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Published November 17, 2022 | Published + Supplemental Material
Journal Article Open

Spectral control of nonclassical light pulses using an integrated thin-film lithium niobate modulator

Abstract

Manipulating the frequency and bandwidth of nonclassical light is essential for implementing frequency-encoded/multiplexed quantum computation, communication, and networking protocols, and for bridging spectral mismatch among various quantum systems. However, quantum spectral control requires a strong nonlinearity mediated by light, microwave, or acoustics, which is challenging to realize with high efficiency, low noise, and on an integrated chip. Here, we demonstrate both frequency shifting and bandwidth compression of heralded single-photon pulses using an integrated thin-film lithium niobate (TFLN) phase modulator. We achieve record-high electro-optic frequency shearing of telecom single photons over terahertz range (±641 GHz or ±5.2 nm), enabling high visibility quantum interference between frequency-nondegenerate photon pairs. We further operate the modulator as a time lens and demonstrate over eighteen-fold (6.55 nm to 0.35 nm) bandwidth compression of single photons. Our results showcase the viability and promise of on-chip quantum spectral control for scalable photonic quantum information processing.

Additional Information

© The Author(s) 2022. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. We thank Brian J. Smith, Karl Berggren, Marco Colangelo, Marco Turchetti, and Mina Bionta for helpful discussions and assistance in measurement. This work is supported by Harvard Quantum Initiative (HQI), ARO/DARPA (W911NF2010248), AFOSR (FA9550-20-1-01015), DARPA LUMOS (HR0011-20-C-0137), DOE (DE-SC0020376), NSF (EEC-1941583, ECCS-1839197), and AFRL (FA9550-21-1-0056). D.Z. acknowledges support by HQI post-doctoral fellowship and A*STAR SERC Central Research Fund (CRF). N.S. acknowledges support by the AQT Intelligent Quantum Networks and Technologies (INQNET) research program. Device fabrication was performed at the Harvard University Center for Nanoscale Systems. Author contributions. D.Z., M.Yu., N.S., and M.L. conceived and designed the experiment. M.Yu. designed the modulator. L.H., C.R., and M.Z. fabricated the modulator. D.Z., C.C., M.Yu., and L.S. carried out the measurement and analyzed the data with the help of Y.H., C.J.X, M.Yeh., S.G. and N.S. All authors contributed to writing the manuscript. M.L. and F.N.C.W. supervised the project. These authors contributed equally: Di Zhu, Changchen Chen, Mengjie Yu. Conflict of interest. M.Z., L.H., C.R., and M.L. are involved in developing lithium niobate technologies at HyperLight Corporation.

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Published - 41377_2022_Article_1029.pdf

Supplemental Material - 41377_2022_1029_MOESM1_ESM.pdf

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Additional details

Created:
August 22, 2023
Modified:
October 24, 2023