Compact Bidirectional Polarization Splitting Antenna

IEEE Photonics Journal

Fan Lu¹  Feng Xiao²  Anshi Xu³  Guangyuan Li³ 

[1] $^{1}$State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing, China;$^{2}$WA Center of Excellence for MicroPhotonic System, Electron Science Research Institute, Edith Cowan University, Joondalup, Australia;State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing, China;

关键词: Engineered photonic nanostructures;    micro and nano antennas;    subwavelength structures;   

DOI  :  10.1109/JPHOT.2012.2215020

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown