Design of unidirectional subwavelength slit coupler for THz surface plasmons

Author

Gan, Qiaoqiang ; Fu, Zhan ; Ding, Yujie J. ; Bartoli, Filbert J.

Author_Institution

Lehigh Univ., Bethlehem

fYear

2007

Firstpage

27

Lastpage

28

Abstract

In this paper, we demonstrate a unidirectional subwavelength slit coupler at THz frequencies by using two-dimensional finite difference time domain (FDTD) modeling. The near-field light emitted from the narrow slit serves as a subwavelength-scaled excitation source. By placing a particular grating structure on one side of the slit, the light could be guided in only one direction. This unidirectional subwavelength slit coupler is amenable to incorporation into optical integrated circuits at THz frequencies.

Keywords

diffraction gratings; finite difference time-domain analysis; integrated optics; optical couplers; optical design techniques; submillimetre wave couplers; surface plasmons; 2D FDTD model; 2D finite difference time domain model; THz surface plasmons; grating structure; optical design; optical integrated circuits; unidirectional subwavelength slit coupler; Coupling circuits; Finite difference methods; Frequency; Gratings; Integrated optics; Optical coupling; Photonic integrated circuits; Plasmons; Stimulated emission; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Numerical Simulation of Optoelectronic Devices, 2007. NUSOD '07. International Conference on

Conference_Location

Newark, DE

Print_ISBN

978-1-4244-1431-4

Type

conf

DOI

10.1109/NUSOD.2007.4349007

Filename

4349007