Complete 2{\pi} Phase Control by Photonic Crystal Slabs

TL;DR

This paper introduces a novel method for achieving complete 2π phase control in reflected light using photonic crystal slabs, verified through simulations and analysis, with potential applications in sensing and beam steering.

Contribution

The study presents a new full 2π phase control technique in photonic crystal slabs, leveraging asymmetric coupling and resonant modes, applicable to silicon photonics platforms.

Findings

Achieved full 2π phase shift in reflected light.

Validated the method with temporal coupled-mode analysis and S-parameter simulations.

Applicable to silicon-on-silica and silicon-on-insulator platforms.

Abstract

Photonic crystal slabs are the state of the art in studies for the light confinement, optical wave modulating and guiding, as well as nonlinear optical response. Previous studies have shown abundant real-world implementations of photonic crystals in planar optics, metamaterials, sensors, and lasers. Here, we report a novel full 2{\pi} phase control method in the reflected light beam over the interaction with a photonic crystal resonant mode, verified by the temporal coupled-mode analysis and S-parameter simulations. Enhanced by the asymmetric coupling with the output ports, the 2{\pi} phase shift can be achieved with the silicon photonics platforms such as Silicon-on-Silica and Silicon-on-Insulator heterostructures. Such photonic crystal phase control method provides a general guide in the design of phase-shift metamaterials, suggesting a wide range of applications in the field of sensing, spatial light modulation, and beam steering.