Low-threshold lasing at the edge of a photonic stop band in cholesteric liquid crystals.
نویسندگان
چکیده
Low-threshold lasing is observed at the edge of the stop band of a one-dimensional structure-a dye-doped cholesteric liquid-crystal film. The mode closest to the edge has the lowest lasing threshold. The rates of spontaneous and stimulated emission are suppressed within the stop band and enhanced at the band edge. The ratio of right to left circularly polarized spontaneous emission is in good agreement with calculated density of photon states.
منابع مشابه
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ورودعنوان ژورنال:
- Optics letters
دوره 23 21 شماره
صفحات -
تاریخ انتشار 1998