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

Cheng Wang; Carsten Langrock; Alireza Marandi; Marc Jankowski; Mian Zhang; Boris Desiatov; Martin M. Fejer; Marko Lončar

doi:10.1364/OPTICA.5.001438

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

Cheng Wang
, Carsten Langrock
, Alireza Marandi
, Marc Jankowski
, Mian Zhang
, Boris Desiatov
, Martin M. Fejer
, Marko Lončar

Harvard University
City University of Hong Kong
Stanford University
California Institute of Technology

Research output: Contribution to journal › Letter › peer-review

691 Scopus citations

Abstract

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 − cm² 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 quan-tum photonic systems.

Original language	English
Pages (from-to)	1438-1441
Number of pages	4
Journal	Optica
Volume	5
Issue number	11
DOIs	https://doi.org/10.1364/OPTICA.5.001438
State	Published - 20 Nov 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 Optical Society of America.

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).

Funders	Funder number
National Science Foundation	EFMA-1741651, ECCS-1609549, ECCS-1609688, 1541959
Army Research Laboratory	W911NF-15-2-0060, W911NF-15-2-0067
Harvard University
City University of Hong Kong

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10.1364/OPTICA.5.001438

Cite this

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title = "Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides",

abstract = "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 − cm2 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 quan-tum photonic systems.",

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doi = "10.1364/OPTICA.5.001438",

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T1 - Ultrahigh-efficiency wavelength conversion in nanophotonic periodically poled lithium niobate waveguides

AU - Wang, Cheng

AU - Langrock, Carsten

AU - Marandi, Alireza

AU - Jankowski, Marc

AU - Zhang, Mian

AU - Desiatov, Boris

AU - Fejer, Martin M.

AU - Lončar, Marko

PY - 2018/11/20

Y1 - 2018/11/20

N2 - 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 − cm2 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 quan-tum photonic systems.

AB - 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 − cm2 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 quan-tum photonic systems.

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JO - Optica

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

Abstract

Bibliographical note

Funding

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