Title: Enhanced Stimulated Emission from Optically Pumped Gallium Nitride Nanopillars
Authors: Lo, Ming-Hua
Cheng, Yuh-Jen
Kuo, Hao-Chung
Wang, Shing-Chung
光電工程學系
Department of Photonics
Issue Date: 1-Feb-2011
Abstract: We report the observation of an enhanced stimulated emission from optically pumped GaN nanopillars. The nanopillars were fabricated from an epitaxial wafer by patterned etching followed by crystalline regrowth. When the sample was optically excited, a strong stimulated emission peak emerged from a broad spontaneous emission background. The emission was attributed to electron-hole plasma gain at high carrier density. The emission slope efficiency was greatly enhanced by 20 times compared with a GaN substrate under the same pumping configuration. We remark that the enhancement is due to better gain and photon interaction from the multiple scattering of photons among nanopillars. (C) 2011 The Japan Society of Applied Physics
URI: http://dx.doi.org/10.1143/APEX.4.022102
http://hdl.handle.net/11536/25778
ISSN: 1882-0778
DOI: 10.1143/APEX.4.022102
Journal: APPLIED PHYSICS EXPRESS
Volume: 4
Issue: 2
End Page: 
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