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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 30, Iss. 8 — Aug. 1, 2013
  • pp: 1703–1713

Optical modeling techniques for multimode horn-coupled power detectors for submillimeter and far-infrared astronomy

Christopher N. Thomas and Stafford Withington  »View Author Affiliations


JOSA A, Vol. 30, Issue 8, pp. 1703-1713 (2013)
http://dx.doi.org/10.1364/JOSAA.30.001703


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Abstract

An important class of detectors for the submillimeter and far-infrared uses a multimode horn to couple incident radiation into an absorbing film made from a thin conductor. We consider how to model the full, partially coherent, optical behavior of these multimode detectors using extensions of mode-matching techniques. We validate modeling the absorber as a resistive sheet, and demonstrate the equivalence of mode-matching and Green’s function methods for calculating the scattering matrix representation of the film. Finally, we show how the scattering matrix of the film can be cascaded with those of the other components, as determined by mode matching, so as to calculate the overall optical response of the detector. Simulations are presented of the optical behavior of a square absorbing film in a circular waveguide.

© 2013 Optical Society of America

OCIS Codes
(030.4070) Coherence and statistical optics : Modes
(110.4980) Imaging systems : Partial coherence in imaging
(110.6770) Imaging systems : Telescopes
(040.2235) Detectors : Far infrared or terahertz

ToC Category:
Detectors

History
Original Manuscript: April 26, 2013
Revised Manuscript: July 8, 2013
Manuscript Accepted: July 8, 2013
Published: July 31, 2013

Citation
Christopher N. Thomas and Stafford Withington, "Optical modeling techniques for multimode horn-coupled power detectors for submillimeter and far-infrared astronomy," J. Opt. Soc. Am. A 30, 1703-1713 (2013)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-30-8-1703

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