Deep-ultraviolet lasing at 243 nm from photo-pumped AlGaN/AlN heterostructure on AlN substrate

Zachary Lochner, Tsung Ting Kao, Yuh Shiuan Liu, Xiaohang Li, Md Mahbub Satter, Shyh Chiang Shen, P. Douglas Yoder, Jae Hyun Ryou, Russell D. Dupuis*, Yong Wei, Hongen Xie, Alec Fischer, Fernando A. Ponce

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

81 Scopus citations


Deep-ultraviolet lasing was achieved at 243.5 nm from an Al x Ga 1-x N-based multi-quantum-well structure using a pulsed excimer laser for optical pumping. The threshold pump power density at room-temperature was 427 kW/cm 2 with transverse electric (TE)-polarization-dominant emission. The structure was epitaxially grown by metalorganic chemical vapor deposition on an Al-polar free-standing AlN (0001) substrate. Stimulated emission is achieved by design of the active region, optimizing the growth, and the reduction in defect density afforded by homoepitaxial growth of AlN buffer layers on AlN substrates, demonstrating the feasibility of deep-ultraviolet diode lasers on free-standing AlN.

Original languageEnglish (US)
Article number101110
JournalApplied Physics Letters
Issue number10
StatePublished - Mar 11 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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