Self-collimating photonic crystal polarization beam splitter

Abstract

We present theoretical and experimental results of a polarization splitter device that consists of a photonic crystal (PhC) slab, which exhibits a large reflection coefficient for TE and a high transmission coefficient for TM polarization. The slab is embedded in a PhC tile operating in the self-collimation mode. Embedding the polarization-discriminating slab in a PhC with identical lattice symmetry suppresses the in-plane diffraction losses at the PhC-non-PhC interface. The optimization of the PhC-non-PhC interface is thereby decoupled from the optimization of the polarizing function. Transmissions as high as 35% for TM- and 30% for TE-polarized light are reported.

Analysis of Self-Collimation Based Cavity Resonator Formed by Photonic Crystal

“…Figure 3(d) reveals the case of destructive interference as per Equation (5). With respect to Figure 3(a), the source is moved up by λ/4 (so that a path difference of λ/2 is achieved between the CW and CCW propagating beams) in Figure 3(d).…”

“…In particular, the two main branches of the anomalous dispersion in photonic crystals consisting of flat dispersion regime (results in self-collimation) [2] and convex/concave shaped dispersion regime (results in all angle negative refraction) [3] offer novel photonic elements like sharp bends [4], beam splitters [5] and sub-wavelength imaging lens [6], open cavities [7,8] respectively. Among these, PCs are given much attention for the confinement of electromagnetic waves and localization of photons in the form of realization of cavity resonating structures [7][8][9].…”

Thermal Effect of Er3+Ions Embedded in Smart Nano-Composite Oxide Material Prepared by Sol-Gel Technique

“…Then the light propagation processing can transmit the light from one point to another using optical waveguide systems [5][6][7][8][9].…”

Reduction of Propagation Loss in Pillar-Based Photonic Crystal Waveguides

“…Furthermore, their special properties can be used to design devices based on new principles. Examples of this type of devices are polarization splitters and wavelength division multiplexers [4], [5]. The main issue for integration of PhC-based devices in PICs are the losses; those of PhC devices should be comparable or smaller than those of classical waveguide devices to be able to compete with them.…”