Slow light in molecular aggregates nanofilms

TL;DR

This paper investigates slow light effects in molecular aggregate nanofilms using coherent population oscillations, demonstrating enhanced delay, elimination of residual absorption, and an optical switch based on optical bistability.

Contribution

It introduces a novel approach to achieve slow light in molecular nanofilms with improved performance and proposes an optical switch leveraging optical bistability.

Findings

Enhanced GHz-range delay due to cooperative molecular behavior

Residual absorption in CPO processes is eliminated

Optical bistability enables switching between different delays

Abstract

We study slow light performance of molecular aggregates arranged in nanofilms by means of coherent population oscillations (CPO). The molecular cooperative behavior inside the aggregate enhances the delay of input signals in the GHz range in comparison with other CPO-based devices. Moreover, the problem of residual absorption present in CPO processes, is removed. We also propose an optical switch between different delays by exploiting the optical bistability of these aggregates.