Asymmetric adiabatic couplers for fully-integrated broadband quantum-polarization state preparation

Chung, HP; Huang, KH; Wang, K; Yang, SL; Yang, SY; Sung, CI; Solntsev, AS; Sukhorukov, AA; Neshev, DN; Chen, YH

Asymmetric adiabatic couplers for fully-integrated broadband quantum-polarization state preparation

Chung, HP Huang, KH Wang, K Yang, SL Yang, SY Sung, CI Solntsev, AS

Sukhorukov, AA Neshev, DN Chen, YH

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Publication Type:: Journal Article
Citation:: Scientific Reports, 2017, 7 (1)
Issue Date:: 2017-12-01

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Field	Value	Language
dc.contributor.author	Chung, HP	en_US
dc.contributor.author	Huang, KH	en_US
dc.contributor.author	Wang, K	en_US
dc.contributor.author	Yang, SL	en_US
dc.contributor.author	Yang, SY	en_US
dc.contributor.author	Sung, CI	en_US
dc.contributor.author	Solntsev, AS https://orcid.org/0000-0003-4981-9730	en_US
dc.contributor.author	Sukhorukov, AA	en_US
dc.contributor.author	Neshev, DN	en_US
dc.contributor.author	Chen, YH	en_US
dc.date.available	2017-11-21	en_US
dc.date.issued	2017-12-01	en_US
dc.identifier.citation	Scientific Reports, 2017, 7 (1)	en_US
dc.identifier.uri	http://hdl.handle.net/10453/123567
dc.description.abstract	© 2017 The Author(s). Spontaneous parametric down-conversion (SPDC) is a widely used method to generate entangled photons, enabling a range of applications from secure communication to tests of quantum physics. Integrating SPDC on a chip provides interferometric stability, allows to reduce a physical footprint, and opens a pathway to true scalability. However, dealing with different photon polarizations and wavelengths on a chip presents a number of challenging problems. In this work, we demonstrate an on-chip polarization beam-splitter based on z-cut titanium-diffused lithium niobate asymmetric adiabatic couplers (AAC) designed for integration with a type-II SPDC source. Our experimental measurements reveal unique polarization beam-splitting regime with the ability to tune the splitting ratios based on wavelength. In particular, we measured a splitting ratio of 17 dB over broadband regions (>60 nm) for both H-and V-polarized lights and a specific 50%/50% splitting ratio for a cross-polarized photon pair from the AAC. The results show that such a system can be used for preparing different quantum polarization-path states that are controllable by changing the phase-matching conditions in the SPDC over a broad band. Furthermore, we propose a fully integrated electro-optically tunable type-II SPDC polarization-path-entangled state preparation circuit on a single lithium niobate photonic chip.	en_US
dc.relation.ispartof	Scientific Reports	en_US
dc.relation.isbasedon	10.1038/s41598-017-17094-7	en_US
dc.title	Asymmetric adiabatic couplers for fully-integrated broadband quantum-polarization state preparation	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	7	en_US
utslib.for	0206 Quantum Physics	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access
pubs.issue	1	en_US
pubs.publication-status	Published	en_US
pubs.volume	7	en_US

Abstract:

© 2017 The Author(s). Spontaneous parametric down-conversion (SPDC) is a widely used method to generate entangled photons, enabling a range of applications from secure communication to tests of quantum physics. Integrating SPDC on a chip provides interferometric stability, allows to reduce a physical footprint, and opens a pathway to true scalability. However, dealing with different photon polarizations and wavelengths on a chip presents a number of challenging problems. In this work, we demonstrate an on-chip polarization beam-splitter based on z-cut titanium-diffused lithium niobate asymmetric adiabatic couplers (AAC) designed for integration with a type-II SPDC source. Our experimental measurements reveal unique polarization beam-splitting regime with the ability to tune the splitting ratios based on wavelength. In particular, we measured a splitting ratio of 17 dB over broadband regions (>60 nm) for both H-and V-polarized lights and a specific 50%/50% splitting ratio for a cross-polarized photon pair from the AAC. The results show that such a system can be used for preparing different quantum polarization-path states that are controllable by changing the phase-matching conditions in the SPDC over a broad band. Furthermore, we propose a fully integrated electro-optically tunable type-II SPDC polarization-path-entangled state preparation circuit on a single lithium niobate photonic chip.

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http://hdl.handle.net/10453/123567