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Electro-optical sampling of single-cycle THz fields with single-photon detectors

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posted on 2022-12-08, 12:03 authored by Taylor Shields, Adetunmise C Dada, Lennart Hirsch, Seungjin Yoon, Jonathan MR Weaver, Daniele Faccio, Lucia Caspani, Marco PecciantiMarco Peccianti, Matteo Clerici
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

Funding

Infrared time-domain quantum optics (In-tempo)

Engineering and Physical Sciences Research Council

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Defence Science and Technology Laboratory (DSTL), DSTLX-1000144632

Innovate UK, PN 10001572

Integrated Quantum Frequency Combs for Cluster States Generation

Engineering and Physical Sciences Research Council

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Royal Academy of Engineering Chairs in Emerging Technology Scheme

UK Quantum Technology Hub in Quantum Enhanced Imaging

Engineering and Physical Sciences Research Council

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Nano-scale imaging with Hong-Ou-Mandel Interferometry

Engineering and Physical Sciences Research Council

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Time-Resolved Nonlinear Ghost Imaging

European Research Council

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History

School

  • Science

Department

  • Physics

Published in

Sensors

Volume

22

Issue

23

Publisher

MDPI

Version

  • VoR (Version of Record)

Rights holder

© The authors

Publisher statement

This article is an Open Access article published by MDPI and distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

Acceptance date

2022-11-29

Publication date

2022-12-02

Copyright date

2022

ISSN

1424-8220

Language

  • en

Depositor

Prof Marco Peccianti. Deposit date: 6 December 2022

Article number

9432

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