24 January 2011 Monolithic focal plane arrays for terahertz active spectroscopic imaging: an experimental study
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Proceedings Volume 7945, Quantum Sensing and Nanophotonic Devices VIII; 79450U (2011); doi: 10.1117/12.869468
Event: SPIE OPTO, 2011, San Francisco, California, United States
Abstract
Imaging arrays of direct detectors in the 0.5-5 THz range are being experimentally developed. Terahertz active imaging with amplitude-modulated quantum cascade lasers emitting at 2.5 and 4.4 THz performed by using an antenna-coupled superconducting microbolometer. We then present two room-temperature terahertz detector technologies compatible with monolithic arrays: i) GaAs Schottky diodes with air-bridge sub-micron anodes; ii) high electron mobility transistors with sub-micron Schottky gate. Performances, requirements and fabrication costs of the different detector technologies are compared.
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Michele Ortolani, Roberto Casini, Fabio Chiarello, Sara Cibella, Alessandra Di Gaspare, Florestano Evangelisti, Vittorio Foglietti, Ennio Giovine, Roberto Leoni, Guido Torrioli, Alessandro Tredicucci, Miriam S. Vitiello, Gaetano Scamarcio, "Monolithic focal plane arrays for terahertz active spectroscopic imaging: an experimental study", Proc. SPIE 7945, Quantum Sensing and Nanophotonic Devices VIII, 79450U (24 January 2011); doi: 10.1117/12.869468; https://doi.org/10.1117/12.869468
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KEYWORDS
Terahertz radiation

Diodes

Sensors

Quantum cascade lasers

Antennas

Gallium arsenide

Resistance

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