CaltechAUTHORS
Published June 1, 2022 | Version Accepted Version
Journal Article Open

Spectrally separable photon-pair generation in dispersion engineered thin-film lithium niobate

Creators

  • 1. ROR icon Harvard University
  • 2. ROR icon Stanford University
  • 3. ROR icon Massachusetts Institute of Technology
  • 4. ROR icon California Institute of Technology

Abstract

Existing nonlinear-optic implementations of pure, unfiltered heralded single-photon sources do not offer the scalability required for densely integrated quantum networks. Additionally, lithium niobate has hitherto been unsuitable for such use due to its material dispersion. We engineer the dispersion and the quasi-phasematching conditions of a waveguide in the rapidly emerging thin-film lithium niobate platform to generate spectrally separable photon pairs in the telecommunications band. Such photon pairs can be used as spectrally pure heralded single-photon sources in quantum networks. We estimate a heralded-state spectral purity of >94% based on joint spectral intensity measurements. Further, a joint spectral phase-sensitive measurement of the unheralded time-integrated second-order correlation function yields a heralded-state purity of (86 ± 5)%.

Additional Information

© 2022 Optica Publishing Group. Received 25 February 2022; revised 14 April 2022; accepted 5 May 2022; posted 6 May 2022; published 26 May 2022. The authors thank M. Yeh, S. Ghosh, M. Jankowski, M. Yu, B. Desiatov, and P. G. Kwiat for helpful discussions and assistance with the experiment. N.S. acknowledges funding from the AQT Intelligent Quantum Networks and Technologies (INQNET) research program. Funding. National Science Foundation (CCF-1918549, DMR-1231319, ECCS-1541959, ECCS-1542152, ECCS-1839197, ECCS-2026822, EEC-1941583, EFMA-1741651, OIA-2040695, OMA-2137723); U.S. Department of Energy (DE-AC02-76SF00515, DE-SC0020376); Army Research Office (W911NF2010248); National Center for Research Resources (S10RR02557401); Nippon Telegraph and Telephone (NTT Research 146395); Harvard Quantum Initiative (HQI Seed Funding). Data availability. Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request. Disclosures: M.L.: HyperLight Corporation (I,S).

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Accepted Version - 2202.12469.pdf

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2202.12469.pdf

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Additional details

Identifiers

Eprint ID
115758
Resolver ID
CaltechAUTHORS:20220722-768574000

Related works

Describes
10.1364/OL.456873 (DOI)
https://arxiv.org/abs/2202.12469 (URL)

Funding

NSF
CCF-1918549
NSF
DMR-1231319
NSF
ECCS-1541959
NSF
ECCS-1542152
NSF
ECCS-1839197
NSF
ECCS-2026822
NSF
EEC-1941583
NSF
EFMA-1741651
NSF
ITE-2040695
NSF
OMA-2137723
Department of Energy (DOE)
DE-AC02-76SF00515
Department of Energy (DOE)
DE-SC0020376
Army Research Office (ARO)
W911NF2010248
National Center for Research Resources (NCRR)
S10RR02557401
NTT Research
146395
Harvard Quantum Initiative
AQT Intelligent Quantum Networks and Technologies (INQNET)

Dates

Created
2022-07-26
Created from EPrint's datestamp field
Updated
2022-07-26
Created from EPrint's last_modified field

Caltech Custom Metadata

Caltech groups
INQNET