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Gain in a quantum wire laser of high uniformity

A multi-quantum wire laser operating in the 1-D ground state has been achieved in a very high uniformity structure that shows free exciton emission with unprecedented narrow width and low lasing threshold. Under optical pumping the spontaneous emission evolves from a sharp free exciton peak to a red-shifted broad band. The lasing photon energy occurs about 5 meV below the free exciton. The observed shift excludes free excitons in lasing and our results show that Coulomb interactions in the 1-D electron-hole system shift the spontaneous emission and play significant roles in laser gain.

preprint2002arXivOpen access
Hidefumi AkiyamaLoren N. PfeifferMasahiro YoshitaAron PinczukPeter B. LittlewoodKen W. WestManyalibo J. MatthewsJames Wynn
cond-mat.mes-hallcond-mat.mtrl-sci
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Open access8 authors2 topics
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Hidefumi AkiyamaLoren N. PfeifferMasahiro YoshitaAron PinczukPeter B. LittlewoodKen W. WestManyalibo J. MatthewsJames Wynn

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