OPTICS AND NUCLEAR PHYSICS

Spectrally selective metamirror based on trimers of spherical transition metal dichalcogenide nanoparticles

A. V. Shesterikov^ab, M. Yu. Gubin^ab, A. V. Arsenin^a, V. S. Volkov^c, A. V. Prokhorov<sup>ab

a</sup> Center for Photonics and Two-Dimensional Materials, Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow region, 141701 Russia
^b Vladimir State University named after Alexander and Nikolay Stoletov (VlSU), Vladimir, 600000 Russia
^c Emerging Technologies Research Center, XPANCEO, Dubai, UAE

Abstract: The optical properties of trimers consisting of spherical transition metal dichalcogenide nanoparticles have been studied. It has been shown that a strong bianisotropic response in a trimer of MoS$_2$ and WS$_2$ nanoparticles can be excited by optimizing the composition and geometric parameters. It has been established that bianisotropic resonance responses for different trimer nanoparticles lie at different wavelengths, which makes it possible to desing an irregular metasurface from them supporting two quasitrapped modes simultaneously. The designed metasurface provides a high reflectance in the spectral range between two quasitrapped mode resonances and can be used as a spectral metamirror with tunable characteristics.

Received: 26.02.2025
Revised: 10.04.2025
Accepted: 11.04.2025

DOI: 10.31857/S0370274X25050157

 English version: Journal of Experimental and Theoretical Physics Letters, 2025, 121:10, 771–777