Published January 1, 2012 | Version v1
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Integrated AlGaN quadruple-band ultraviolet photodetectors

  • 1. Bilkent Univ, Nanotechnol Res Ctr, TR-06800 Ankara, Turkey
  • 2. Inst Elect Mat Technol, PL-01919 Warsaw, Poland

Description

Monolithically integrated quadruple back-illuminated ultraviolet metal-semiconductor-metal photodetectors with four different spectral responsivity bands were demonstrated on each of two different AlxGa1-xN heterostructures. The average of the full-width at half-maximum (FWHM) of the quantum efficiency peaks was 18.15 nm for sample A, which incorporated five 1000 nm thick epitaxial layers. In comparison, the average FWHM for sample B was 9.98 nm, which incorporated nine 500 nm thick epitaxial layers.

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