Gain spectroscopy of excitonic molecules and its dynamics in a ZnSe single quantum well

V. Kozlov; P. Kelkar; A. Vertikov; A. V. Nurmikko; C.-C. Chu; J. Han; C. G. Hua; R. L. Gunshor

doi:10.1103/PhysRevB.54.13932

Gain spectroscopy of excitonic molecules and its dynamics in a ZnSe single quantum well

V. Kozlov, P. Kelkar, A. Vertikov, A. V. Nurmikko, C.-C. Chu, J. Han, C. G. Hua, and R. L. Gunshor

Phys. Rev. B 54, 13932 – Published 15 November 1996

Abstract

We demonstrate spectroscopically how optical gain is formed in an interacting system of excitons and biexcitons in a single ZnSe quantum well. The dynamics of gain formation are studied on a subpicosecond time scale in pump-probe experiments, revealing the influence of coherent effects and the impact of exciton-exciton and exciton-biexciton interactions. Spectrally resolved, polarization-dependent degenerate four-wave-mixing experiments further demonstrate how the excitonic many-body phenomena profoundly influence the nonlinear optical response in this II-VI semiconductor heterostructure. © 1996 The American Physical Society.

Received 31 May 1996

DOI:https://doi.org/10.1103/PhysRevB.54.13932

Authors & Affiliations

V. Kozlov, P. Kelkar, A. Vertikov, and A. V. Nurmikko

Division of Engineering and Department of Physics, Brown University, Providence, Rhode Island 02912

C.-C. Chu, J. Han, C. G. Hua, and R. L. Gunshor

School of Electrical Engineering, Purdue University, West Lafayette, Indiana 47907

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Vol. 54, Iss. 19 — 15 November 1996

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Physical Review B

covering condensed matter and materials physics