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Optics Letters

Optics Letters


  • Editor: Anthony J. Campillo
  • Vol. 31, Iss. 13 — Jul. 1, 2006
  • pp: 1945–1947

Coupled absorption filters for thermal detectors

Yuyan Wang, Benjamin J. Potter, and Joseph J. Talghader  »View Author Affiliations

Optics Letters, Vol. 31, Issue 13, pp. 1945-1947 (2006)

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A resonant absorption cavity that couples long-wavelength infrared (LWIR) light into a movable plate has been demonstrated for thermal detectors, especially microbolometers. Each device is continuously tunable over 8.7 11.1 μ m by using electrostatic actuation with voltages from 0 to 42 V . The width of the resonance is relatively broad, approximately 1.5 μ m , to match the large widths of many spectral features in the LWIR. At an actuation voltage of 45 V , the device switches into a broadband mode with an absorption width of 2.83 μ m . This latter mode is used to enhance sensitivity in low-light situations in which little spectral information is present.

© 2006 Optical Society of America

OCIS Codes
(040.3060) Detectors : Infrared
(350.2450) Other areas of optics : Filters, absorption

ToC Category:

Original Manuscript: February 16, 2006
Revised Manuscript: April 4, 2006
Manuscript Accepted: April 5, 2006

Yuyan Wang, Benjamin J. Potter, and Joseph J. Talghader, "Coupled absorption filters for thermal detectors," Opt. Lett. 31, 1945-1947 (2006)

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