Title :
Design silicon based race track resonators using FDTD
Author :
Lorattanaruangkit, W. ; Somkuarnpanit, S. ; Sae-Tung, K.
Author_Institution :
Fac. of Eng., King Mongkut´´s Inst. of Technol., Bangkok, Thailand
Abstract :
A racetrack resonator can be designed using the FDTD method by considering the device as a combination of straight and curved waveguides. The in-substrate and on-substrate structures on the silicon-silicon dioxide substrate have been considered in the analysis. The coupling length of the straight section has to be considered, which approximately varies with the width and the thickness, whereas the curved section defines the coupling efficiency, which is defined by the width and the radius of the guide. The best-dimensions of the racetrack to operate at 1.55 μm with a gap of 0.2 μm are the thickness of 0.4 μm, the width of 0.4 μm with the corresponding coupling length of 7 μm, and the smallest feasible radius. For a radius of several microns the racetrack could operate with the free spatial range of several tens of nanometers and the quality factor greater than hundred
Keywords :
finite difference time-domain analysis; integrated optics; optical design techniques; optical directional couplers; optical resonators; optical waveguides; silicon; 0.2 to 7 micron; 1.55 micron; FDTD method; Si; Si-SiO2; Si-based race track resonators; SiO2; coupling length; curved waveguides; quality factor; straight waveguides; Directional couplers; Finite difference methods; Optical filters; Optical modulation; Optical refraction; Optical resonators; Optical ring resonators; Optical variables control; Silicon; Time domain analysis;
Conference_Titel :
Microwave Conference, 2000 Asia-Pacific
Conference_Location :
Sydney, NSW
Print_ISBN :
0-7803-6435-X
DOI :
10.1109/APMC.2000.926042
