Highly Amplified Light Transmission in Parity-Time Symmetric Multilayered Structure

TL;DR

This paper introduces a parity-time symmetric multilayered structure that enables highly amplified infrared light transmission, validated through theoretical analysis and numerical simulation, by exploiting spectral singularities related to layer thickness and gain/loss parameters.

Contribution

It presents a novel dielectric-nanofilm-dielectric multilayer design that achieves amplified optical transmission using PT symmetry and spectral singularities, validated by transfer matrix and FDTD methods.

Findings

Spectral singularities can be generated by adjusting layer thickness and gain/loss.

The structure achieves highly amplified transmission at specific wavelengths.

Theoretical results are confirmed by numerical FDTD simulations.

Abstract

We propose a parity-time symmetric dielectric-nanofilm-dielectric multilayered structure that could facilitate highly amplified transmission of optical power in the infrared spectrum. We have theoretically studied our model using the transfer matrix formalism. The reflection and the transmission coefficients of the S-matrix are evaluated. The theoretical results are validated by FDTD numerical simulation. We have shown how the thickness of the layers and the gain/loss coefficient of the active layers could generate spectral singularities in the S-matrix and how these singularities could be exploited to achieve amplified transmission of a single wavelength through the structure.