Gain Saturation in (In,Ga)N/GaN/(Al,Ga)N Laser Structures

Autor:	Peter Michler, H.‐J. Lugauer, Volker Härle, Jürgen Gutowski, O. Lange, Martin Vehse, Stefan Bader, Berthold Hahn
Rok vydání:	2000
Předmět:	Modal gain Chemistry Analytical chemistry Photon energy Condensed Matter Physics Laser Molecular physics Electronic Optical and Magnetic Materials law.invention Gain factor law Saturation (magnetic) Quantum well Excitation
Zdroj:	physica status solidi (a). 180:391-396
ISSN:	1521-396X 0031-8965
DOI:	10.1002/1521-396x(200007)180:1<391::aid-pssa391>3.0.co;2-n
Popis:	We performed systematic studies of the optical gain and its saturation in (In,Ga)N/GaN/(Al,Ga)N laser structures in dependence on photon energy, excitation density and number of quantum wells. The optical gain and its saturation were obtained by means of the variable stripe-length method under quasi-stationary conditions. The unsaturated gain factor increases with increasing excitation power, i.e increasing modal gain, and reaches its maximum at energies slightly below the spectral position of the gain maximum. High unsaturated gain factors of up to 40 dB at 300 K have been measured.
Databáze:	OpenAIRE
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