Low noise high responsivity InAs electron avalanche photodiodes for infrared sensing

  • Ker P
  • Marshall A
  • David J
 et al. 
  • 14


    Mendeley users who have this article in their library.
  • 14


    Citations of this article.


Dark current measurements on SU-8 passivated InAs avalanche photodiodes (APDs) were carried out at temperatures ranging from 77 to 290 K. Extraction of the bulk and surface components suggested that the InAs APDs exhibit diffusion dominated bulk current and generation-recombination surface current. The activation energies obtained were 0.36 eV and 0.18 eV for bulk and surface components respectively. The responsivities of the InAs APDs were measured for wavelengths between 1.3 to 2 mu m and the quantum efficiency was calculated to be similar to 50% across the measured wavelengths. The detectivity of the InAs diode was calculated based on the measured dark current density and responsivity. It was shown that the InAs APD has comparable detectivity with a commercial Judson InAs photodiode at temperatures of 200 to 290 K but has approximately 10 times higher detectivity than a commercial Hamamatsu InAs photodiode at 77 K. The potential of InAs APDs for infrared sensing is shown yielding high responsivity values and low dark current densities at 77 K. An avalanche multiplication factor of 22 with minimal excess noise factor at a dark current density of similar to 10(-4) A/cm(2), equivalent to a gain normalized dark current of similar to 5 x 10(-6) A/cm(2) is obtained. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Author-supplied keywords

  • Avalanche photodiodes
  • Detectivity
  • Impact ionization
  • InAs
  • Responsivity

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Pin Jern Ker

  • Andrew R.J. Marshall

  • John P.R. David

  • Chee Hing Tan

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free