• Open Access

Coherent Dynamics in Quantum Emitters under Dichromatic Excitation

Z. X. Koong, E. Scerri, M. Rambach, M. Cygorek, M. Brotons-Gisbert, R. Picard, Y. Ma, S. I. Park, J. D. Song, E. M. Gauger, and B. D. Gerardot
Phys. Rev. Lett. 126, 047403 – Published 26 January 2021
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Abstract

We characterize the coherent dynamics of a two-level quantum emitter driven by a pair of symmetrically detuned phase-locked pulses. The promise of dichromatic excitation is to spectrally isolate the excitation laser from the quantum emission, enabling background-free photon extraction from the emitter. While excitation is not possible without spectral overlap between the exciting pulse and the quantum emitter transition for ideal two-level systems due to cancellation of the accumulated pulse area, we find that any additional interactions that interfere with cancellation of the accumulated pulse area may lead to a finite stationary population inversion. Our spectroscopic results of a solid-state two-level system show that, while coupling to lattice vibrations helps to improve the inversion efficiency up to 50% under symmetric driving, coherent population control and a larger amount of inversion are possible using asymmetric dichromatic excitation, which we achieve by adjusting the ratio of the intensities between the red- and blue-detuned pulses. Our measured results, supported by simulations using a real-time path-integral method, offer a new perspective toward realizing efficient, background-free photon generation and extraction.

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  • Received 4 September 2020
  • Accepted 4 January 2021

DOI:https://doi.org/10.1103/PhysRevLett.126.047403

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied PhysicsAtomic, Molecular & Optical

Authors & Affiliations

Z. X. Koong1,*, E. Scerri1,‡, M. Rambach1,§, M. Cygorek1, M. Brotons-Gisbert1, R. Picard1, Y. Ma2, S. I. Park3, J. D. Song3, E. M. Gauger1, and B. D. Gerardot1,†

  • 1SUPA, Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
  • 2College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • 3Center for Opto-Electronic Materials and Devices Research, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea

  • *To whom correspondence should be addressed. zk49@hw.ac.uk
  • To whom correspondence should be addressed. b.d.gerardot@hw.ac.uk
  • Present address: Leiden University, P.O. Box 9504, 2300 RA Leiden, The Netherlands.
  • §Present address: Centre for Engineered Quantum Systems, School of Mathematics and Physics, University of Queensland, QLD 4072, Australia.

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Issue

Vol. 126, Iss. 4 — 29 January 2021

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