Lasing properties of non-polar GaN quantum dots in cubic aluminum nitride microdisk cavities

Lasing properties of non-polar GaN quantum dots in cubic aluminum nitride microdisk cavities

We demonstrate laser emission from optically pumped non-polar cubic GaN quantum dots embedded in cubic aluminum nitride microdisks. Power dependent micro-photoluminescence studies at low temperature (∼10 K) revealed S-shaped curves of the integral mode intensity. We observed whispering gallery modes...

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Veröffentlicht in:Applied physics letters 2013-07, Vol.103 (2)
Hauptverfasser: Bürger, M., Callsen, G., Kure, T., Hoffmann, A., Pawlis, A., Reuter, D., As, D. J.
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container_title Applied physics letters
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creator Bürger, M.
Callsen, G.
Kure, T.
Hoffmann, A.
Pawlis, A.
Reuter, D.
As, D. J.
description We demonstrate laser emission from optically pumped non-polar cubic GaN quantum dots embedded in cubic aluminum nitride microdisks. Power dependent micro-photoluminescence studies at low temperature (∼10 K) revealed S-shaped curves of the integral mode intensity. We observed whispering gallery modes with quality factors up to 5000 at the high energy side (4 eV, i.e., ∼310 nm wavelength) in photoluminescence spectra of microdisks with a diameter of 2.5 μm. Furthermore, we have determined the spontaneous emission coupling factors to β = 0.12 and β = 0.42 for resonator modes of different radial orders.
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title Lasing properties of non-polar GaN quantum dots in cubic aluminum nitride microdisk cavities
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