Journal
NANOPHOTONICS
Volume 11, Issue 18, Pages 4197-4208Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/nanoph-2022-0278
Keywords
optical gap antennas; optical rectification; photo-assisted transport; rectennas; thermo-current; thermo-voltage
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Funding
- European Research Council under the European Community's Seventh Framework Program FP7/2007-2013 Grant [306772]
- EIPHI Graduate School [ANR-17-EURE-0002]
- French Agence Nationale de la Recherche under program Investment for the Future [ANR-21-ESRE-0040]
- Region de Bourgogne FrancheComte
- CNRS
- French Renatech + network
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This paper introduces the working principle of electrically-contacted optical gap antennas and the thermal effects caused by metal light absorption. It discriminates the contribution of laser-induced thermo-electric effects in photo-assisted electronic transport through analysis.
Electrically-contacted optical gap antennas are nanoscale interface devices enabling the transduction between photons and electrons. This new generation of device, usually constituted of metal elements (e.g. gold), captures visible to near infrared electromagnetic radiation and rectifies the incident energy in a direct-current (DC) electrical signal. However, light absorption by the metal may lead to additional thermal effects which need to be taken into account to understand the complete photo-response of the devices. The purpose of this communication is to discriminate the contribution of laser-induced thermo-electric effects in the photo-assisted electronic transport. We show case our analysis with the help of electromigrated devices.
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