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Orad Reshef

@oradr.bsky.social

🇨🇦 Scientist and Entrepreneur working in #photonics • previously @McGill, @Harvard, @uOttawa • 🏳️‍🌈🏳️‍⚧️ ally

176 Posts708 Follower328 Folgt
Orad Reshef@oradr.bsky.social · 5mo ago

Kind of wild to announce but, I just got another paper published! First experimental demonstration of a spaceplate, with a compression factor of up to 175. Check it out, it’s real!! #photonics www.nature.com/articles/s41...

Experimental demonstration of high space compression by optical spaceplates - Nature Communications

In this work, the authors demonstrate that engineered ‘spaceplates’-devices that replace physical space in optical systems-can achieve free space compression up to 176 × their thickness.

nature.com

@gravity-levity.bsky.social · last yr.

1/ Rainer Weiss, who conceived of the idea of a gravitational wave detector (which eventually became LIGO), has died. I was at MIT when the first gravitational wave detection was announced, and he gave perhaps the most inspiring colloquium I have ever heard. news.mit.edu/2025/profess...

Professor Emeritus Rainer Weiss, influential physicist who forged new paths to understanding the universe, dies at 92

MIT Professor Emeritus Rainer Weiss, a renowned experimental physicist and Nobel laureate whose groundbreaking work on the Laser Interferometer Gravitational-Wave Observatory (LIGO) confirmed a longst...

news.mit.edu

SPIE@spie.org · 2y ago

🏆 SPIE Maria Goeppert Mayer Award in Photonics: Pavel Cheben, NRC Canada, Principal Research Officer For pioneering contributions to silicon photonic waveguide devices, including the invention of metamaterial waveguides + advancing sub-wavelength integrated #photonics tech. spie.org/news/pavel-c...

Pavel Cheben: The 2025 SPIE Maria Goeppert Mayer Award in Photonics

For pioneering contributions to silicon photonic waveguide devices, including the invention of metamaterial waveguides and advancing sub-wavelength integrated photonics technology

spie.org

Orad Reshef@oradr.bsky.social · 2y ago

How can quantum entanglement be instantaneous (so, “faster” than the speed of light) while also not violating causality? John Bell gave a classic analogy: "When the Queen dies in London, the Prince of Wales, lecturing in Australia, becomes instantaneously King".

Andreas Mischok @andreasphysics.bsky.social · 2y ago

#Polaritons enable high performance angle-independent optical filters. Immensely enjoyed this collaboration between @thegatherlab.bsky.social, the Vandewal group at UHasselt and University of St Andrews rdcu.be/d2hUo

Breaking the angular dispersion limit in thin film optics by ultra-strong light-matter coupling

Nature Communications - Thin film interference is integral to modern photonics; however, it inevitably leads to an undesired change of spectral characteristics with angle. Here, the authors...

rdcu.be

TheGatherLab@thegatherlab.bsky.social · 2y ago

📢Just published: Breaking the angular dispersion limit in thin-film optics by ultra-strong light-matter coupling rdcu.be/d2hUo. This may be our most impactful work so far, challenging a fundamental limit that has constrained optical design in the past. @andreasphysics.bsky.social

Ultra-thin, flexible polariton filter that retains its properties for different bending angles.
John Dudley@johnmdudley.bsky.social · 2y ago

At the University of Franche-Comté, some incredible holograms were made in the 1970s. Here is a photo of one with some well-known characters, but have a good look at the right hand photo. Aside from the shadows, what beautiful ray-optics process is being accurately recorded by the hologram?

Hologram taken in the 1970s at the University of Franche-Comté - Zoom of Asterix. Hologram taken in the 1970s at the University of Franche-Comté - porcelain figurines of Asterix and Obelix.
Orad Reshef@oradr.bsky.social · 2y ago

Lots of new people joining Bluesky and following me! I’m happy to follow most of you back… you should at the very least complete your profile and maybe make one post with a general introduction so I know who you are. Most people won’t follow empty accounts back ¯\_(ツ)_/¯

Jeff Lundeen@lundeen.bsky.social · 2y ago

At lunch, we were chuckling over the many scientific papers in which the experimental setup figure, made in 3D rendering software, had a laser that cast a shadow. Light doesn’t cast a shadow of course! … so we made it cast one! Work done at uOttawa along with the Boyd group

Optica@optica.org · 2y ago

Light can cast a shadow: bit.ly/3Z3nSYn It may sound like a riddle, but a research team proved that under certain circumstances, a #laser beam can act like an opaque object to cast a shadow. The effect is visible to the naked eye, with the shadow following the beam without observable delay. 🧪⚛️💡

Orad Reshef@oradr.bsky.social · 2y ago

Congrats to Jeff and all his group members! I remember first discussing this over lunch when I was still at uO. So cool to see they finally succeeded!

Optica@optica.org · 2y ago

Light can cast a shadow: bit.ly/3Z3nSYn It may sound like a riddle, but a research team proved that under certain circumstances, a #laser beam can act like an opaque object to cast a shadow. The effect is visible to the naked eye, with the shadow following the beam without observable delay. 🧪⚛️💡

Orad Reshef@oradr.bsky.social · 2y ago

For those of you who have been around bsky for a while, it’s worth your wild to try the Sky Follower Bridge again. There’s way more people to re-follow from Twitter

Orad Reshef@oradr.bsky.social · 2y ago

This article is a must-read for anyone in photonics. I wish I was given something like this as a first year grad student. It’s in plain English and clearly outlines challenges and opportunities. Published in Nat Rev Physics, sharing the arxiv version here: arxiv.org/abs/2308.00088

The physics of optical computing

There has been a resurgence of interest in optical computing over the past decade, both in academia and in industry, with much of the excitement centered around special-purpose optical computers for n...

arxiv.org