Broadband extraordinary transmission in a single sub-wavelength aperture.
Coordinate transformation is applied to design an all-dielectric device for Extraordinary Transmission (ET) in a single sub-wavelength slit. The proposed device has a broadband feature and can be applied from microwave to visible frequency bands. Finite-Difference Time-Domain (FDTD) simulations are used to verify the device's performance. The results show that significantly increased transmission is achieved through the sub-wavelength aperture from 4 GHz to 8 GHz when the device is applied. In contrast with previously reported systems, the frequency sensitivity of the new device is very low.
Tang
Wenxuan
W
Department of Electronic Engineering, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
Hao
Yang
Y
Medina
Francisco
F
D004867:Equipment Design; D008027:Light; D008872:Microwaves; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation