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Reposted by Orad Reshef

gravity-levity.bsky.social @gravity-levity.bsky.social · Sep 8

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

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Orad Reshef @oradr.bsky.social · 27d

Ohhh I didn’t know he died! What an awesome guy

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Orad Reshef @oradr.bsky.social · Jan 29

Hello hello Anya! Welcome!!

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Reposted by Orad Reshef

SPIE @spie.org · Jan 9

🏆 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

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Orad Reshef @oradr.bsky.social · Jan 3

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".

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Orad Reshef @oradr.bsky.social · Dec 18

TIL that the no-hair theorem actually hasn't been fully proven quite yet. It has in some limited cases, and even in the case of gravity without electromagnetism, it has only been partially resolved.

en.wikipedia.org/wiki/No-hair...

No-hair theorem - Wikipedia

en.wikipedia.org

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Orad Reshef @oradr.bsky.social · Dec 18

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Orad Reshef @oradr.bsky.social · Dec 17

Does a publication in PRL count as evidence of being a physicist? 😁 journals.aps.org/prl/abstract...

Relaxed Phase-Matching Constraints in Zero-Index Waveguides

Experiments in Dirac-cone metamaterials present the first observation of direction-independent phase matching in a medium where phase matching is relevant for parametric nonlinear optical processes.

journals.aps.org

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Orad Reshef @oradr.bsky.social · Dec 15

Still not very, but there’s tons of remote opportunities these days!

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Orad Reshef @oradr.bsky.social · Dec 12

Haven’t mentioned it publicly, but I’m looking for my next job!

Please reach out if you hear of any interesting opportunities. You can learn more about who I am and what I can do at my portfolio site:

reshef.ca

Orad Reshef | Nanophotonics, metamaterials and nonlinear optics reshef.ca – Orad Reshef | Nanophotonics, metamaterials and nonlinear optics

reshef.ca

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Orad Reshef @oradr.bsky.social · Dec 7

Yea this last one is really a thing. I think a lot of those AI photonics startups pivoted exactly this way.

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Orad Reshef @oradr.bsky.social · Dec 7

You really couldn’t get away with that. VCs ask too many questions, you’d effectively be working on 2 companies simultaneously

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Orad Reshef @oradr.bsky.social · Dec 4

Seems cool, looking forward to reading it more closely

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Reposted by Orad Reshef

Andreas Mischok @andreasphysics.bsky.social · Dec 4

#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

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Orad Reshef @oradr.bsky.social · Dec 4

I direct you to @drarmani.bsky.social’s advice section on her old research site:

armani.usc.edu/advice/

Advice for applying to (and succeeding in) PhD programs and Faculty positions – Armani Research Lab

armani.usc.edu

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Orad Reshef @oradr.bsky.social · Dec 4

A great video on extreme nonlinear optics and the GZK limit (?), featured on the xkcd youtube channel.

What if we shined collimated gamma ray bursts on to the moon?

www.youtube.com/watch?v=jgaf...

But what if we tried MORE power?

YouTube video by xkcd's What If?

www.youtube.com

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Reposted by Orad Reshef

Mikhail Kats @mickeykats.bsky.social · Dec 2

Frequency conversion using approaches different from conventional nonlinearities opens the door to working with low-intensity incoherent light, perhaps eventually as slow as nightglow at night

Fun and rewarding collaboration between UW-Madison, Stanford, and Argonne arxiv.org/abs/2411.18707

Title and author block

All-passive upconversion imaging of incoherent near-infrared light at intensities down to 50 nW/cm2

Rabeeya Hamid1, Demeng Feng1, Pournima Narayanan2, Justin S. Edwards3, Manchen Hu4, Emma Belliveau4, Minjeong Kim1, Sanket Deshpande1, Chenghao Wan4, Linda Pucurimay5, David A. Czaplewski6, Daniel N. Congreve4, Mikhail A. Kats1,3*
1Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, 53706, USA
2Department of Chemistry, Stanford University, Stanford, CA 94305, USA
3Department of Physics, University of Wisconsin-Madison, Madison, 53706, USA
4Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA
5Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
6Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA

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Orad Reshef @oradr.bsky.social · Dec 2

a man in a blue shirt and tie says well he has a point in front of him

ALT: a man in a blue shirt and tie says well he has a point in front of him

media.tenor.com

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Orad Reshef @oradr.bsky.social · Dec 1

Mindblowing that we invented this word, and now it's part of the sum of human knowledge 💡

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Orad Reshef @oradr.bsky.social · Nov 30

Welcome Alex 👋

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Reposted by Orad Reshef

John Dudley @johnmdudley.bsky.social · Nov 30

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.

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Reposted by Orad Reshef

Vera Marie Titze @veratitze.bsky.social · Nov 27

On the bright side, you will instantly see when it’s broken…

Shining a red laser through a broken optical fibre, resulting in a very obvious loss of guided light at the broken position

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Orad Reshef @oradr.bsky.social · Nov 28

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)_/¯

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Reposted by Orad Reshef

Dr Dan Jones @hookean.bsky.social · Nov 23

This clip is mindblowing. What we used to do to simulate things before modern computers!
#ITeachPhysics 🎢

youtu.be/foB9vjgdDjs?...

The Ideal Gas Law

YouTube video by Archive UK tv

youtu.be

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Reposted by Orad Reshef

Davide De Biasio @davidedebiasio.bsky.social · Nov 22

Scientists, when do we start lobbying for #Bluesky to implement native LaTeX support?

#science #physics #mathematics

🧪⚛️

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