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13 March 2024 Topological nodal ring semimetals as new hyperbolic materials for infrared and terahertz applications
Alexey Belyanin, Ashutosh Singh, Maria Sebastian, Yuanping Chen, Po-Yao Chang
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Proceedings Volume PC12905, Novel In-Plane Semiconductor Lasers XXIII; PC129050O (2024) https://doi.org/10.1117/12.3005045
Event: SPIE OPTO, 2024, San Francisco, California, United States
Abstract
We study optical response and the electromagnetic wave propagation in an emerging class of topological materials named nodal ring semimetals, in which the low-energy quasiparticle dispersion is parabolic in two directions in momentum space and is linear in the third direction. This leads to a highly anisotropic dielectric permittivity tensor in which the optical response is plasmonic in one spatial direction and dielectric in the other two directions. The resulting normal modes (polaritons) in the bulk material become hyperbolic over a broad frequency range, which is furthermore tunable by the doping level. These tunable hyperbolic materials show a range of fascinating optical properties from anomalous refraction and waveguiding to perfect absorption in ultrathin subwavelength films. They promise a broad range of the optoelectronic applications in the infrared an terahertz spectral regions.
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Alexey Belyanin, Ashutosh Singh, Maria Sebastian, Yuanping Chen, and Po-Yao Chang "Topological nodal ring semimetals as new hyperbolic materials for infrared and terahertz applications", Proc. SPIE PC12905, Novel In-Plane Semiconductor Lasers XXIII, PC129050O (13 March 2024); https://doi.org/10.1117/12.3005045
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KEYWORDS
Infrared radiation
Metalloids
Infrared materials
Dielectrics
Plasmonics
Polaritons
Quasiparticles
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