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Next Physics Colloquium Event: October 24th, presented by Prof. Dave Phillips (University of Exeter)

Headshot of Dave Phillips

Prof. Dave Phillips

11 October 2022

An invitation to attend the next event in our Physics Colloquium series.

Venue: 3.21 Berry Lecture Theatre, HH Wills Physics Labs Building, Tyndall Ave, 3pm

We would like to invite you to attend the Physics Colloquium, which will be held at 3pm on Mondays in 3.21, the Berry Lecture Theatre. The colloquia will be followed by tea and coffee in the staff coffee room. We hope to see you there!

The most imminent event in the series, on the 24th of October, will be presented by Prof. Dave Phillips from the University of Exeter. Click here for a PDF of the abstract: David Phillips Colloquium (PDF, 515kB)

Title: Rendering the opaque transparent

Abstract:

The scattering of light was long thought to be an insurmountable barrier preventing imaging through opaque materials. However, in the last decade or so, a series of pioneering studies showed that it was possible to use a technique called wavefront shaping [1] to characterise and subsequently cancel out complicated scattering effects [2]. Therefore, light that has undergone multiple scattering can be unscrambled to see through opaque media, such as frosted glass, biological tissue, or multimode optical fibres [3]. However, there several major challenges to overcome before wavefront shaping technology can be translated from the laboratory to ‘real-world’ settings. In this colloquium, I will give an introduction to this research area, and outline some of the approaches being developed in my group to tackle outstanding challenges [3-6]. I hope to give a broad perspective on the future of this bright emerging field.

Further information

[1] Ivo M. Vellekoop & Allard P. Mosk. "Focusing coherent light through opaque strongly scattering media." Optics letters 32.16: 2309-2311 (2007).

[2] Sylvain Gigan, et al. "Roadmap on Wavefront Shaping and deep imaging in complex media." Journal of Physics: Photonics 4 (4), 042501(2022).

[3] Daan Stellinga, et al. "Time-of-flight 3D imaging through multimode optical fibers." Science 374.6573: 1395-1399 (2021).
[4] Shuhui Li, et al. "Memory effect assisted imaging through multimode optical fibres." Nature Communications 12.1: 1-13 (2021).

[5] Shuhui Li, et al. "Compressively sampling the optical transmission matrix of a multimode fibre." Light: Science & Applications 10.1: 1-15 (2021).

[6] Unė G. Būtaitė, et al. "How to build the optical inverse of a multimode fibre." arXiv preprint arXiv:2204.02865 (2022).

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