Line-defect-induced bending and splitting of self-collimated beams in two-dimensional photonic crystals

Abstract

We show that line defects can give rise to the bending and splitting of self-collimated beams in two-dimensional photonic crystals from the equifrequency contour calculations and the finite-difference time-domain simulations. The power ratio between two split self-collimated beams can be controlled systematically by varying the radii of rods or holes in the line defect. We also show that the bending and controllable splitting of self-collimated beams can be useful in steering the flow of light in photonic crystal integrated light circuits.

Design of photonic crystal power beam splitters via corrugated and gratinglike surfaces

“…The study of the beam splitter with low energy loss has become an important aspect of PC-based optical devices. There are three main types of the beam splitter, such as power beam splitters [4][5][6][7][8][9][10][11][12][13][14], polarization beam splitters [15][16][17], and frequency beam splitters [18,19]. In this paper, we focus our attention on the design of power beam splitters.…”

Photonic crystal Mach-Zehnder interferometer operating in the self-collimation mode of light

“…The collimation effect in PhC is of increasing interest, both in terms of theoretical and practical research [6][7][8]. Although simple elements such as beam splitters and mirrors utilizing the collimated light have been realized [9][10][11][12]; a PhC MZI has not yet been demonstrated experimentally. Figure 1.…”

Compact Mach-Zehnder interferometer based on self-collimation of light in a silicon photonic crystal

“…Self-collimation can be made functional in several ways, the most evident one being self-guiding of light [8,10,11], which makes fabricated waveguides superfluous. Although beam splitters and mirrors inside a PhC operating in the self-collimation mode have been realized and studied as separate elements [11][12][13] …”