【摘 要】
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A wedge liquid crystal (LC) cell is designed and manufactured,and a dye-doping cholesteric LC laser formed by mutual diffusion of the cholesteric LC with differ
【机 构】
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School of Science, Shenyang Ligong University, Shenyang 110159“,”State Key Laboratory of Applied Opt
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A wedge liquid crystal (LC) cell is designed and manufactured,and a dye-doping cholesteric LC laser formed by mutual diffusion of the cholesteric LC with different pitches.A laser that is tunable in the 558-624 nm range is obtained under moderate optical pumping,with a tuning range of 66nm and a laser spectral tuning resolution of 1 nm,so as to achieve the spatial position of a wide range of tunable lasers.The laser threshold varies at different positions in the device,and the lasing thresholds of the dye-doping cholesteric LC cell at 40 and 9 μm are 18 and 25 μJ/pulse,respectively.The density of the photonic states is simulated in the experimental sample,and the result is in good agreement with the photonic band gap in our experiment,which not only explains thelow-threshold laser at the band gap edge,but also predicts the experiment.
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