Liquid crystal as laser medium with tunable gain spectra.
Amplified spontaneous emission intensity and gain spectra in polarized light have been measured in a dye doped nematic liquid crystal for different orientation of its optical axis and pump intensity. A possibility for switching the gain of the liquid crystal by an external electric field is shown experimentally. The liquid crystal materials with field controlled gain can be used in microlasers and light micro-amplifiers in both planar and waveguiding geometry.
Laboratorio Regionale LICRYL INFM-CNR and CEMIF.CAL - Department of Physics, Università della Calabria, 87036 Rende (CS), Italy. blinov@fis.unical.it
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Blinov
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Cipparrone
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Lazarev
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Pagliusi
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Rugiero
D000669:Amplifiers, Electronic; D007834:Lasers; D050866:Liquid Crystals / Q000737:chemistry*; D013057:Spectrum Analysis