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Frontiers in Optics

Quantifying Non-Markovian Spontaneous Emission Dynamics near a MoS2 Nanodisk

Ioannis Thanopulos, Kostas Blekos, P. A. Kalozoumis, Emmanuel Paspalakis

Published Jan 1, 2020• 0 citations
Publisher

Abstract

We study the spontaneous emission dynamics of a quantum emitter near a MoS2 nanodisk and go beyond analyzing the reversible population dynamics of the excited state by quantifying the non-Markovian behavior using different non-Markovianity measures.
DOI
10.1364/fio.2020.jtu1a.22

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Modeling the spontaneous emission of a single-photon emitted from a quantum dot is important for several proposed solid-state quantum computers and quantum networks. In this study we seek to model the fully quantized excitation and spontaneous decay of a quantum dot state through the optical emission of a photon in the non-Markovian limit of the photon bath. We propose the use of discretized central-difference approximations of space and time partial derivatives to describe the interaction between single photon and quantum dot states.
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We study the spontaneous emission dynamics of a quantum emitter near a graphene nanodisk. We analyze the population dynamics of the excited state of the quantum emitter and also explore its dynamics as a non-Markovian open system. Specifically, we quantify the non-Markovian spontaneous emission dynamics using different non-Markovianity measures and calculate the quantum speed limit under non-Markovian evolution. We find strong light-matter coupling conditions for the quantum emitter near the graphene nanodisk, which are manifested in either distinct decaying Rabi oscillations or population trapping effects in the excited state population dynamics of the quantum emitter, depending on the parameters of the system. We also show that the values of the non-Markovianity measures and of the potential quantum speed up are large under strong light–matter coupling conditions.