TITLE

Characteristics of GaN-based photonic crystal surface emitting lasers

AUTHOR(S)
Tien-chang Lu; Shih-Wei Chen; Tsung-Ting Kao; Tzu-Wei Liu
PUB. DATE
September 2008
SOURCE
Applied Physics Letters;9/15/2008, Vol. 93 Issue 11, p111111
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Characteristics of GaN-based photonic crystal surface emitting lasers (PCSELs) were investigated and analyzed. The GaN-based PCSEL emits a blue wavelength at 401.8 nm with a linewidth of 1.6 Å and shows a threshold energy density about 2.7 mJ/cm2 under the optical pumping at room temperature. The lasing wavelength emitted from PCSELs with different lattice constants occurs at the calculated band edges showing different polarization angles due to the light diffracted in specific directions, corresponding exactly to Γ, K, and M directions in the K-space. Furthermore, the PCSEL also shows a spontaneous emission coupling efficiency β of about 5×10-3 and a characteristic temperature of 148 K.
ACCESSION #
34555689

 

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