Lancaster EPrints

Low noise high responsivity InAs electron avalanche photodiodes for infrared sensing

Ker, Pin Jern and Marshall, Andrew R. J. and David, John P. R. and Tan, Chee Hing (2012) Low noise high responsivity InAs electron avalanche photodiodes for infrared sensing. Physica Status Solidi (C), 9 (2). pp. 310-313. ISSN 1610-1634

Full text not available from this repository.

Abstract

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

Item Type: Article
Journal or Publication Title: Physica Status Solidi (C)
Uncontrolled Keywords: avalanche photodiodes ; detectivity ; impact ionization ; InAs ; responsivity
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 54628
Deposited By: ep_importer_pure
Deposited On: 28 May 2012 11:21
Refereed?: Yes
Published?: Published
Last Modified: 24 Jan 2014 05:27
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/54628

Actions (login required)

View Item