Optical properties, photonics

Resonant reflection of light from a periodic system of quasi-two-dimensional layers of Bi nanoparticles in GaAs

E. D. Polenok^ab, V. V. Preobrazhenskii^c, M. A. Putyato^c, B. R. Semyagin^c, N. S. Potapovich^a, V. P. Khvostikov^a, V. I. Ushanov^a, V. V. Chaldyshev<sup>a

a</sup> Ioffe Institute, St. Petersburg
^b St. Petersburg National Research University of Information Technologies, Mechanics and Optics
^c Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk

Abstract: We show the possibility of creation and study the optical properties of a structure, which is composed of an epitaxial GaAs matrix with an embedded periodic sequence of quasi-two-dimensional layers of Bi nanoinclusions. In the optical reflectance spectra of this structure, we reveal a resonant peak originated from the Bragg diffraction of electromagnetic waves scattered on the system of the nanoinclusions. The significant amplitude of the reflection peak (approximately 15% at normal light incidence) is observed since the wavelength of the Bragg resonance is close to the wavelength of the localized surface plasmon resonance in the system of bismuth nanoparticles embedded in the gallium arsenide matrix.

Keywords: GaAs, Bi, optical properties, plasmonic resonance, nanoparticles.

Received: 31.10.2025
Revised: 31.10.2025
Accepted: 01.11.2025

DOI: 10.61011/FTT.2025.11.62149.308-25

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