Cavity electro-optics in thin-film lithium niobate for efficient microwave-to-optical transduction
Name
optica-7-12-1714.pdf
Description
Published version
Size
8.98 MB
Format
Adobe PDF
Checksum (MD5)
ac2c509927427e70fa0fc8ae4440cef1
Author(s)
Holzgrafe, Jeffrey
Sinclair, Neil
Zhu, Di
Shams-Ansari, Amirhassan
Colangelo, Marco
Hu, Yaowen
Zhang, Mian
Berggren, Karl K
Lončar, Marko
Date Issued
2020
Journal
Optica
Publisher
The Optical Society
Citation
Holzgrafe, Jeffrey, Sinclair, Neil, Zhu, Di, Shams-Ansari, Amirhassan, Colangelo, Marco et al. 2020. "Cavity electro-optics in thin-film lithium niobate for efficient microwave-to-optical transduction." Optica, 7 (12).
Version
Final published version
Abstract
© 2020 Optical Society of America. Linking superconducting quantum devices to optical fibers via microwave-optical quantum transducers may enable large-scale quantum networks. For this application, transducers based on the Pockels electro-optic (EO) effect are promising for their direct conversion mechanism, high bandwidth, and potential for low-noise operation. However, previously demonstrated EO transducers require large optical pump power to overcome weak EO coupling and reach high efficiency. Here, we create an EO transducer in thin-film lithium niobate, a platform that provides low optical loss and strong EO coupling. We demonstrate on-chip transduction efficiencies of up to (2.7 ± 0.3) × 10−5 and (1.9 ± 0.4) × 10−6/µW of optical pump power. The transduction efficiency can be improved by further reducing the microwave resonator’s piezoelectric coupling to acoustic modes, increasing the optical resonator quality factor to previously demonstrated levels, and changing the electrode geometry for enhanced EO coupling. We expect that with further development, EO transducers in thin-film lithium niobate can achieve near-unity efficiency with low optical pump power.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1364/OPTICA.397513
