Optical properties

Hybrid spherical microresonators with luminescent organic dyes FITC and DCM

A. A. Dukin, D. A. Eurov, E. Yu. Stovpyaga, A. N. Smirnov, D. A. Kurdyukov, V. G. Golubev

Ioffe Institute, St. Petersburg, Russia

Abstract: Luminescent hybrid spherical microresonators of two types consisting of monodisperse spherical silica particles with a diameter of 3.5 $\mu$m coated with either FITC dye molecules or a 200 nm thick mesoporous silica shell containing DCM dye are fabricated. The luminescence spectra of microresonators are studied and the experimental emission spectra are simulated using the method of spherical wave transfer matrices. The ratio of intensities of emission lines into whispering gallery modes with different polarizations and the same polar and radial indices is analyzed. It is shown that the ratio depends on the orientation of the dipole moment of the radiative transition of dye molecules relative to the surface of spherical silica particles.

Keywords: spherical microresonator, whispering gallery modes, organic dyes, photoluminescence.

Received: 04.04.2023
Revised: 04.04.2023
Accepted: 16.04.2023

DOI: 10.21883/FTT.2023.06.55667.52

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