Soi photonic crystal waveguides operating in telecommunication range for integrated circuits#

Abstract

In this report, we present the design and the numerical investigation of the mode property of SOI photonic crystal waveguide (SOI PCWs) operating in telecommunication range, i.e., O-band (1260–1360 nm) with TE polarization. The SOI PCWs including conventional W1 and slot SOI PCWs have been designed to exploit two kinds of mode: W1-like and true-slot. For that purpose, the geometric parameters of the SOI PCW with the triangular PhC structure are chosen as follows. The thickness of the silicon slab is fixed at 300 nm, the size of the hole is about 210 nm and the lattice constant is selected of 340 nm. The width of the waveguide is modified from W1 to W1.50 and the width of the slot was selected from 100 nm to 150 nm to engineer the W1-like and true slot modes. The covering material with a refractive index of 1.445 corresponding to some active materials is considered. The demonstrated SOI PCWs in this work might find applications in optical integrated circuits, monitoring or sensing purposes.