Anomalous transparency of photons in non-Markovian coupled waveguides

TL;DR

This paper investigates photon transmission in coupled waveguides with one coupled to a non-Markovian reservoir, revealing regimes of transmission and a loss-induced transparency effect influenced by reservoir frequency distribution.

Contribution

It introduces a detailed analysis of photon transmission in non-Markovian coupled waveguides, highlighting novel regimes and the loss-induced transparency phenomenon.

Findings

Four distinct transmission regimes identified

Launching photons in the lossy waveguide can enhance transmission

Loss-induced transparency depends on reservoir frequency distribution

Abstract

The transmission of photons through a pair of coupled single-mode waveguides is studied in detail. It is assumed that one of the waveguides is coupled to a non-Markovian reservoir, described by a Lorentzian spectrum distribution. We identified four distinct regimes for the transmission coefficient and found that, in some conditions, it is more efficient to launch the photons in the lossy waveguide to achieve high transmission. We also report on a loss-induced transparency effect that is induced by the distribution of the frequencies present in the reservoir.