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Infrared pixel based on Seebeck nanoantennas

Published online by Cambridge University Press:  23 December 2019

Francisco Javier González Open the ORCID record for Francisco Javier González [Opens in a new window] ,
Nagendra Dhakal ,
Tommy Boykin II ,
Javier Méndez-Lozoya  and
Robert E. Peale
Francisco Javier González*
Affiliation:
Physics, University of Central Florida, Orlando FL 32789 USA Truventic LLC, 1209 W. Gore St. Orlando FL 32805 USA LANCYTT/UASLP, Sierra Leona 550, Lomas 2a Sección, SLP, 78210, Mexico
Nagendra Dhakal
Affiliation:
Physics, University of Central Florida, Orlando FL 32789 USA
Tommy Boykin II
Affiliation:
Physics, University of Central Florida, Orlando FL 32789 USA
Javier Méndez-Lozoya
Affiliation:
LANCYTT/UASLP, Sierra Leona 550, Lomas 2a Sección, SLP, 78210, Mexico
Robert E. Peale
Affiliation:
Physics, University of Central Florida, Orlando FL 32789 USA Truventic LLC, 1209 W. Gore St. Orlando FL 32805 USA
*
*(Email: [email protected])
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Abstract

Bolometric arrays dominate in commercial terahertz and millimeter wave imagers. Bolometers tend to be slow and require an operating bias that increases the power budget. This paper presents first results on antenna-coupled thermo-electric junction detectors, a potentially attractive alternative to microbolometers. The nanoscale junctions have small thermal mass and can be much faster than bolometers. These junctions are heated by currents excited in spectrally-selective antennas and generate a voltage based on the Seebeck effect without any externally applied power. A pixel comprising a series array of antenna coupled junctions with peak response at 7.5 THz (40 μm wavelength) is designed and experimentally demonstrated. Responsivity of 5 MV/W, 500 Hz chopping frequency, and D* of 3.5 x 1010 Jones are demonstrated.

Keywords

thermoelectricitynanostructureoptoelectronicthermoelectric
Type
Articles
Information
MRS Advances , Volume 5 , Issue 35-36: Electronic, Photonic and Magnetic Materials , 2020 , pp. 1837 - 1842
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Copyright
Copyright © Materials Research Society 2019

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