Issue 7, 2020

Reconfigurable all-dielectric Fano metasurfaces for strong full-space intensity modulation of visible light

Abstract

Dynamically reconfigurable nanoscale tuning of visible light properties is one of the ultimate goals both in the academic field of nanophotonics and the optics industry demanding compact and high-resolution display devices. Among various efforts incorporating actively reconfigurable optical materials into metamaterial structures, phase-change materials have been in the spotlight owing to their optical tunability in wide spectral regions including the visible spectrum. However, reconfigurable modulation of visible light intensity has been limited with small modulation depth, reflective schemes, and a lack of profound theoretical background for universal design rules. Here, all-dielectric phase-change Fano metasurface gratings are demonstrated for strong dynamic full-space (reflection and transmission) modulation of visible intensities based on Fano resonances. By judicious periodic couplings between densely arranged meta-atoms containing VO2, phase-change induced thermo-optic modulation of full-space intensities is highly enhanced in the visible spectrum. By providing intuitive design rules, we envision that the proposed study would contribute to nanophotonics-enabled optoelectronics technologies for imaging and sensing.

Graphical abstract: Reconfigurable all-dielectric Fano metasurfaces for strong full-space intensity modulation of visible light

Supplementary files

Article information

Article type
Communication
Submitted
03 mar 2020
Accepted
24 apr 2020
First published
27 apr 2020
This article is Open Access
Creative Commons BY-NC license

Nanoscale Horiz., 2020,5, 1088-1095

Reconfigurable all-dielectric Fano metasurfaces for strong full-space intensity modulation of visible light

S. Kim, I. Kim, S. Choi, H. Yoon, C. Kim, Y. Lee, C. Choi, J. Son, Y. W. Lee, J. Rho and B. Lee, Nanoscale Horiz., 2020, 5, 1088 DOI: 10.1039/D0NH00139B

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