Study on electromagnetically induced transparency effects in Dirac and VO\(_2\) hybrid material structure

In this paper, we present a metamaterial structure of Dirac and vanadium dioxide and investigate its optical properties using the finite-difference time-domain (FDTD) technique. Using the phase transition feature of vanadium dioxide, the design can realize active tuning of the PIT effect at terahert...

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Bibliographic Details
Published inarXiv.org
Main Authors Ke, Di, Xie Meng, Xia Hua Rong, Cheng An Yu, Liu, Yu, Du Jia Jia
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 19.12.2023
Subjects
Insulation
Metamaterials
Optical properties
Phase transitions
Refractivity
Resonant frequencies
Terahertz frequencies
Time domain analysis
Vanadium dioxide
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Summary:In this paper, we present a metamaterial structure of Dirac and vanadium dioxide and investigate its optical properties using the finite-difference time-domain (FDTD) technique. Using the phase transition feature of vanadium dioxide, the design can realize active tuning of the PIT effect at terahertz frequency, thereby converting from a single PIT to a double PIT. When VO\(_2\) is in the insulating state, the structure is symmetric to obtain a single-band PIT effect; When VO\(_2\) is in the metallic state, the structure turns asymmetric to realize a dual-band PIT effect. This design provides a reference direction for the design of actively tunable metamaterials. Additionally, it is discovered that the transparent window's resonant frequency and the Dirac material's Fermi level in this structure have a somewhat linear relationship. In addition, the structure achieves superior refractive index sensitivity in the terahertz band, surpassing 1 THz/RIU. Consequently, the concept exhibits encouraging potential for application in refractive index sensors and optical switches.
ISSN:2331-8422