Magnetically tunable angle-insensitive multimode absorption in graphene embedded topological photonic heterostrucures

IF 2.8 3区 物理与天体物理 Q2 PHYSICS, CONDENSED MATTER
Gulzar Ali J. , Sanjay Kumar Mohanty , Chittaranjan Nayak
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引用次数: 0

Abstract

This work examines the angle-insensitive multimode absorption characteristics of topological interface states (TISs) in a graphene-embedded hybrid one-dimensional (1D) topological photonic crystal (TPC) heterostructure composed of cascaded TPC. Angle-insensitive photonic bandgap (PBG), aroused in TPC, is achieved using the all-dielectric elliptical metamaterial defined by its filling factor, ρ. Combining two different types of TPC i.e. TPC1 and TPC2, enables angle-insensitive excitation of TISs, leading to angle-insensitive absorption with the presence of graphene at the interface. To achieve multimode absorption, the structures are further cascaded, forming configurations such as TPC1-graphene-TPC2-graphene-TPC1 and TPC1-graphene-TPC2-graphene-TPC1-graphene-TPC2, which exhibit dual-mode, M2 and triple-mode, M3 absorption, respectively. The application of an external magnetic field and variation of Fermi level significantly enhances the maximum absorption, Amax irrespective of the modes.
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来源期刊
Physica B-condensed Matter
Physica B-condensed Matter 物理-物理:凝聚态物理
CiteScore
4.90
自引率
7.10%
发文量
703
审稿时长
44 days
期刊介绍: Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces
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