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• W1569591484 abstract "Room-temperature, wavelength-nondegenerate ultrafast pump/probe measurements were performed on GaN and InGaN epilayers and an InGaN multiple quantum well (QW) structure. Carrier relaxation dynamics were investigated as a function of excitation wavelength and intensity. Spectrally resolved sub-picosecond relaxation due to carrier redistribution and QW capture was found to depend sensitively on the wavelength of pump excitation. Moreover, for pump intensities above a threshold of $100ensuremath{mu}{mathrm{J}/mathrm{c}mathrm{m}}^{2},$ all samples demonstrated an additional emission feature arising from stimulated emission (SE). SE is evidenced as accelerated relaxation $(<10mathrm{ps})$ in the pump-probe data, fundamentally altering the redistribution of carriers. Once SE and carrier redistribution is completed, a slower relaxation of up to 1 ns for GaN and InGaN epilayers, and 660 ps for the multiple QW sample, indicates carrier recombination through spontaneous emission." @default.
• W1569591484 created "2016-06-24" @default.
• W1569591484 creator A5050851020 @default.
• W1569591484 creator A5083467114 @default.
• W1569591484 date "2003-04-11" @default.
• W1569591484 modified "2023-10-18" @default.
• W1569591484 title "Ultrafast carrier relaxation in GaN,<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>In</mml:mi></mml:mrow><mml:mrow><mml:mn>0.05</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Ga</mml:mi></mml:mrow><mml:mrow><mml:mn>0.95</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi mathvariant=normal>N</mml:mi><mml:mo>,</mml:mo></mml:math>and an<mml:math xmlns:mml=http…" @default.
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• W1569591484 doi "https://doi.org/10.1103/physrevb.67.155308" @default.
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