Title :
Design of a compact grating coupler with controllable linewidths via transverse resonance and evanescent field coupling
Author :
Saha, Tapas Kumar ; Lu, Mingyu ; Zhai, Huiqing ; Zhao, Deyin ; Zhou, Weidong ; Ma, Zhenqiang
Author_Institution :
Dept. of Electr. Eng., Univ. of Texas at Arlington, Arlington, TX, USA
Abstract :
We report here a compact, efficient second-order grating coupler for normally incident light. Through making use of transverse resonance and evanescent field coupling, the coupler designed, exhibits high frequency-selectiveness with controllable linewidths. Full-wave simulations based on finite-difference-time-domain method demonstrate linewidth as small as 3 nm at wavelengths 1.497 μm and 1.514 μm.
Keywords :
diffraction gratings; finite difference time-domain analysis; optical couplers; optical design techniques; compact grating coupler; controllable linewidth; controllable linewidths; evanescent field coupling; finite-difference time-domain method; high frequency selectiveness; normally incident light; size 3 nm; transverse resonance; wavelength 1.497 mum to 1.514 mum; Couplers; Couplings; Finite difference methods; Finite element methods; Gratings; Reflection; Time domain analysis;
Conference_Titel :
Winter Topicals (WTM), 2011 IEEE
Conference_Location :
Keystone, CO
Print_ISBN :
978-1-4244-8428-7
DOI :
10.1109/PHOTWTM.2011.5730087
