GaN-based two-dimensional surface-emitting photonic crystal lasers with AlNGaN distributed Bragg reflector

Tien-chang Lu*, Shih Wei Chen, Li Fan Lin, Tsung Ting Kao, Chih Chiang Kao, Peichen Yu, Hao-Chung Kuo, Shing Chung Wang, Shanhui Fan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

GaN-based two-dimensional (2D) surface-emitting photonic crystal (PC) lasers with AlNGaN distributed Bragg reflectors are fabricated and demonstrated. The lasing threshold energy density is about 3.5 mJ cm2 per pulse under optical pumping at room temperature. Only one dominant emission wavelength of 424.3 nm with a narrow linewidth of 1.1 Å above the threshold is observed. The laser emission covers whole circularly 2D PC patterns (50 μm in diameter) with a small divergence angle. The lasing wavelength emitted from 2D PC lasers with different lattice constants occurs at the calculated band-edges provided by the PC patterns. The characteristics of large area, small divergence angle, and single mode emission from the GaN-based 2D surface-emitting PC lasers should be promising in high power blue-violet emitter applications.

Original languageEnglish
Article number011129
Number of pages3
JournalApplied Physics Letters
Volume92
Issue number1
DOIs
StatePublished - 7 Jan 2008

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