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IEEE Photonics Conference

Effect of an incoherent pumping field and tunnelling rate on optically controllable switching for light propagation in a InAs quadruple-coupled quantum dot molecule nanostructure

Mohammad Reza Ghorbani Fard, Olesya V. Vershinina, A. V. Katsaba

Published Nov 10, 2024• 0 citations
Publisher

Abstract

We propose using a nanostructure with quantum dots to switch light pulses between superluminal and subluminal propagation. Additionally, by adjusting tunneling rates and incoherent pumping field, the speed of light pulses can be controlled with a 5 ps switching time.
DOI
10.1109/ipc60965.2024.10799528

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A switch is proposed for controlling the subluminal and superluminal light propagation through the triple coupled quantum dots system. The steady-state and transient behavior of the absorption and the dispersion of a probe pulse through a triple quantum dots molecule are investigated. We demonstrate that the group velocity of a light pulse can be controlled from subluminal to superluminal or vice versa by controlling the rates of incoherent pumping and tunneling between electronic levels. Switching time is calculated by discussing the dependency of optical transient properties on the incoherent pumping and inter-dot tunneling rates. We introduce three controlling parameters that make it possible to control the wave propagation electrically or even optically in such coupled quantum dot systems.
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