihiro Shimazu , Rikuto Ishikawa , Hayato Akaishi

{"title":"Laser-processed rapid fabrication of FET devices with large-scale chemically grown graphene","authors":"Yoshihiro Shimazu , Rikuto Ishikawa , Hayato Akaishi","doi":"10.1016/j.physleta.2025.130724","DOIUrl":"10.1016/j.physleta.2025.130724","url":null,"abstract":"<div><div>Graphene field-effect transistors (FETs) are promising candidates for next-generation electronic devices due to their exceptional electrical properties. This study presents the fabrication and transport characteristics of graphene FETs patterned via a novel mask-free technique using a general-purpose femtosecond laser beam cutter. This method enables precise patterning while causing no damage to graphene, except at the cutting edge. Furthermore, contamination from polymer residues, commonly introduced in traditional lithographic processes, is entirely eliminated. Another significant advantage is the extremely short fabrication time. The charge neutrality point (CNP), which had been strongly shifted to higher gate voltages due to unintentional p-type doping, was substantially lowered by current-induced cleaning. Temperature-dependent conductance and magnetoresistance (MR) measurements are presented. Negative MR behavior was analyzed using weak localization theory, allowing extraction of scattering lengths, which were compared with values reported in previous studies. These results contribute to a deeper understanding of charge transport and scattering mechanisms in graphene. This study demonstrates that femtosecond laser processing is an efficient approach for fabricating high-performance graphene FETs. The proposed fabrication technique is readily applicable to other two-dimensional materials.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"554 ","pages":"Article 130724"},"PeriodicalIF":2.3,"publicationDate":"2025-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253604","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

Testing Eigenstate Thermalization Hypothesis on small-scale quantum processors 在小尺度量子处理器上验证本征态热化假说

IF 2.3 3区物理与天体物理

Physics Letters A Pub Date : 2025-06-03 DOI: 10.1016/j.physleta.2025.130710

Maanav Srihari , Anil Shaji

引用次数: 0