Mode Sensitivity Analysis of Subwavelength Grating Slot Waveguides

IEEE Photonics Journal

Karen Sloyan¹  Juan E. Villegas¹  Sujith Chandran¹  Marcus S. Dahlem¹  Mutasem Odeh¹  Krishna Twayana¹ 

[1] Electrical and Computer Engineering Department, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates;

关键词: Subwavelength grating;    slot waveguide;    silicon-on-insulator;    integrated optics;    sensor.;   

DOI  :  10.1109/JPHOT.2019.2939088

来源: DOAJ

【 摘 要 】

In this paper, we investigate the mode sensitivity (S_mode) of subwavelength grating slot (SWGS) waveguides. S_mode is an important parameter in various waveguide-based photonic circuits such as sensors, modulators, and thermally-controlled devices. It is a measure of the sensitivity of the waveguide effective index towards the refractive index perturbations in the cladding medium. The SWGS waveguide exhibits high mode sensitivity, as it combines sensitivity enhancement features of both slot and subwavelength grating waveguides. Finite-difference time-domain simulations are performed for the analysis, design, and optimization of the hybrid structure. The SWGS waveguide is incorporated into a Mach-Zehnder interferometer and fabricated on a silicon-on-insulator platform for the experimental estimation of S_mode. The measured S_mode value of 79% is consistent with the theoretical prediction of 83%.

【 授权许可】

Unknown