Large coherent acoustic-phonon oscillation observed in InGaN/GaN multiple-quantum wells

Large coherent acoustic-phonon oscillation observed in InGaN/GaN multiple-quantum wells

We have observed coherent acoustic-phonon oscillation in InGaN/GaN multiple-quantum wells. With femtosecond pulse excitation, photogenerated carriers screen out the strained-induced piezoelectric field and initiate the coherent acoustic-phonon oscillation. The resulted modulation of the piezoelectri...

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Veröffentlicht in:Applied physics letters 1999-08, Vol.75 (9), p.1249-1251
Hauptverfasser: Sun, Chi-Kuang, Liang, Jian-Chin, Stanton, Christopher J., Abare, Amber, Coldren, Larry, DenBaars, Steven P.
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Sprache:eng
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Zusammenfassung:We have observed coherent acoustic-phonon oscillation in InGaN/GaN multiple-quantum wells. With femtosecond pulse excitation, photogenerated carriers screen out the strained-induced piezoelectric field and initiate the coherent acoustic-phonon oscillation. The resulted modulation of the piezoelectric field will then cause large optical property oscillation through the quantum-confined Stark effect.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.124657