Onset of surface stimulated emission at 260 nm from AlGaN multiple quantum wells

Xiaohang Li, Hongen Xie, Fernando Ponce, Jae Hyun Ryou, Theeradetch Detchprohm, Russell D. Dupuis

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We demonstrated onset of deep-ultraviolet (DUV) surface stimulated emission (SE) from c-plane AlGaN multiple-quantum well (MQW) heterostructures grown on a sapphire substrate by optical pumping at room temperature. The onset of SE became observable at a pumping power density of 630 kW/cm2. Spectral deconvolution revealed superposition of a linearly amplified spontaneous emission peak at λ ∼ 257.0 nm with a full width at half maximum (FWHM) of ∼12 nm and a superlinearly amplified SE peak at λ ∼ 260 nm with a narrow FWHM of less than 2 nm. In particular, the wavelength of ∼260 nm is the shortest wavelength of surface SE from III-nitride MQW heterostructures to date. Atomic force microscopy and scanning transmission electron microscopy measurements were employed to investigate the material and structural quality of the AlGaN heterostructures, showing smooth surface and sharp layer interfaces. This study offers promising results for AlGaN heterostructures grown on sapphire substrates for the development of DUV vertical cavity surface emitting lasers (VCSELs).

Original languageEnglish (US)
Article number241109
JournalApplied Physics Letters
Volume107
Issue number24
DOIs
StatePublished - Dec 14 2015

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stimulated emission
quantum wells
sapphire
optical pumping
surface emitting lasers
wavelengths
spontaneous emission
nitrides
radiant flux density
surface layers
pumping
atomic force microscopy
transmission electron microscopy
cavities
scanning electron microscopy
room temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Onset of surface stimulated emission at 260 nm from AlGaN multiple quantum wells. / Li, Xiaohang; Xie, Hongen; Ponce, Fernando; Ryou, Jae Hyun; Detchprohm, Theeradetch; Dupuis, Russell D.

In: Applied Physics Letters, Vol. 107, No. 24, 241109, 14.12.2015.

Research output: Contribution to journalArticle

Li, Xiaohang ; Xie, Hongen ; Ponce, Fernando ; Ryou, Jae Hyun ; Detchprohm, Theeradetch ; Dupuis, Russell D. / Onset of surface stimulated emission at 260 nm from AlGaN multiple quantum wells. In: Applied Physics Letters. 2015 ; Vol. 107, No. 24.
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AU - Dupuis, Russell D.

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