Title: Electric field enhancement of gold tip optical antenna
Authors: Mehdi Zohrabi; M.Kh. Salakhov; S.S. Kharintsev
Addresses: Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kazan, Russia ' Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kazan, Russia ' Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kazan, Russia
Abstract: This paper shows design of gold tip optical antenna based on the specific geometry. The enhancement changes of the electric field of plane wave laser excitation from 400 to 700 nm surrounding the optical antenna are simulated. Based on direct illumination of antenna apex in TENOM back ground signal is produced and cause efficiency of optical microscopy. In practice, one can change of antenna design and decrease this background signal. Developments of geometry incorporating the period change of circular grating in period 200 nm on the shaft of antenna. In addition, the distribution of enhancement of the electric field in a plane perpendicular to the shaft has been acquired.
Keywords: optical antennas; tapered gold tips; electrical field enhancement; surface plasmon; simulation.
International Journal of Nanoparticles, 2015 Vol.8 No.1, pp.51 - 60
Received: 30 Jun 2014
Accepted: 17 Oct 2014
Published online: 02 Jul 2015 *