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Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides

Wang, Cheng and Langrock, Carsten and Marandi, Alireza and Jankowski, Marc and Zhang, Mian and Desiatov, Boris and Fejer, Martin M. and Lončar, Marko (2018) Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides. Optica, 5 (11). pp. 1438-1441. ISSN 2334-2536.

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Periodically poled lithium niobate (PPLN) waveguides are a powerful platform for efficient wavelength conversion. Conventional PPLN converters, however, typically require long device lengths and high pump powers due to the limited nonlinear interaction strength. Here we use a nanostructured PPLN waveguide to demonstrate an ultrahigh normalized efficiency of 2600%/W−cm^2 for second-harmonic generation of 1.5 μm radiation, more than 20 times higher than that in state-of-the-art diffused waveguides. This is achieved by a combination of sub-wavelength optical confinement and high-fidelity periodic poling at a first-order poling period of 4 μm. Our highly integrated PPLN waveguides are promising for future chip-scale integration of classical and quantum photonic systems.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Wang, Cheng0000-0002-1939-1422
Langrock, Carsten0000-0002-2947-5312
Marandi, Alireza0000-0002-0470-0050
Jankowski, Marc0000-0003-1845-7415
Zhang, Mian0000-0001-9838-3895
Fejer, Martin M.0000-0002-5512-1905
Additional Information:© 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Received 3 August 2018; revised 9 October 2018; accepted 14 October 2018 (Doc. ID 341478); published 7 November 2018. Device fabrication was performed in part at the Harvard University Center for Nanoscale Systems (CNS), a member of the NNCI. Funding: National Science Foundation (NSF) (ECCS-1609549, ECCS-1609688, EFMA-1741651, 1541959); Army Research Laboratory (ARL) (W911NF-15-2-0060, W911NF-15-2-0067); Harvard University (PSE Accelerator Award); City University of Hong Kong (CityU) (Start-up Grant).
Funding AgencyGrant Number
Army Research LaboratoryW911NF-15-2-0060
Army Research Office (ARO)W911NF-15-2-0067
Harvard UniversityUNSPECIFIED
City University of Hong KongUNSPECIFIED
Issue or Number:11
Record Number:CaltechAUTHORS:20181205-145145556
Persistent URL:
Official Citation:Cheng Wang, Carsten Langrock, Alireza Marandi, Marc Jankowski, Mian Zhang, Boris Desiatov, Martin M. Fejer, and Marko Lončar, "Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides," Optica 5, 1438-1441 (2018)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:91515
Deposited By: George Porter
Deposited On:06 Dec 2018 00:04
Last Modified:09 Mar 2020 13:19

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