Narrow-band photodetection based on M-plane GaN films

Ghosh, Sandip and Rivera de Lucas, Carlos and Pau, J.L. and Muñoz Merino, Elias and Brandt, Oliver and Grahn, H.T. (2008). Narrow-band photodetection based on M-plane GaN films. "Physica Status Solidi A - Applications and Materials Science", v. 205 (n. 5); pp. 1100-1102. ISSN 0031-8965. https://doi.org/10.1002/pssa.200778650.

Description

Title: Narrow-band photodetection based on M-plane GaN films
Author/s:
  • Ghosh, Sandip
  • Rivera de Lucas, Carlos
  • Pau, J.L.
  • Muñoz Merino, Elias
  • Brandt, Oliver
  • Grahn, H.T.
Item Type: Article
Título de Revista/Publicación: Physica Status Solidi A - Applications and Materials Science
Date: May 2008
Volume: 205
Subjects:
Freetext Keywords: narrow-band spectral, ultraviolet photodetection, polarizationsensitive ,Schottky
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Ingeniería Electrónica
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Rapid identification of a range of hazardous airborne biological and chemical agents requires simultaneous detection at several specific wavelengths, and consequently a set of photodetectors with very narrow-band spectral responsivity. We demonstrate two ultraviolet photodetection configurations based on strained M-plane GaN films on LiAlO2(100) substrates grown by molecular-beam epitaxy with a detection bandwidth below 8 nm. The optical band gap of the film depends on the orientation of the linear polarization of the incident light relative to the c-axis of GaN, which lies in the film plane. The first configuration consists of a polarizationsensitive planar Schottky photodetector and a filter. An orthogonal alignment of the c-axis of the photodetector and the filter produces a detection system with a peak responsivity at 360 nm and a bandwidth of 6 nm. The second one consists of two planar Schottky photodetectors with their c-axes oriented perpendicular to each other. The difference signal between the two photodetectors produces a peak responsivity at 358 nm and a bandwidth of 7.3 nm.

More information

Item ID: 2605
DC Identifier: http://oa.upm.es/2605/
OAI Identifier: oai:oa.upm.es:2605
DOI: 10.1002/pssa.200778650
Official URL: http://www3.interscience.wiley.com/journal/119139909/issue
Deposited by: Memoria Investigacion
Deposited on: 15 Apr 2010 08:19
Last Modified: 20 Apr 2016 12:15
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