Quantum efficiency in GaAs Schottky photodetectors with enhancement due to surface plasmon excitations

A. Sellai, P. Dawson

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10 Citations (Scopus)


The overall quantum efficiency in surface plasmon (SP) enhanced Schottky barrier photodetectors is examined by considering both the external and internal yield. The external yield is considered through calculations of absorption and transmission of light in a configuration that allows reflectance minimization due to SP excitation. Following a Monte Carlo method, a procedure is presented to estimate the internal yield while taking into account the effect of elastic and inelastic scattering processes on excited carriers subsequent to photon absorption. The relative importance of internal photoemission and band-to-band contributions to the internal yield is highlighted along with the variation of the yield as a function of wavelength, metal thickness and other salient parameters of the detector.

Original languageEnglish
Pages (from-to)29-33
Number of pages5
JournalSolid State Electronics
Issue number1
Publication statusPublished - Jan 2002



  • Band-to-band efficiency
  • Internal photoemission
  • Quantum efficiency
  • Schottky photodetectors
  • Surface plasmons

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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