Kappeler, Roman; Erni, Daniel; Cui, Xudong; Novotny, L.:
Field computations of optical antennas
2007
In: Journal of Computational and Theoretical Nanoscience, Jg. 4 (2007), Heft 3, S. 686 - 691
Artikel/Aufsatz in Zeitschrift / Fach: Elektrotechnik
Titel:
Field computations of optical antennas
Autor(in):
Kappeler, Roman; Erni, Daniel im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Cui, Xudong im Online-Personal- und -Vorlesungsverzeichnis LSF anzeigen; Novotny, L.
Erscheinungsjahr
2007
Erschienen in:
Journal of Computational and Theoretical Nanoscience, Jg. 4 (2007), Heft 3, S. 686 - 691
ISSN
WWW URL

Abstract:

Antenna-based near-field optical microscopy and spectroscopy makes use of locally enhanced optical fields created near laser-irradiated metal nanostructures acting as local probes. Using threedimensional simulations based on the finite element method we study the electromagnetic fields near various optical antennas and we optimize their geometry in order to bring out a strong enhancement in a selected frequency range. Our results provide clear guidelines for the fabrication of effi- cient antenna structures and for improving the sensitivity of current near-field microscopy schemes.