Abstract
Are excitons involved in lasing in ZnO nanowires or not? Our recently developed and experimentally tested quantum many-body theory sheds new light on this question. We measured the laser thresholds and Fabry-Pérot laser modes for three radically different excitation schemes. The thresholds, photon energies, and mode spacings can all be explained by our theory, without invoking enhanced light-matter interaction, as is needed in an earlier excitonic model. Our conclusion is that lasing in ZnO nanowires at room temperature is not of excitonic nature, as is often thought, but instead is electron-hole plasma lasing.
- Received 16 January 2012
DOI:https://doi.org/10.1103/PhysRevLett.108.157402
© 2012 American Physical Society
Synopsis
Nanowire Lasing Explained
Published 12 April 2012
A careful reassessment of zinc oxide nanolasers finds that the electrons and holes in the material are not bound together as others have suggested.
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