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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Jospeh N. Mait
  • Vol. 48, Iss. 3 — Jan. 20, 2009
  • pp: 653–657

Multilayer structure for a spectral imaging sensor

Pascale Parrein, Norbert Moussy, Ludovic Poupinet, and Pierre Gidon  »View Author Affiliations


Applied Optics, Vol. 48, Issue 3, pp. 653-657 (2009)
http://dx.doi.org/10.1364/AO.48.000653


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Abstract

We investigate the possibility of recovering spectral information using a multilayer structure realized through microelectronics technologies and compatible with a matrix arrangement. The structure is made of photoabsorbing layers, acting as local photodetectors, alternating with transparent layers. The whole structure lies on a reflective surface. A stationary wave containing the spectral information of the source is generated within the structure. We determine the intensity of the stationary wave at any position, taking into account absorption and multireflections at each transition as well as the signal detected by the photoabsorbing layers. The model forecasting the detected signal is then validated using p-i-n diodes of different thicknesses made of hydrogenated amorphous silicon (a-Si:H) encompassed between indium tin oxide (ITO) electrodes. The detected signal depends on the wavelength of the incident light, the thickness of the detecting layer, and the latter’s position within the structure. A specific spectral response can then be associated to each photoabsorbing layer. We show how spectral information can be retrieved from this kind of structure in the visible spectrum range.

© 2009 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(160.1890) Materials : Detector materials
(230.4170) Optical devices : Multilayers
(300.6550) Spectroscopy : Spectroscopy, visible
(250.0040) Optoelectronics : Detectors

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: August 1, 2008
Manuscript Accepted: September 11, 2008
Published: January 16, 2009

Citation
Pascale Parrein, Norbert Moussy, Ludovic Poupinet, and Pierre Gidon, "Multilayer structure for a spectral imaging sensor," Appl. Opt. 48, 653-657 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-3-653

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