Shields, T., Dada, A. C. , Hirsch, L., Yoon, S., Weaver, J. M. R., Faccio, D. , Caspani, L., Peccianti, M. and Clerici, M. (2022) Electro-optical sampling of single-cycle Thz fields with single-photon detectors. Sensors, 22(23), 9432. (doi: 10.3390/s22239432)
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Abstract
Electro-optical sampling of Terahertz fields with ultrashort pulsed probes is a well-established approach for directly measuring the electric field of THz radiation. This technique usually relies on balanced detection to record the optical phase shift brought by THz-induced birefringence. The sensitivity of electro-optical sampling is, therefore, limited by the shot noise of the probe pulse, and improvements could be achieved using quantum metrology approaches using, e.g., NOON states for Heisenberg-limited phase estimation. We report on our experiments on THz electro-optical sampling using single-photon detectors and a weak squeezed vacuum field as the optical probe. Our approach achieves field sensitivity limited by the probe state statistical properties using phase-locked single-photon detectors and paves the way for further studies targeting quantum-enhanced THz sensing.
| Item Type: | Articles |
|---|---|
| Additional Information: | Funding: M.C. and A.C.D. acknowledge the support from the UK Research and Innovation (UKRI) and the UK Engineering and Physical Sciences Research Council (EPSRC) (Fellowship “In-Tempo” EP/S001573/1). MC and LH acknowledge the support from the Defence Science and Technology Laboratory (DSTL), DSTLX-1000144632. M.C., S.Y., L.C. acknowledge the support from Innovate UK, Application Number PN 10001572 (HiQuED). LC acknowledges financial support from the UK Engineering and Physical Sciences Research Council (grant EP/V062492/1). DF acknowledges financial support from the Royal Academy of Engineering Chairs in Emerging Technology Scheme and from the UK Engineering and Physical Sciences Research Council (grants EP/M01326X/1 and EP/R030081/1). This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme Grant agreement No. 725046. |
| Status: | Published |
| Refereed: | No |
| Glasgow Author(s) Enlighten ID: | Faccio, Professor Daniele and Yoon, Mr Seungjin and Clerici, Professor Matteo and Shields, Mr Taylor and Weaver, Professor Jonathan and Hirsch, Mr Lennart and Dada, Dr Adetunmise |
| Authors: | Shields, T., Dada, A. C., Hirsch, L., Yoon, S., Weaver, J. M. R., Faccio, D., Caspani, L., Peccianti, M., and Clerici, M. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering College of Science and Engineering > School of Engineering College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Sensors |
| Publisher: | MDPI |
| ISSN: | 1424-8220 |
| ISSN (Online): | 1424-8220 |
| Published Online: | 02 December 2022 |
| Copyright Holders: | Copyright © 2022 by the authors |
| First Published: | First published in Sensors 22(23): 9432 |
| Publisher Policy: | Reproduced under a Creative Commons License |
| Data DOI: | 10.48550/arXiv.2208.02103 |
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