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Proceedings Paper

Ultrafast intersubband relaxation dynamics and coherent nonlinearity in GaN/AlN multiple quantum wells
Author(s): J. Hamazaki; K. Ikuno; H. Takahashi; H. Kunugita; K. Ema; A. Kikuchi; K. Kishino
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Paper Abstract

We have investigated the ultrafast coherent dynamics of the intersubband transition in GaN/AlN multiple quantum wells, using a spectral resolved two-color pump-probe technique. We have found a significant spectrum change as a function of the delaytime τ. For negative delaytimes corresponding to τ < 0, coherent spectrum oscillations have been observed. At τ ~ 0, asymmetric dispersion has been observed. For positive delaytimes, τ > 0, no measurable spectrum change has been observed. From the analysis of these results, we have estimated that intersubband transitions dephasing time is more than 100 fs measured at room temperature.

Paper Details

Date Published: 15 February 2006
PDF: 9 pages
Proc. SPIE 6118, Ultrafast Phenomena in Semiconductors and Nanostructure Materials X, 61180C (15 February 2006); doi: 10.1117/12.641316
Show Author Affiliations
J. Hamazaki, Hokkaido Univ. (Japan)
K. Ikuno, Sophia Univ. (Japan)
H. Takahashi, Sophia Univ. (Japan)
H. Kunugita, Sophia Univ. (Japan)
K. Ema, Sophia Univ. (Japan)
A. Kikuchi, Sophia Univ. (Japan)
K. Kishino, Sophia Univ. (Japan)

Published in SPIE Proceedings Vol. 6118:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials X
Kong-Thon Tsen; Jin-Joo Song; Hongxing Jiang, Editor(s)

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