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Proceedings Paper

A metamaterial-coupled hot-electron-bolometer working at THz frequencies
Author(s): S. Cibella; P. Carelli; M. G. Castellano; F. Chiarello; A. Gaggero; E. Giovine; G. Scalari; G. Torrioli; R. Leoni
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Paper Abstract

We will report our recent results using ultrathin NbN films (4-5 nm) for developing both conventional antenna-coupled hot-electron-bolometers (AC-HEBs) and of a novel type of phonon cooled HEB electrically-coupled to a metamaterial acting as a resonant absorber at THz frequencies (MM-HEB), optically-coupled through arrays of split ring resonators (metadevices). In a phonon-cooled HEB, being the active layer an ultrathin film of superconducting NbN, we have an ultrafast thermal direct detector that is also frequency selective thanks to the integration with the resonant metamaterial. We characterized both the AC-HEB and the MM-HEB by electro optical measurements using as a sources both the black body emission and terahertz quantum cascade lasers (THz-QCLs) and we compared their performances.

Paper Details

Date Published: 24 February 2017
PDF: 6 pages
Proc. SPIE 10103, Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications X, 101031M (24 February 2017); doi: 10.1117/12.2252165
Show Author Affiliations
S. Cibella, CNR-Istituto di Fotonica e Nanotecnologie (Italy)
P. Carelli, Univ. Degli Studi Dell Aquila (Italy)
M. G. Castellano, CNR-Istituto di Fotonica e Nanotecnologie (Italy)
F. Chiarello, CNR-Istituto di Fotonica e Nanotecnologie (Italy)
A. Gaggero, CNR-Istituto di Fotonica e Nanotecnologie (Italy)
E. Giovine, CNR-Istituto di Fotonica e Nanotecnologie (Italy)
G. Scalari, ETH Zürich (Switzerland)
G. Torrioli, CNR-Istituto di Fotonica e Nanotecnologie (Italy)
R. Leoni, CNR-Istituto di Fotonica e Nanotecnologie (Italy)


Published in SPIE Proceedings Vol. 10103:
Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications X
Laurence P. Sadwick; Tianxin Yang, Editor(s)

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