Title :
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
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;
Conference_Titel :
Numerical Simulation of Optoelectronic Devices, 2007. NUSOD '07. International Conference on
Conference_Location :
Newark, DE
Print_ISBN :
978-1-4244-1431-4
DOI :
10.1109/NUSOD.2007.4349007
