Chiral bilayer all-dielectric metasurfaces
Tanaka K, Arslan D, Fasold S, Steinert M, Sautter J, Falkner M, Pertsch T, Decker M, Staude I (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 14
Pages Range: 15926-15935
Journal Issue: 11
Abstract
Three-dimensional chiral plasmonic metasurfaces were demonstrated to offer enormous potential for ultrathin circular polarizers and applications in chiral sensing. However, the large absorption losses in the metallic systems generally limit their applicability for high-efficiency devices. In this work, we experimentally and numerically demonstrate three-dimensional chiral dielectric metasurfaces exhibiting multipolar resonances and examine their chiro-optical properties. In particular, we demonstrate that record high circular dichroism of 0.7 and optical activity of 2.67 × 105 degree/mm can be achieved based on the excitation of electric and magnetic dipolar resonances inside the chiral structures. These large values are facilitated by a small amount of dissipative loss present in the dielectric nanoresonator material and the formation of a chiral supermode in a 4-fold symmetric metasurface unit cell. Our results highlight the mechanisms for maximizing the chiral response of photonic nanostructures and offer important opportunities for high-efficiency, ultrathin polarizing elements, which can be used in miniaturized devices, for example, integrated circuits.
Involved external institutions
Germany (DE)How to cite
APA:
Tanaka, K., Arslan, D., Fasold, S., Steinert, M., Sautter, J., Falkner, M.,... Staude, I. (2020). Chiral bilayer all-dielectric metasurfaces. ACS nano, 14(11), 15926-15935. https://doi.org/10.1021/acsnano.0c07295
MLA:
Tanaka, Katsuya, et al. "Chiral bilayer all-dielectric metasurfaces." ACS nano 14.11 (2020): 15926-15935.
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