XXVIII International Symposium ''Nanophysics and Nanoelectronics'', Nizhny Novgorod, 11-15 March 2024

High-Q states in the emission spectra of linear periodic chains of Si nanodisks with embedded GeSi quantum dots

V. A. Zinovyev^a, Zh. V. Smagina^a, A. F. Zinov'eva^ab, E. E. Rodyakina^ab, A. V. Katsyuba^a, P. A. Kuchinskaya^a, K. N. Astankova^a, K. V. Baryshnikova^c, M. I. Petrov^c, M. S. Mikhailovskii^c, V. A. Verbus^de, M. V. Stepikhova^d, A. V. Novikov<sup>fd

a</sup> Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia
^b Novosibirsk State University, 630090 Novosibirsk, Russia
^c ITMO University, 197101 St. Petersburg, Russia
^d Institute for Physics of Microstructures, Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
^e State University – Higher School of Economics, Nizhny Novgorod Branch, 603950 Nizhny Novgorod, Russia
^f Lobachevski State University of Nizhni Novgorod, 603950 Nizhny Novgorod, Russia

Abstract: In this work the luminescent properties of structures with linear periodic chains of Si nanodisks with embedded GeSi quantum dots were studied. It was found that the formation of linear chains of resonators leads to a change in the intensity and directivity of quantum dots emission. Narrow high-Q peaks that are associated with collective modes in linear chains appear in the spectrum. A theoretical analysis of the dependence of the mode quality factor on the parameters of linear chains has shown that, under certain parameters, states that are close in nature to symmetry-protected bound states in the continuum can be realized.

Keywords: luminescence, quantum dots, silicon, germanium, nanodisks, linear chains, collective modes.

Received: 26.04.2024
Revised: 27.04.2024
Accepted: 27.04.2024

DOI: 10.61011/FTP.2024.05.58758.6351H

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