Single mode stimulated emission from prismlike gallium nitride submicron cavities
Author(s) -
C.M. Lai,
HsiaoMei Wu,
PoJung Huang,
S.-L. Wang,
L.-H. Peng
Publication year - 2007
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.2720259
Subject(s) - laser linewidth , gallium nitride , materials science , blueshift , polarization (electrochemistry) , gallium , optics , wide bandgap semiconductor , optoelectronics , nitride , photoluminescence , chemistry , laser , physics , layer (electronics) , nanotechnology , metallurgy
The authors report single mode stimulated emission from optical pumping of prismlike gallium nitride (GaN) with a side length of 0.75μm. The cavities were formed by reaction-rate-limited photoetching that preserved the nonpolar {101¯0} or {112¯0} facets. They were characterized by an average quality factor above 103 and an equivalent facet reflectivity exceeding 98%, which allowed field amplification by repeated internal reflections in the transverse plane and field polarization along the c axis. Slight spectral blueshift (0.35nm) and narrowing in linewidth (∼0.4nm) were observed with increase of pump intensity. These observations manifested resonant coupling of the band edge emission to a single mode of the prismlike GaN cavity.
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