Sub-250 nm room-temperature optical gain from AlGaN/AlN multiple quantum wells with strong band-structure potential fluctuations

Emanuele Francesco Pecora, Wei Zhang, A. Yu. Nikiforov, Lin Zhou, David Smith, Jian Yin, Roberto Paiella, Luca Dal Negro, T. D. Moustakas

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Deep-UV optical gain has been demonstrated in Al 0.7Ga 0.3N/AlN multiple quantum wells under femtosecond optical pumping. Samples were grown by molecular beam epitaxy under a growth mode that introduces band structure potential fluctuations and high-density nanocluster-like features within the AlGaN wells. A maximum net modal gain value of 118 ± 9 cm -1 has been measured and the transparency threshold of 5 ± 1 μJ/cm 2 was experimentally determined, corresponding to 1.4 × 10 17cm -3 excited carriers. These findings pave the way for the demonstration of solid-state lasers with sub-250 nm emission at room temperature.

Original languageEnglish (US)
Article number061111
JournalApplied Physics Letters
Volume100
Issue number6
DOIs
StatePublished - Feb 6 2012

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quantum wells
optical pumping
room temperature
solid state lasers
nanoclusters
molecular beam epitaxy
thresholds

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Sub-250 nm room-temperature optical gain from AlGaN/AlN multiple quantum wells with strong band-structure potential fluctuations. / Francesco Pecora, Emanuele; Zhang, Wei; Yu. Nikiforov, A.; Zhou, Lin; Smith, David; Yin, Jian; Paiella, Roberto; Dal Negro, Luca; Moustakas, T. D.

In: Applied Physics Letters, Vol. 100, No. 6, 061111, 06.02.2012.

Research output: Contribution to journalArticle

Francesco Pecora, E, Zhang, W, Yu. Nikiforov, A, Zhou, L, Smith, D, Yin, J, Paiella, R, Dal Negro, L & Moustakas, TD 2012, 'Sub-250 nm room-temperature optical gain from AlGaN/AlN multiple quantum wells with strong band-structure potential fluctuations', Applied Physics Letters, vol. 100, no. 6, 061111. https://doi.org/10.1063/1.3681944
Francesco Pecora, Emanuele ; Zhang, Wei ; Yu. Nikiforov, A. ; Zhou, Lin ; Smith, David ; Yin, Jian ; Paiella, Roberto ; Dal Negro, Luca ; Moustakas, T. D. / Sub-250 nm room-temperature optical gain from AlGaN/AlN multiple quantum wells with strong band-structure potential fluctuations. In: Applied Physics Letters. 2012 ; Vol. 100, No. 6.
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AU - Smith, David

AU - Yin, Jian

AU - Paiella, Roberto

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