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Microwave-to-optical conversion using lithium niobate thin-film acoustic resonators

Shao, Linbo and Yu, Mengjie and Maity, Smarak and Sinclair, Neil and Zheng, Lu and Chia, Cleaven and Shams-Ansari, Amirhassan and Wang, Cheng and Zhang, Mian and Lai, Keji and Lončar, Marko (2019) Microwave-to-optical conversion using lithium niobate thin-film acoustic resonators. Optica, 6 (12). pp. 1498-1505. ISSN 2334-2536.

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Acoustic or mechanical resonators have emerged as a promising means to mediate efficient microwave-to-optical conversion. Here, we demonstrate conversion of microwaves up to 4.5 GHz in frequency to 1500 nm wavelength light using optomechanical interactions on suspended thin-film lithium niobate. Our method uses an interdigital transducer that drives a freestanding 100 μm-long thin-film acoustic resonator to modulate light traveling in a Mach–Zehnder interferometer or racetrack cavity. The strong microwave-to-acoustic coupling offered by the transducer in conjunction with the strong photoelastic, piezoelectric, and electro-optic effects of lithium niobate allows us to achieve a half-wave voltage of Vπ = 4.6 V and Vπ = 0.77 V for the Mach–Zehnder interferometer and racetrack resonator, respectively. The acousto-optic racetrack cavity exhibits an optomechanical single-photon coupling strength of 1.1 kHz. To highlight the versatility of our system, we also demonstrate a microwave photonic link with unitary gain, which refers to a 0 dB microwave power transmission over an optical channel. Our integrated nanophotonic platform, which leverages the compelling properties of lithium niobate, could help enable efficient conversion between microwave and optical fields.

Item Type:Article
Related URLs:
URLURL TypeDescription Material Paper
Shao, Linbo0000-0002-0615-7848
Yu, Mengjie0000-0002-7815-4195
Shams-Ansari, Amirhassan0000-0002-2165-7832
Wang, Cheng0000-0002-1939-1422
Zhang, Mian0000-0001-9838-3895
Lončar, Marko0000-0002-5029-5017
Additional Information:© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Received 8 July 2019; revised 9 September 2019; accepted 10 September 2019 (Doc. ID 372069); published 2 December 2019. N. S. acknowledges support by the Natural Sciences and Engineering Research Council of Canada (NSERC), the AQT Intelligent Quantum Networks and Technologies (INQNET) research program, and by the DOE/HEP QuantISED program grant, QCCFP (Quantum Communication Channels for Fundamental Physics). Funding: National Science Foundation (DMR-1707372, DMR-1231319, ECCS-1740296, ECCS-1810233); Office of Naval Research (N00014-15-1-2761); Natural Sciences and Engineering Research Council of Canada; U.S. Department of Energy (DE-SC0019219).
Funding AgencyGrant Number
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
AQT Intelligent Quantum Networks and Technologies (INQNET)UNSPECIFIED
Department of Energy (DOE)DE-SC0019219
Office of Naval Research (ONR)N00014-15-1-2761
Issue or Number:12
Record Number:CaltechAUTHORS:20200116-084442033
Persistent URL:
Official Citation:Linbo Shao, Mengjie Yu, Smarak Maity, Neil Sinclair, Lu Zheng, Cleaven Chia, Amirhassan Shams-Ansari, Cheng Wang, Mian Zhang, Keji Lai, and Marko Lončar, "Microwave-to-optical conversion using lithium niobate thin-film acoustic resonators," Optica 6, 1498-1505 (2019); doi: 10.1364/optica.6.001498
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100752
Deposited By: Tony Diaz
Deposited On:16 Jan 2020 17:28
Last Modified:16 Jan 2020 17:28

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