Antenna-coupled microcavities for enhanced infrared photo-detection

Journal Article · Mon Jan 20 04:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4862750· OSTI ID:22280597

Nga Chen, Yuk; Todorov, Yanko; Askenazi, Benjamin; Vasanelli, Angela; Sirtori, Carlo ^[1]; Biasiol, Giorgio ^[2]; Colombelli, Raffaele ^[3]

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1. Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot, Sorbonne Paris Cité, CNRS-UMR 7162, 75013 Paris (France)
2. IOM CNR, Laboratorio TASC, Area Science Park, I-34149 Trieste (Italy)
3. Institut d'Electronique Fondamentale, Université Paris Sud, CNRS-UMR 8622, F-91405 Orsay (France)

We demonstrate mid-infrared detectors embedded into an array of double-metal nano-antennas. The antennas act as microcavities that squeeze the electric field into thin semiconductor layers, thus enhancing the detector responsivity. Furthermore, thanks to the ability of the antennas to gather photons from an area larger than the device's physical dimensions, the dark current is reduced without hindering the photo-generation rate. In these devices, the background-limited performance is improved with a consequent increase of the operating temperature. Our results illustrate how the antenna-coupled microcavity concept can be applied to enhance the performances of infrared opto-electronic devices.

• OSTI ID: 22280597
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 3 Vol. 104; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTENNAS
ELECTRIC CURRENTS
ELECTRIC FIELDS
ELECTRONIC EQUIPMENT
INFRARED RADIATION
LAYERS
METALS
PERFORMANCE
PHOTODETECTORS
PHOTONS
SEMICONDUCTOR MATERIALS
TEMPERATURE DEPENDENCE