All optical switching of a single photon stream by excitonic depletion

Guillermo Muñoz-Matutano*, Mattias Johnsson, Juan Martínez-Pastor, David Rivas Góngora, Luca Seravalli, Giovanna Trevisi, Paola Frigeri, Thomas Volz, Massimo Gurioli

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)
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Single semiconductor quantum dots have been extensively used to demonstrate the deterministic emission of high purity single photons. The single photon emission performance of these nanostructures has become very well controlled, offering high levels of photon indistinguishability and brightness. Ultimately, quantum technologies will require the development of a set of devices to manipulate and control the state of the photons. Here we measure and simulate a novel all-optical route to switch the single photon stream emitted from the excitonic transition in a single semiconductor quantum dot. A dual non-resonant excitation pumping scheme is used to engineer a switching device operated with GHz speeds, high differential contrasts, ultra-low power consumption and high single photon purity. Our device scheme can be replicated in many different zero dimensional semiconductors, providing a novel route towards developing a platform-independent on-chip design for high speed and low power consumption quantum devices.

Original languageEnglish
Article number29
Pages (from-to)1-9
Number of pages9
JournalCommunications Physics
Issue number1
Publication statusPublished - 31 Jan 2020

Bibliographical note

© The Author(s) 2020. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


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