Design of plasmonic photonic crystal resonant cavities for polarization sensitive infrared photodetectors

TL;DR

This paper presents a novel polarization-sensitive resonator design for midinfrared photodetectors using photonic crystal cavities and plasmonic waveguides to enhance optical confinement and detector efficiency.

Contribution

The work introduces a new cavity structure that is highly frequency and polarization-sensitive, enabling advanced chip-based infrared spectrometry and imaging.

Findings

Enhanced optical confinement within the active region.

High polarization sensitivity of the resonator.

Potential for high-precision material and temperature discrimination.

Abstract

We design a polarization-sensitive resonator for use in midinfrared photodetectors, utilizing a photonic crystal cavity and a single or double-metal plasmonic waveguide to achieve enhanced detector efficiency due to superior optical confinement within the active region. As the cavity is highly frequency and polarization-sensitive, this resonator structure could be used in chip-based infrared spectrometers and cameras that can distinguish among different materials and temperatures to a high degree of precision.