[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.3807/COPP.2021.5.2.134

Broadband Phase-change Metagrating Design for Efficient Active Reflection Steering

Kim, Sun-Je (Department of Physics, Myongji University)

Publication Information

Current Optics and Photonics / v.5, no.2, 2021 , pp. 134-140 More about this Journal

Abstract

In this paper, I introduce a novel design method of a high performance nanophotonic beam deflector providing broadband operation, large active tunability, and signal efficiency, simultaneously. By combining thermo-optically tunable vanadium dioxide nano-ridges and a metallic mirror, reconfigurable local optical phase of reflected diffraction beams can be engineered in a desired manner over broad bandwidth. The active metagrating deflectors are systematically designed for tunable deflection of reflection beams according to the thermal phase-change of vanadium dioxide nano-ridges. Moreover, by multiplexing the phase-change supercells, a robust design of actively tunable beam splitter is also verified numerically. It is expected that the proposed intuitive and simple design method would contribute to development of next-generation optical interconnects and spatial light modulators with high performances. The author also envisions that this study would be fruitful for modern holographic displays and three-dimensional depth sensing technologies.

Keywords

Grating; Diffraction; Metasurface; Subwavelength structures; Spatial light modulator;

Citations & Related Records

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