10.1063/1.4896519.1

Abstract

This work studies the phase contributions of a photonic crystal waveguide resonator. When studying the transmission spectrum of such resonators oscillations of group index are observed that can not be described by typical models conventionally used for analysis. We develop a simple mathematical tool capable of describing these oscillations. Furthermore, we carry out experiments on a Si photonic crystal waveguide resonator and apply that tool extracting phase contributions of the photonic crystal waveguide terminations.