Super-transmission from a finite subwavelength arrangement of slits in a metal film

Date

2014-05-27

Authors

Chen, Shuwen
Jin, Shilong
Gordon, Reuven

Journal Title

Journal ISSN

Volume Title

Publisher

Optics Express

Abstract

A theory is presented for the transmission of transverse magnetic waves through a finite number of subwavelength slits in metal film. While a single slit achieves the single channel limit on resonance, multiple slits show super-transmission exceeding the single channel limit. The phenomenon of super-transmission is revealed as a result of cross-coupling of modes and confirmed by simulations. The influence of finite permittivity in the IR and microwave regime is included by perturbative corrections to the theory. The theory agrees quantitatively with past experiments and finite-difference time-domain simulations. By considering two or more modes in the slit region, our theory provides an approach to the analysis of cross-coupling among slits, which allows for super-transmission and features of a Fano resonance.

Description

Keywords

Subwavelength structures, Plasmonics, Coupled resonators

Citation

Chen, S., Jin, S. & Gordon, R. (2014). Super-transmission from a finite subwavelength arrangement of slits in a metal film. Optics Express, 22(11), 13418- 13426.