Temperature-dependent circular conversion dichroism from chiral metasurfaces patterned in Dirac semimetal Cd3As2
- 15 May 2021
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Physical Chemistry Chemical Physics
- Vol. 23 (23), 13128-13135
- https://doi.org/10.1039/d1cp00963j
Abstract
Chiral metasurfaces patterned with L-shaped holes in a thin film of Dirac semimetal Cd3As2 are designed. The impact of temperature T on circular conversion dichroism, mainly characterized by the circular polarization differential transmittance (CPDT), is studied by use of the rigorous coupled-wave analysis. Results show that decreasing T will give rise to the appearance of much more narrow CPDT peaks and dips, and the maximum differential transmittance between two opposite circularly polarized light can reach above 0.60 by optimizing the structural parameters at 80 K. As the T increases, the differential transmittance gradually decreases, and the CPDT peak and dip values exhibit the variation tendencies of ‘Z’ and ‘S’ types, respectively. Two simple formulas of CPDT extreme values with respect to T are derived, predicting that the decreasing tendency will reach saturation when T ≥ 500 K. Differing from the wavelength-independent variation trend of differential transmittance, CPDT extremum positions mainly show a blueshift (redshift) tendency at the wavelength λ > 10 μm (λ < 5 μm) as the T increases. Moreover, evolutions of CPDT with various factors including the thickness of Cd3As2, incident and azimuth angles are also clearly unveiled.Funding Information
- National Natural Science Foundation of China (11804251)
- Natural Science Foundation of Tianjin City (18JCYBJC87100)
This publication has 47 references indexed in Scilit:
- Advanced Jones calculus for the classification of periodic metamaterialsPhysical Review A, 2010
- Planar metamaterial with transmission and reflection that depend on the direction of incidenceApplied Physics Letters, 2009
- Scattering-matrix analysis of periodically patterned multilayers with asymmetric unit cells and birefringent mediaPhysical Review B, 2008
- Study of Effect of Seam on Wire-Grid Polarizer Efficiency Using Rigorous Coupled-Wave AnalysisJapanese Journal of Applied Physics, 2007
- Two-dimensional gas of massless Dirac fermions in grapheneNature, 2005
- Experimental Demonstration of Near-Infrared Negative-Index MetamaterialsPhysical Review Letters, 2005
- Scattering-matrix treatment of patterned multilayer photonic structuresPhysical Review B, 1999
- Use of Fourier series in the analysis of discontinuous periodic structuresJournal of the Optical Society of America A, 1996
- Highly improved convergence of the coupled-wave method for TM polarizationJournal of the Optical Society of America A, 1996
- Cryogenic refractive indices and temperature coefficients of cadmium telluride from 6 μm to 22 μmApplied Optics, 1979