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- W1974702947 abstract "We have observed the lasing of submicron-sized ZnO particle in a Fabry-Perot cavity at low temperatures. A thin alkali-halide crystal including a small amount of ZnO particles are sandwiched between two quartz plates arranged as a pair of opposite mirrors, that is, a Fabry-Perot cavity. Under low excitation due to a He–Cd laser, emissions of free and bound excitons and their phonon replicas are recognized markedly, while a biexciton emission band appears under high-dense excitation by a pulsed N2 laser. Biexciton lasing is demonstrated as a narrowed emission by focusing the excitation light beam on an appropriate position being a ZnO particle in the cavity. When a cavity length satisfies the resonant condition, the lasing occurs in the spectral region of the biexciton emission band and with the very small divergence angle. The obtained threshold of excitation-power density is about 0.50MW∕cm2. We discuss lasing in terms of stimulated emission caused by population inversion between biexciton and exciton states." @default.
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- W1974702947 date "2005-11-01" @default.
- W1974702947 modified "2023-09-26" @default.
- W1974702947 title "Biexciton lasing of submicron-sized ZnO particle in a Fabry-Perot cavity" @default.
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- W1974702947 doi "https://doi.org/10.1063/1.2128690" @default.
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