Metal-organic hybrid metamaterial THz imaging band translators
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Authors
Grbovic, Dragoslav
Alves, Fabio
Karunasiri, Gamani
Newman, Jim
Subjects
metamaterial absorber
SU8
Terahertz sensor
SU8
Terahertz sensor
Advisors
Date of Issue
2015
Date
Publisher
SPIE
Language
Abstract
We investigate the feasibility of negative photoresist as a structural material in metal-organic hybrid THz imaging detectors using SU-8. We will discuss design of metamaterials for MEMS-based terahertz (THz) thermal sensors and design and microfabrication process for building SU8-based MEMS THz focal plane arrays. Metamaterials of this kind, exhibiting absorption properties comparable to those of resonant metamaterials made using traditional thin films, coupled with the applicability of SU-8 as a structural material, offer possibilities for quick, simple microfabrication of focal plane arrays of THz imaging detectors. SU-8 is a low-cost material that can quickly be spun onto a substrate at a wide range of thicknesses and photolithographically patterned into a variety of structures. This removes the need for both PECVD deposition and plasma etching, dramatically increasing the speed and lowering the cost of production of such FPAs. We further investigate feasibility of use of such detectors as band translators rather than traditional bimaterial devices. Translators would be optically probed with an infrared (IR) camera. Individual pixels would absorb THz radiation, heat up and the thermal image would be projected onto an infrared camera, effectively translating the image from THz into IR.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1117/12.2185116
Series/Report No
Department
Physics
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
DoD
Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
Funder
Format
9 p.
Citation
Grbovic, Dragoslav, et al. "Metal-organic hybrid metamaterial THz imaging band translators." Automatic Target Recognition XXV. Vol. 9476. International Society for Optics and Photonics, 2015.
Distribution Statement
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.