Abstract
Continuous-wave photoluminescence excitation spectra of multiple, narrow, slightly asymmetric coupled quantum wells at room temperature have been measured. As the laser intensity increases, the photoluminescence intensity initially increases at a rate that is higher than square-law dependence and finally approaches square-law dependence. This phenomenon can be attributed to the process in which a dominant nonradiative recombination at the traps undergoes strong saturation with weak radiative recombination of free carriers. The intensity-dependent trapping efficiency and ratio between electron and hole nonradiative decay times, and the ratio between trapping and nonradiative recombination rates have been determined from the experiment.
© 1993 Optical Society of America
Full Article | PDF ArticleMore Like This
A. G. Cui, Y. J. Ding, S. J. Lee, J. V. D. Veliadis, J. B. Khurgin, S. Li, D. C. Reynolds, and J. Grata
J. Opt. Soc. Am. B 13(3) 536-545 (1996)
C. L. Guo, Y. J. Ding, S. Li, J. B. Khurgin, C. T. Law, A. E. Kaplan, K. K. Law, L. A. Coldren, and J. Stellato
Opt. Lett. 16(12) 949-951 (1991)
Daniel Mahgerefteh and Elsa Garmire
Opt. Lett. 18(8) 616-618 (1993)