Absorption dynamics of type-II GaSb/GaAs quantum dots

Komolibus, K. and Piwonski, T. and Reyner, C. J. and Liang, B. and Huyet, G. and Huffaker, D. L. and Viktorov, E. A. and Houlihan, J. (2017) Absorption dynamics of type-II GaSb/GaAs quantum dots. Optical Materials Express, 7 (4). p. 1424. ISSN 2159-3930

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Abstract

In this paper room temperature pump-probe spectroscopy is employed to study ultrafast absorption dynamics in type-II GaSb/GaAs quantum dots (QDs). Our results identify a strong 3-5 ps timescale which is reproduced using a rate equation model and thereby associated with hole recapture by the QD following higher order absorption of part of the pump pulse into barrier layers. The strength of the component is attributed to cancelling effects in the gain and phase dynamics as a result of the carrier dependence of emission frequency that is characteristic of type-II structures.

Item Type:	Article
Additional Information:	Publisher Copyright: © 2017 Optical Society of America.
Uncontrolled Keywords:	/dk/atira/pure/subjectarea/asjc/2500/2504
Departments or Groups:
Depositing User:	Admin SSL
Date Deposited:	19 Oct 2022 23:03
Last Modified:	15 Aug 2023 19:50
URI:	http://repository-testing.wit.ie/id/eprint/3847

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