We investigate a bi-layer scheme for circularly polarized infrared thermal radiation. Our approach takes advantage of the strong anisotropy of low-symmetry materials such as β-Ga2O3 and α-MoO3. We numerically report narrow-band, high degree of circular polarization (over 0.85), thermal radiation at two typical emission frequencies related to the excitation of β-Ga2O3 optical phonons. Optimization of the degree of circular polarization is achieved by a proper relative tilt of the crystal axes between the two layers. Our simple but effective scheme could set the basis for a new class of lithography-free thermal sources for IR bio-sensing..
Optimization of highly circularly polarized thermal radiation in α-MoO3/β-Ga2O3 twisted layers / Centini, Marco; Yang, Chiyu; Larciprete, Maria Cristina; Antezza, Mauro; Zhang, Zhuomin M.. - In: JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER. - ISSN 0022-4073. - 323:(2024), p. 109051. [10.1016/j.jqsrt.2024.109051]
Optimization of highly circularly polarized thermal radiation in α-MoO3/β-Ga2O3 twisted layers
Centini, Marco
Primo
Conceptualization
;Larciprete, Maria CristinaInvestigation
;Antezza, MauroFormal Analysis
;
2024
Abstract
We investigate a bi-layer scheme for circularly polarized infrared thermal radiation. Our approach takes advantage of the strong anisotropy of low-symmetry materials such as β-Ga2O3 and α-MoO3. We numerically report narrow-band, high degree of circular polarization (over 0.85), thermal radiation at two typical emission frequencies related to the excitation of β-Ga2O3 optical phonons. Optimization of the degree of circular polarization is achieved by a proper relative tilt of the crystal axes between the two layers. Our simple but effective scheme could set the basis for a new class of lithography-free thermal sources for IR bio-sensing..File | Dimensione | Formato | |
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