Design and Simulation of Mode (De)multiplexers on SOI using Shortcuts to Adiabaticity

Abstract

This thesis is devoted to the theoretical investigation and numerical simulations of mode (de)multiplexers based on silicon-on-insulator (SOI) The mode (de)multiplexers in this thesis are based on asymmetrical directional couplers (ADCs) and designed using shortcuts to adiabaticity (STA) First we will introduce the theory of coupled-waveguide system and the quantum?optical analogies between weakly-coupled waveguide structure and two-level system driven by near-resonant laser light By means of the analogies the STA protocol is introduced into coupled-waveguide system In this way the coupling coefficient and propagation constants mismatch can be engineered to optimize the device robustness Then we emphasize the applicability of the STA protocol to the SOI material system the high index contrast of SOI also allows devices to be more compact The simulation results agree with the theoretical predictions and show that the mode (de)multiplexers using STA are broadband and have large fabrication tolerance

Date of Award	2015 Jul 9
Original language	English
Supervisor	Shuo-Yen Tseng (Supervisor)