Optical pumped stimulated emission in ZnO-based quantum wells grown by PLD

A. A. Lotin; O. A. Novodvorsky; D. A. Zuev; L. S. Parshina; O. D. Khramova

doi:10.1117/12.928897

19 October 2012 Optical pumped stimulated emission in ZnO-based quantum wells grown by PLD

A. A. Lotin, O. A. Novodvorsky, D. A. Zuev, L. S. Parshina, O. D. Khramova

Proceedings Volume 8463, Nanoengineering: Fabrication, Properties, Optics, and Devices IX; 84630I (2012) https://doi.org/10.1117/12.928897
Event: SPIE NanoScience + Engineering, 2012, San Diego, California, United States

Abstract

Two series of Mg_xZn_1-xO/ZnO multiple quantum wells with 18 at.% and 27 at.% of magnesium content in barrier layers and well width L_w from 1 nm to 20 have been grown by pulsed laser deposition method. The stimulated emission is observed in photoluminescence spectra excited by pulsed laser (λ_exc=248 nm). The pump density threshold of stimulated emission nonmonotonously depends on the well width that is associated with an increase of the internal quantum efficiency of two-dimensional structures caused by a reduction of radiative lifetime of excitons at decreasing of the well width as it has been shown by the time-resolved photoluminescence spectra analysis. The minimum value of a lifetime τ_r=355 ps was obtained for the Mg_0.27Zn_0.73O/ZnO MQW with the well width L_w=2.6 nm.

Citation Download Citation

A. A. Lotin, O. A. Novodvorsky, D. A. Zuev, L. S. Parshina, and O. D. Khramova "Optical pumped stimulated emission in ZnO-based quantum wells grown by PLD", Proc. SPIE 8463, Nanoengineering: Fabrication, Properties, Optics, and Devices IX, 84630I (19 October 2012); https://doi.org/10.1117/12.928897

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