Title

Compact bidirectional polarization splitting antenna

Document Type

Journal Article

Faculty

Faculty of Computing, Health And Science

School

School of Engineering

RAS ID

15153

Comments

This article was originally published as: Lu, F., Li, G., Xiao, F. , & Xu, A. (2012). Compact bidirectional polarization splitting antenna. IEEE Photonics Journal, 4(5), 1744-1751. Original article available here

Abstract

A compact bidirectional polarization splitting antenna (BPSA) composed of a patterned metallic structure coated by a thin dielectric film is proposed and theoretically investigated. Using a polarization-selective array of grooves, the backside illuminated light transmitted through the central nanoslit is split and coupled into TM- and TE-polarized modes supported by the metal-dielectric-air (MDA) configuration. The operation principle of the structure is clarified and theoretically illustrated by utilizing the fully vectorial aperiodic Fourier modal method (a-FMM). Numerical simulations show that insertion losses (ILs) less than 4 dB, polarization extinction ratios (PERs) better than 18 dB, and crosstalk (CR) less than $-$ 18 dB are achieved for both polarizations in the wavelength range 1510-1570 nm. The structure will find potential applications in highly integrated polarization diversity systems and photonic integrated circuit.

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