Schottky MSM photodetectors on GaN films grown on sapphire by lateral epitaxial overgrowth

Patrick Kung*, Danielle Walker, Peter Sandvik, Melissa Hamilton, Jacqueline Diaz, In Hwan Lee, Manijeh Razeghi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We report the growth and character on of Schottky based metal-semiconductor-metal ultraviolet photodetectors fabricated on lateral epitaxially overgrown GaN films. The lateral epitaxial overgrowth of GaN was carried out on basal plane sapphire substrates by low pressure metalorganic chemical vapor deposition and exhibited lateral growth rates more than 5 times as high as vertical growth rates. The spectral responsivity, the dependence on bias voltage, on incident optical power, and the time response of these photodetectors have been characterized. Two detector orientations were investigated: one with the interdigitated finger pattern parallel and the other perpendicular to the underlying SiOx mask stripes.

Original languageEnglish (US)
Pages (from-to)223-229
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jan 1 1999

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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