Share Email Print
cover

Proceedings Paper

Room-temperature nanowire terahertz photodetectors
Author(s): Lorenzo Romeo; Dominique Coquillant; Leonardo Viti; Daniele Ercolani; Lucia Sorba; Wojciech Knap ; Alessandro Tredicucci; Miriam Serena Vitiello
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Semiconductor nanowires (NWs) represent an ideal building block for implementing rectifying diodes or plasma­ wave detectors that could operate well into the THz, thanks to the typical attofarad-order capacitance. Despite the strong effort in developing these nanostructures for a new generation of complementary metal-oxide semi­ conductors (CMOS), memory and photonic devices, their potential as radiation sensors into the Terahertz is just starting to be explored. We report on the development of NW-based field effect transistors operating as high sensitivity THz detectors in the 0.3 - 2.8 THz range. By feeding the radiation field of either an electronic THz source or a quantum cascade laser (QCL) at the gate-source electrodes by means of a wide band dipole antenna, we measured a photovoltage signal corresponding to responsivity values up to 100 V IW, with impressive noise equivalent power levels < 6 x 10-11W/Hz at room temperature and a > 300kHz modulation bandwidth. The potential scalability to even higher frequencies and the technological feasibility of realizing multi-pixel arrays coupled with QCL sources make the proposed technology highly competitive for a future generation of THz detection systems.

Paper Details

Date Published: 4 February 2013
PDF: 9 pages
Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86312E (4 February 2013); doi: 10.1117/12.2004193
Show Author Affiliations
Lorenzo Romeo, NEST, Istituto Nanoscienze (Italy)
Dominique Coquillant, Lab. Charles Coulomb, CNRS-Univ. Montpellier 2 (France)
Leonardo Viti, NEST, Istituto Nanoscienze (Italy)
Daniele Ercolani, NEST, Istituto Nanoscienze (Italy)
Lucia Sorba, NEST, Istituto Nanoscienze (Italy)
Wojciech Knap , Lab. Charles Coulomb, CNRS-Univ. Montpellier 2 (France)
Alessandro Tredicucci, NEST, Istituto Nanoscienze (Italy)
Miriam Serena Vitiello, NEST, Istituto Nanoscienze (Italy)


Published in SPIE Proceedings Vol. 8631:
Quantum Sensing and Nanophotonic Devices X
Manijeh Razeghi, Editor(s)

© SPIE. Terms of Use
Back to Top