Spin-orbit coupling effects on transmission and absorption of electromagnetic waves in gapped graphene armchair nanoribbon

IF 4 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Optical and Quantum Electronics Pub Date : 2025-03-27 DOI:10.1007/s11082-025-08155-7

H. Rezania, A. Abdi

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Abstract

We compute the optical absorption, density of states and optical coefficients of graphene armchair nanoribbon under spin-orbit coupling effects. Kane–Mele model Hamiltonian has been applied for obtaining electronic band structure of graphene armchair nanoribbon in the presence of magnetic field and gap parameter. The effects of magnetic field and spin-orbit coupling strength on the frequency behavior of optical absorption of graphene armchair nanoribbon have been investigated. Also the frequency behavior of optical absorption of gapped graphene armchair nanoribbon has been studied due to magnetic field, spin-orbit coupling and gap parameter. Linear response theory and Green’s function approach have been exploited to obtain the frequency behavior of optical behavior of the structure. Moreover, the transmissivity and reflectivity of electromagnetic wave between two media separated by a graphene armchair nanoribbon are given. Our numerical results indicate that the frequency dependence of optical absorption includes a peak due to applying magnetic field. Also the frequency dependence of transmissivity and reflectivity of electromagnetic wave between two media separated by graphene armchair nanoribbon for normal incidence has been investigated due to effects of magnetic fields and spin-orbit coupling.

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自旋轨道耦合对电磁波在间隙石墨烯扶手椅纳米带中传输和吸收的影响

计算了石墨烯扶手椅纳米带在自旋-轨道耦合作用下的光吸收、态密度和光学系数。采用Kane-Mele模型哈密顿量计算了石墨烯扶手椅纳米带在磁场和间隙参数存在下的电子能带结构。研究了磁场和自旋轨道耦合强度对石墨烯扶手椅纳米带光吸收频率行为的影响。研究了磁场、自旋轨道耦合和间隙参数对石墨烯扶手椅纳米带光吸收频率的影响。利用线性响应理论和格林函数方法获得了结构光学特性的频率特性。此外，还给出了电磁波在以石墨烯扶手椅纳米带分隔的两种介质之间的透射率和反射率。我们的数值结果表明，光吸收的频率依赖性包括一个由于施加磁场而产生的峰值。此外，还研究了在磁场和自旋轨道耦合作用下，两种由石墨烯扶手椅纳米带分隔的介质在正入射情况下，电磁波的透射率和反射率与频率的关系。

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来源期刊

Optical and Quantum Electronics 工程技术-工程：电子与电气

CiteScore

4.60

自引率

20.00%

发文量

810

审稿时长

3.8 months

期刊介绍： Optical and Quantum Electronics provides an international forum for the publication of original research papers, tutorial reviews and letters in such fields as optical physics, optical engineering and optoelectronics. Special issues are published on topics of current interest. Optical and Quantum Electronics is published monthly. It is concerned with the technology and physics of optical systems, components and devices, i.e., with topics such as: optical fibres; semiconductor lasers and LEDs; light detection and imaging devices; nanophotonics; photonic integration and optoelectronic integrated circuits; silicon photonics; displays; optical communications from devices to systems; materials for photonics (e.g. semiconductors, glasses, graphene); the physics and simulation of optical devices and systems; nanotechnologies in photonics (including engineered nano-structures such as photonic crystals, sub-wavelength photonic structures, metamaterials, and plasmonics); advanced quantum and optoelectronic applications (e.g. quantum computing, memory and communications, quantum sensing and quantum dots); photonic sensors and bio-sensors; Terahertz phenomena; non-linear optics and ultrafast phenomena; green photonics.