1. Lasing in imperfectly aligned cholesterics.
- Author
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Dudok TH, Savaryn VI, Krupych OM, Fechan AV, Lychkovskyy E, Cherpak VV, Pansu B, and Nastishin YA
- Subjects
- Cholesterol radiation effects, Glass, Liquid Crystals, Optical Phenomena, Spectrometry, Fluorescence, Spectrophotometry, Cholesterol chemistry, Lasers, Dye
- Abstract
Optically pumped light emissions in imperfectly aligned dye-doped cholesteric cells with glance and frosted glass substrates of three different cell gap thicknesses are experimentally studied. Alignment imperfections show up in emission spectra by a broadening of the photonic bandgap (PhBG) lasing (allowed) lines at short- and long-wavelength PhBG edges and by an additional (forbidden) emission line inside the PhBG. Forbidden and allowed lines differ distinctively by their stability in the course of pumping. The origin of the forbidden line is discussed.
- Published
- 2015
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