Spectroscopy of condensed matter

Spectral fluorescent study of Rhodamine 6G molecules embedded in different layers of one-dimensional polymer-based photonic crystals

Yu. A. Strokova, A. M. Saletskii

Lomonosov Moscow State University, Faculty of Physics, 119991 Moscow, Russia

Abstract: The spectral characteristics of the fluorescence of Rhodamine 6G (Rh6G) molecules doped into different layers of one-dimensional photonic crystals (PCs) have been studied at various detection angles. The studied PCs differ in the spectral position of the photonic band gap (PBG) with respect to the Rh6G luminescence spectrum. A computation method of the density of PC's electromagnetic modes have been proposed. The spectral characteristics of Rh6G fluorescence and computed relative density of electromagnetic modes versus the wavelength have been compared for different detection angles. The experimental and theoretical dependences demonstrate good agreement.

Keywords: photonic crystals, photonic band gap, density of electromagnetic modes, spin-coating method, polymers, cellulose acetate, poly(N-vinylcarbazole), dye, Rhodamine 6G, fluorescence spectra.

Received: 24.06.2022
Revised: 11.10.2022
Accepted: 12.10.2022

DOI: 10.21883/OS.2022.12.54086.3859-22

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