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

Shuwen Chen | Zendy; Shilong Jin | Zendy; Reuven Gordon | Zendy

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

Author(s) -

Shuwen Chen,

Shilong Jin,

Reuven Gordon

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.013418

Subject(s) - optics , physics , extraordinary optical transmission , finite difference time domain method , transmission (telecommunications) , fano resonance , coupling (piping) , limit (mathematics) , transmission coefficient , coupled mode theory , resonance (particle physics) , microwave , permittivity , near field optics , transverse plane , surface plasmon , surface plasmon polariton , materials science , plasmon , refractive index , dielectric , quantum mechanics , telecommunications , mathematical analysis , mathematics , optical microscope , structural engineering , computer science , engineering , scanning electron microscope , metallurgy

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.

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