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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 35 — Dec. 10, 2010
  • pp: 6726–6736

Enhancing the spectral response of filled bolometer arrays for submillimeter astronomy

Vincent Revéret, Louis Rodriguez, and Patrick Agnèse  »View Author Affiliations


Applied Optics, Vol. 49, Issue 35, pp. 6726-6736 (2010)
http://dx.doi.org/10.1364/AO.49.006726


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Abstract

Future missions for astrophysical studies in the submillimeter region will need detectors with very high sensitivity and large fields of view. Bolometer arrays can fulfill these requirements over a very broad band. We describe a technique that enables bolometer arrays that use quarter-wave cavities to have a high spectral response over most of the submillimeter band. This technique is based on the addition on the front of the array of an antireflecting dielectric layer. The optimum parameters (layer thickness and distance to the array) are determined by a 2D analytic code. This general principle is applied to the case of Herschel PACS bolometers (optimized for the 60 to 210 μm band). As an example, we demonstrate experimentally that a PACS array covered by a 138 μm thick silicon layer can improve the spectral response by a factor of 1.7 in the 450 μm band.

© 2010 Optical Society of America

OCIS Codes
(040.0040) Detectors : Detectors
(040.1240) Detectors : Arrays
(350.1270) Other areas of optics : Astronomy and astrophysics
(040.2235) Detectors : Far infrared or terahertz

ToC Category:
Detectors

History
Original Manuscript: September 7, 2010
Revised Manuscript: October 22, 2010
Manuscript Accepted: October 22, 2010
Published: December 3, 2010

Citation
Vincent Revéret, Louis Rodriguez, and Patrick Agnèse, "Enhancing the spectral response of filled bolometer arrays for submillimeter astronomy," Appl. Opt. 49, 6726-6736 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-35-6726


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