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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 37, Iss. 11 — Jun. 1, 2012
  • pp: 1886–1888

Microelectromechanical systems bimaterial terahertz sensor with integrated metamaterial absorber

Fabio Alves, Dragoslav Grbovic, Brian Kearney, and Gamani Karunasiri  »View Author Affiliations


Optics Letters, Vol. 37, Issue 11, pp. 1886-1888 (2012)
http://dx.doi.org/10.1364/OL.37.001886


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Abstract

This Letter describes the fabrication of a microelectromechanical systems (MEMS) bimaterial terahertz (THz) sensor operating at 3.8 THz. The incident THz radiation is absorbed by a metamaterial structure integrated with the bimaterial. The absorber was designed with a resonant frequency matching the quantum cascade laser illumination source while simultaneously providing structural support, desired thermomechanical properties and optical readout access. Measurement showed that the fabricated absorber has nearly 90% absorption at 3.8 THz. A responsivity of 0.1°/μW and a time constant of 14 ms were observed. The use of metamaterial absorbers allows for tuning the sensor response to the desired frequency to achieve high sensitivity for potential THz imaging applications.

© 2012 Optical Society of America

OCIS Codes
(040.2235) Detectors : Far infrared or terahertz
(160.3918) Materials : Metamaterials

ToC Category:
Detectors

History
Original Manuscript: January 26, 2012
Revised Manuscript: February 24, 2012
Manuscript Accepted: February 27, 2012
Published: May 21, 2012

Citation
Fabio Alves, Dragoslav Grbovic, Brian Kearney, and Gamani Karunasiri, "Microelectromechanical systems bimaterial terahertz sensor with integrated metamaterial absorber," Opt. Lett. 37, 1886-1888 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-11-1886

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