Open AccessEnhanced electromagnetic coupling between terahertz radiation and plasmons in a grating-gate transistor structure on membrane substrate
Author(s) -
V. V. Popov,
D. V. Fateev,
O. V. Polischuk,
Michael Shur
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.016771
Subject(s) - terahertz radiation , plasmon , grating , optoelectronics , optics , materials science , responsivity , surface plasmon , detector , substrate (aquarium) , coupling (piping) , electromagnetic radiation , physics , photodetector , oceanography , metallurgy , geology
We have shown that the electromagnetic coupling of a grating-gate plasmonic detector to terahertz radiation can be considerably enhanced by placing the detector onto a membrane substrate and using a narrow-slit grating-gate. The responsivity of the membrane detector can be enhanced by a factor of 50 as compared to a conventional grating-gate plasmonic detector on a bulk substrate due to enhanced electromagnetic coupling between the plasmons and terahertz radiation.