@article{10902/30687,
year = {2012},
url = {https://hdl.handle.net/10902/30687},
abstract = {Plasmonic bowtie antennas made of doped silicon can operate as plasmonic resonators at terahertz (THz) frequencies and provide large field enhancement close to their gap. We demonstrate both experimentally and theoretically that the field confinement close to the surface of the antenna enables the detection of ultrathin (100 nm) inorganic films, about 3750 times thinner than the free space wavelength. Based on model calculations, we conclude that the detection sensitivity and its variation with the thickness of the deposited layer are related to both the decay of the local THz field profile around the antenna and the local field enhancement in the gap of the bowtie antenna. This large field enhancement has the potential to improve the detection limits of plasmon-based biological and chemical sensors.},
organization = {This work was supported by the European Community's 7th Framework Programme under grant agreement no FP7-224189 (ULTRA project, http://www2.teknik.uu.se/Ultratc) and is part of the research program of the “Stichting voor Fundamenteel Onderzoek der Materie (FOM)”, which is financially supported by the “Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)”. This work was also supported by the European FP7 project “Nanoantenna” (FP7-HEALTH-F5-2009-241818-NANOANTENNA).},
publisher = {Optica Publishing Group},
publisher = {Optics Express, 2012, 20(5), 5052-5060},
title = {Detection of deep-subwavelength dielectric layers at terahertz frequencies using semiconductor plasmonic resonators},
author = {Berrier, Audrey and Albella Echave, Pablo and Poyli, M. Ameen and Ulbricht, Ronald and Bonn, Mischa and Aizpurua, Javier and Gómez Rivas, Jaime},
}