Journal
APPLIED PHYSICS LETTERS
Volume 79, Issue 9, Pages 1249-1251Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1391406
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Experimental evidence of population inversion and amplified spontaneous emission was found for Si nanocrystallites embedded in SiO2 surrounding under pumping with 5 ns light pulses at 380, 400, and 500 nm. As an important property, our experiments show a short lifetime of the population inversion allowing a generation of short (a few nanosecond) amplified light pulses in the Si/SiO2 lattice. The estimate for optical gain in the present samples is 6 cm(-1) at 720 nm. (C) 2001 American Institute of Physics.
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