Title :
Design and modeling of a tunable optical antenna enabled by a micromachined actuator
Author :
Penmetsa, Siva ; Zhang, Tianhua ; Gong, Zhongcheng ; Lee, Tae-Woo ; Que, Long
Author_Institution :
Inst. for Micromanufacturing, Louisiana Tech Univ., Ruston, LA
Abstract :
A MEMS-based tunable optical nanoantenna is described. The optical performance of the tunable antenna has been investigated using rigorous finite difference time domain (FDTD) method. It reveals that peak wavelengths and local field enhancements are largely affected by the size and shape of the bowtie antenna. The optical field can be drastically enhanced by reducing the gap size less than 30 nm which can easily be achieved by the MEMS system. Studies for field localization also shows possibility of bowtie antennas producing isotropic field patterns with an aspect ratio close to one, essential for full 2-D surface scanning purposes.
Keywords :
actuators; bow-tie antennas; finite difference time-domain analysis; micro-optomechanical devices; micromachining; optical sensors; 2-D surface scanning; FDTD; MEMS; bowtie antenna; field localization; finite difference time domain method; micromachined actuator; optical antenna; Actuators; Biomedical optical imaging; Finite difference methods; Micromechanical devices; Nanostructures; Optical design; Optical films; Spectroscopy; Time domain analysis; Tunable circuits and devices; MEMS; nanophotonics; optical antenna; thermal actuator;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2009. NEMS 2009. 4th IEEE International Conference on
Conference_Location :
Shenzhen
Print_ISBN :
978-1-4244-4629-2
Electronic_ISBN :
978-1-4244-4630-8
DOI :
10.1109/NEMS.2009.5068553
