Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Optica Sensing Congress

Towards pulsed high-gain quantum imaging with undetected photons

Jingrui Zhang, Arthur C. Cardoso, Rowan A. Hoggarth, Jinghan Dong, Weijie Nie, Haichen Zhou, John Rarity, Alex S. Clark

Published Jan 1, 2024• 0 citations
Publisher

Abstract

High-gain nonlinear interferometry (NLI) is useful for measuring small mid-infrared transmission changes in lossy samples by detecting near-infrared light. We experimentally reach a parametric down-conversion gain of ~ 3 and will present progress towards NLI imaging.
DOI
10.1364/qsm.2024.qth1g.4

Related papers

Enhancing Nonlinear Interferometers for Imaging with Undetected Photons: Seeding and High-Gain

Emma J. Pearce, Jefferson Flórez, Nathan R. Gemmell +9 more

Infrared (IR) imaging and spectroscopy is invaluable to many disciplines for its ability to probe molecular responses, from material analysis to diagnostic medicine. However, these applications are often limited by inefficient, noisy detectors. Non-degenerate nonlinear interferometers (NLIs) offer an alternative route through a technique known as imaging with undetected photons [1]. For an NLI producing visible-IR photon pairs, a change in the IR due to an object can be observed as a change to the interference of the visible photons. The IR does not need to be detected, bypassing the need for IR detectors completely.

Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)•Jun 26, 2023•0 citations

Fourier-domain low-coherence interferometry with undetected mid-infrared photons in the high-gain regime

Giovanni Zotti, Kazuki Hashimoto, D. B. Horoshko +4 more

We develop a high-parametric-gain SU(1,1) interferometer with an aperiodically-poled KTP crystal and demonstrate Fourier-domain low-coherence interferometry with undetected mid-infrared photons.

•Jan 1, 2025•0 citations

Applied Hyperspectral Mid-IR Imaging with Undetected Photons

Anna V. Romanova, Marlon Placke, Chiara Lindner +5 more

We demonstrate hyperspectral mid-infrared quantum imaging using sensing with undetected photons in a nonlinear interferometer, enabling label-free compositional analysis with visible-light detection. We validate the method on polymers, microplastics, and biological tissue.

•Jan 1, 2026•0 citations

Long-Pass Type Quantum Imaging Interferometer with Undetected Photons in the Infrared Wavelength Range

Bernd Jungbluth, Florian Elsen, Florian Herbst +1 more

We present a parametric down conversion source in periodically poled lithium niobate, its application in a quantum interferometer at 1600 nm and a novel long-pass scheme to extend the operational range further into Mid-IR.

Frontiers in Optics•Jan 1, 2020•0 citations

Microscopy with undetected photons in the mid-infrared

Inna Kviatkovsky, Helen M. Chrzanowski, Ellen G. Avery +2 more

Owing to its capacity for unique (bio)-chemical specificity, microscopy with mid-infrared (IR) illumination holds tremendous promise for a wide range of biomedical and industrial applications. The primary limitation, however, remains detection, with current mid-IR detection technology often marrying inferior technical capabilities with prohibitive costs. Here, we experimentally show how nonlinear interferometry with entangled light can provide a powerful tool for mid-IR microscopy while only requiring near-IR detection with a silicon-based camera. In this proof-of-principle implementation, we demonstrate widefield imaging over a broad wavelength range covering 3.4 to 4.3 μm and demonstrate a spatial resolution of 35 μm for images containing 650 resolved elements. Moreover, we demonstrate that our technique is suitable for acquiring microscopic images of biological tissue samples in the mid-IR. These results form a fresh perspective for potential relevance of quantum imaging techniques in the life sciences.

arXiv:2002.05960•Science Advances•Oct 16, 2020•213 citations

Mid-IR hyperspectral imaging with undetected photons

Marlon Placke, Chiara Lindner, Felix Mann +4 more

By combining a nonlinear interferometer in imaging-mode with Fourier-transform spectroscopy, we realize broadband mid-infrared hyperspectral acquisition with undetected photons. We demonstrate the novel imaging technique on polymer and bio-tissue samples using only near-infrared silicon-based cameras.

Quantum 2.0 Conference and Exhibition•Jan 1, 2024•0 citations
Infrared (IR) imaging and spectroscopy is invaluable to many disciplines for its ability to probe molecular responses, from material analysis to diagnostic medicine. However, these applications are often limited by inefficient, noisy detectors. Non-degenerate nonlinear interferometers (NLIs) offer an alternative route through a technique known as imaging with undetected photons [1]. For an NLI producing visible-IR photon pairs, a change in the IR due to an object can be observed as a change to the interference of the visible photons. The IR does not need to be detected, bypassing the need for IR detectors completely.
Owing to its capacity for unique (bio)-chemical specificity, microscopy with mid-infrared (IR) illumination holds tremendous promise for a wide range of biomedical and industrial applications. The primary limitation, however, remains detection, with current mid-IR detection technology often marrying inferior technical capabilities with prohibitive costs. Here, we experimentally show how nonlinear interferometry with entangled light can provide a powerful tool for mid-IR microscopy while only requiring near-IR detection with a silicon-based camera. In this proof-of-principle implementation, we demonstrate widefield imaging over a broad wavelength range covering 3.4 to 4.3 μm and demonstrate a spatial resolution of 35 μm for images containing 650 resolved elements. Moreover, we demonstrate that our technique is suitable for acquiring microscopic images of biological tissue samples in the mid-IR. These results form a fresh perspective for potential relevance of quantum imaging techniques in the life sciences.