Ultraviolet GaN-based microdisk laser with AlN/AlGaN distributed Bragg reflector

Cheng Chang Chen*, M. H. Shih, Yi Chun Yang, Hao-Chung Kuo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


We demonstrated a 4.7 μm GaN-based microdisk laser with 25-pair AlN/AlGaN distributed Bragg reflector in ultraviolet range without undercut or deeply-etching procedures. The distributed Bragg reflector provides a high reflectivity of 85%, and selects lasing mode around 375 nm wavelength. Under optical pumping conditions, the lasing action was observed with a low threshold power density of 0.03 kW/ cm2. We also characterized the whispering gallery mode profiles of the microdisk with finite-different time-domain simulation.

Original languageEnglish
Article number151115
JournalApplied Physics Letters
Issue number15
StatePublished - 12 Apr 2010

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