The 18th International Theophilus Symposium (IFAC-2022) on Spectroscopy of Crystals Activated by Ions of Rare Earths and Transition Metals (August 22-26, 2022, Moscow)
Nanophotonics

Microspectroscopy of single color centers in alkaline halide crystals

E. F. Martynovich, S. A. Zilov, V. P. Dresvyanskiy

Institute of Lazer Physics of Russian Academy of Sciences, Irkutsk Branch, Irkutsk, Russia

Abstract: Single color centers in the LiF crystal were studied by confocal fluorescence microscopy with analysis and statistical processing of the time dependences of their fluorescence intensity. The possibility of identifying quantum systems whose selection by luminescence excitation (absorption) spectra, luminescence spectra, and luminescence decay time is difficult due to their overlap or due to the coincidence of the corresponding characteristics of different centers is shown. An additional identification feature in this case is the flicker frequency and other characteristics of the time dependences of the luminescence intensity. The efficiency of the method is demonstrated by the example of two color centers of different nature (F$_2$ and F$_3$, stabilized by an impurity–vacancy dipole) in a lithium fluoride crystal.

Keywords: fluorescence, single color center, confocal microscopy, spectroscopy.

Received: 15.11.2022
Revised: 17.02.2023
Accepted: 21.02.2023

DOI: 10.21883/OS.2023.05.55719.73-22

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