Abstract
We propose a Mach–Zehnder interferometer (MZI) based on coupleddielectric pillars. It is composed of single-row pillar coupledwaveguide modulating arms and three-row pillar waveguide 3 dB couplers.The slow light property and transmission loss of the single-row pillarmodulating arm are optimized by the plane wave expansion method. A short3 dB coupler is designed based on the modes transformation in three-rowpillar waveguide. Finite difference time domain simulations prove thevalidity of this MZI and show that it has low insertion loss of<1.1 dB and high extinction ratio of >12 dB.
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