TITLE

Single mode high-contrast subwavelength grating vertical cavity surface emitting lasers

AUTHOR(S)
Huang, Michael C. Y.; Ye Zhou; Chang-Hasnain, Connie J.
PUB. DATE
April 2008
SOURCE
Applied Physics Letters;4/28/2008, Vol. 92 Issue 17, p171108
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present a single mode vertical-cavity surface-emitting laser (VCSEL) utilizing a single-layer, high-contrast subwavelength grating (HCG) based top mirror, which provides both the ultrahigh reflectivity and lateral transverse modes control. Experimentally, we demonstrate that merely 11 HCG stripes with a thickness of 230 nm are required to achieve lasing operation. The finite area of HCG, in combination with an oxide aperture of 2–6 μm, effectively discriminates the higher-order transverse modes in VCSELs with a side mode suppression ratio of >=40 dB. Furthermore, a single (first high-order transverse) mode, high output power of 2.3 mW laser was achieved from a VCSEL with a 10 μm oxide aperture.
ACCESSION #
32013171

 

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