Optical gain in dye-impregnated oxidized porous silicon waveguides

Oton, C. J.; Navarro Urrios, D.; Ghulinyan, Mher; Capuj, N.; González Pérez, S.; Lahoz, F.; Martín, I.; Pavesi, L.

doi:10.1063/1.2219121

Positive optical gain under pulsed excitation in oxidized porous silicon planar waveguides impregnated with Nile blue (LC 6900) is reported. Amplified spontaneous emission measurements show a dramatic line narrowing when the pump energy is increased, together with a strong superlinear behavior. Variable stripe length measurements were performed to characterize quantitatively the amplification, and an unambiguous transition from losses to gain is observed with a threshold of ~3 mJ/cm2 at 700 nm. A maximum gain coefficient of 8.7 cm−1 (~40 dB/cm) is reported. Shifting excitation spot measurements confirm the reliability of our results. This system is interesting in view of an optically pumped silicon-based pulsed laser.

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Titolo:	Optical gain in dye-impregnated oxidized porous silicon waveguides
Autori:	C. J. Oton D. Navarro Urrios Ghulinyan, Mher N. Capuj S. González Pérez F. Lahoz I. Martín L. Pavesi mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2006
Rivista:	APPLIED PHYSICS LETTERS
Abstract:	Positive optical gain under pulsed excitation in oxidized porous silicon planar waveguides impregnated with Nile blue (LC 6900) is reported. Amplified spontaneous emission measurements show a dramatic line narrowing when the pump energy is increased, together with a strong superlinear behavior. Variable stripe length measurements were performed to characterize quantitatively the amplification, and an unambiguous transition from losses to gain is observed with a threshold of ~3 mJ/cm2 at 700 nm. A maximum gain coefficient of 8.7 cm−1 (~40 dB/cm) is reported. Shifting excitation spot measurements confirm the reliability of our results. This system is interesting in view of an optically pumped silicon-based pulsed laser.
Handle:	http://hdl.handle.net/11582/19781
Appare nelle tipologie:	1.1 Articolo in rivista

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