Concentric corrugations enhanced optical antenna for Raman scattering
Journal
JSAP-OSA Joint Symposium 2013 (The 74th JSAP Autumn Meeting 2013)
ISBN
978-4-86348-369-9
Date Issued
2013
Author(s)
Abstract
Optical antenna or nanoantenna, which can control the optical signal radiation and manipulate the light energy at the tiny region, has attracted more attentions for various applications during these years [1, 2]. For example, the nanoplasmonic structures were used to enhance the surface enhanced Raman scattering (SERS) signals for biological or chemical sensing application [3, 4]. A. Ahmed and R. Gordon put a circular reflector around the optical dipole antenna to boost the Raman signals and studied the emission pattern of the radiated signal from the directive optical antenna [5, 6]. Because the spot size of the exciting source is usually larger than the nanoantenna area, the surrounding light energy could not be all focused on the gap of the optical antenna. On the other hand, the bull's eye structures can be used for collecting light energy into the center of the rings [7]. Thus, we propose to study a structure which combines the bull's eye structure and optical antenna with a reflective layer beneath it.
SDGs
Type
conference paper