An optically pumped GaN-AlGaN vertical cavity surface emitting laser

Joan M. Redwing, David A.S. Loeber, Neal G. Anderson, Michael A. Tischler, Jeffrey S. Flynn

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Abstract

An optically pumped GaN-based vertical cavity surface emitting laser (VCSEL) is demonstrated. Laser emission near 363 nm is observed at room temperature from the surface of a VCSEL structure optically pumped along a cleaved sample edge by focused light from a nitrogen laser. The VCSEL structure, which was grown on a sapphire substrate by metalorganic vapor phase epitaxy, consists of a 10 μm GaN active region sandwiched between 30-period Al0.40Ga0.60N-Al0.12Ga0.88N Bragg reflectors. At optical pump intensities above ∼2.0 MW/cm2, a narrow (<5 Å) laser mode at 363.5 nm emerges from the GaN photoluminescence spectrum. This mode becomes the dominant feature of the spectrum at higher pump powers, and additional modes appear ∼1.3 nm above and below this mode at 362.1 nm and 364.8 nm. The ∼1.3 nm mode spacing corresponds closely with the 1.1 nm spacing predicted from an electromagnetics model of the VCSEL structure.

Original languageEnglish (US)
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume69
Issue number1
DOIs
StatePublished - Jul 1 1996

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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