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Orad Reshef

@oradr.bsky.social
709 followers 328 following 176 posts

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

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Orad Reshef @oradr.bsky.social · 23/04/2026
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...
nature.com
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.
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gravity-levity.bsky.social @gravity-levity.bsky.social · 08/09/2025
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...
news.mit.edu
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...
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SPIE @spie.org · 09/01/2025
🏆 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...
spie.org
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
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Orad Reshef @oradr.bsky.social · 03/01/2025
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 · 18/12/2024
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...
en.wikipedia.org
No-hair theorem - Wikipedia
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Orad Reshef @oradr.bsky.social · 12/12/2024
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
reshef.ca
Orad Reshef | Nanophotonics, metamaterials and nonlinear optics reshef.ca – Orad Reshef | Nanophotonics, metamaterials and nonlinear optics
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Andreas Mischok @andreasphysics.bsky.social · 04/12/2024
#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
rdcu.be
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...
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Orad Reshef @oradr.bsky.social · 04/12/2024
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...
youtube.com
But what if we tried MORE power?
YouTube video by xkcd's What If?
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Mikhail Kats @mickeykats.bsky.social · 02/12/2024
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 · 01/12/2024
Mindblowing that we invented this word, and now it's part of the sum of human knowledge 💡
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John Dudley @johnmdudley.bsky.social · 30/11/2024
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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Vera Marie Titze @veratitze.bsky.social · 27/11/2024
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 · 28/11/2024
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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Dr Dan Jones @hookean.bsky.social · 23/11/2024
This clip is mindblowing. What we used to do to simulate things before modern computers! #ITeachPhysics 🎢 youtu.be/foB9vjgdDjs?...
youtu.be
The Ideal Gas Law
YouTube video by Archive UK tv
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Davide De Biasio @davidedebiasio.bsky.social · 22/11/2024
Scientists, when do we start lobbying for #Bluesky to implement native LaTeX support? #science #physics #mathematics 🧪⚛️
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Rachel Grange @rachelgrange.bsky.social · 21/11/2024
The founders of the Photonic Online Meeting #POM since 2019 are reunited on 🦋 @mickeykats.bsky.social @drarmani.bsky.social @riccard0.bsky.social @sylvaingigan.bsky.social @oradr.bsky.social and last but not least @igordownunder.bsky.social 💡Hello everyone! 📍https://photonicsonlinemeetup.org/
https://photonicsonlinemeetup.org/
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Orad Reshef @oradr.bsky.social · 19/11/2024
lol wut? I thought threads was enormous
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Mikhail Kats @mickeykats.bsky.social · 17/11/2024
There it is: TYPES OF PHOTONICS PAPER (2021). What deserves to be added from the last 3 years?
TYPES OF PHOTONICS PAPER

* META SOMETHING
* THE RADIO ENGINEERS DID IT IN 1910 BUT NOW WE HAVE NANOFAB
* CONCEPT FROM AN OLD SOVIET PAPER NO ONE BOTHERED TO TRANSLATE
* THEY PYT A SMALL TIP RIGHT NEXT TO WHAT?!
* OUR Q FACTOR IS BIGGER THAN YOUR Q FACTOR
* THESE PLANE WAVES ADDED UP MAKE AN INTERESTING SHAPE
* SOUNDS QUANTUM-Y BUT IS ACTUALLY PURELY CLASSICAL
* YET ANOTHER WEIRD SOLUTION TO MAXWELL'S EQUATIONS
OPTICS, BUT NOW WITH MACHINE LEARNING
* COMPLEX SOLID-STATE PHENOMENON EMULATED WITH OPTICS, FOR SOME REASON
* LIGHT CAN BE FAST, OR SLOW, WHATEVER
* *puts pinky to mouth* ... LASERS
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Jeff Lundeen @lundeen.bsky.social · 16/11/2024
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
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Laser Focus World magazine @laserfocusworld.bsky.social · 15/11/2024
Hello Bluesky optics/photonics/quantum people! We've packed up and moved on over here. Next week we'll start sharing our articles here. Happy weekend!
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Orad Reshef @oradr.bsky.social · 14/11/2024
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!
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Prof. Andrea Armani @drarmani.bsky.social · 14/11/2024
So, I haven't seen any of the video and maybe I was completely cut... But the first episode is tonight! The topics are amazing! 💡🧪 www.pbs.org/wgbh/nova/se...
pbs.org
Building Stuff
Humans are the most innovative species on Earth. See how engineers are supercharging our abilities, reaching beyond our horizons, and altering our environment.
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Orad Reshef @oradr.bsky.social · 13/11/2024
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
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Under the Microscope @underthemicroscope.bsky.social · 13/11/2024
Remember the #nanohole array from yesterday? Well sometimes, #nanoholes are a first step into creating #nanopillars using a classic #nanofabrication trick, image conversation.
A scanning electron microscope image of a nanopillar array.
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John Dudley @johnmdudley.bsky.social · 12/11/2024
I photographed a laser in a dusty room ...
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Orad Reshef @oradr.bsky.social · 11/11/2024
It’s so hard not to be cynical
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Orad Reshef @oradr.bsky.social · 10/11/2024
💡Posted on Reddit today, the “Brocken Spectre”. Supposedly it’s a type of “Glory”: en.wikipedia.org/wiki/Glory_(...
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Rachel Grange @rachelgrange.bsky.social · 10/11/2024
Back for a little while here, I tried this ‘starter pack’ for photonics & optics people: anyone else can follow up to 50 people at the click of a button: go.bsky.app/QrtPj7R. Put your name below and I will add you to the pack.
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Orad Reshef @oradr.bsky.social · 28/10/2024
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
arxiv.org
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...
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Kresten Lindorff-Larsen @lindorfflarsen.bsky.social · 27/10/2024
Fourier transform of Google Trends of Fourier transform 🧪
Left plot shows the Google trends of the term "Fourier transform". The right plot shows the Fourier transform of the google trends with peaks at 6 and 12 months
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Orad Reshef @oradr.bsky.social · 28/10/2024
One day, when this chapter of my life is over, I’m going to write a KILLER book on the differences between doing research for academia vs industry. Their incentives are virtually there opposites of each other
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Jacopo Bertolotti @jacopobertolotti.com · 17/10/2024
Apparently there is a big influx of new people, so I used the (very clunky) system bsky has to create starter packs and created one for Physics (excluding Astrophysics, as someone else made a list for that). It is obviously incomplete, but it is a starting point go.bsky.app/CH3YDz7
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Orad Reshef @oradr.bsky.social · 27/10/2024
My phone is blowing up with new follows today. What’s the story? Welcome! I’ll use the platform more if you do…
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Matias Koivurova @mkoivurova.bsky.social · 17/10/2024
Since I've got a some new followers, I think it's tome to dust off the good ol' wood laser video. Yup, you got that right. A laser made out of wood! Fr, fr, no joke 👇👇💡🧪 youtu.be/z7Nj1_EQQu0?...
youtu.be
Quick and dirty wood laser
YouTube video by Partially Coherent
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Mikhail Kats @mickeykats.bsky.social · 17/02/2024
Here are the keywords that the Bluesky photonics feed picks up at present: To join pin the photonics feed, go here: bsky.app/profile/did:... To get added as a poster, send a post to me [or you can email]
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Mikhail Kats @mickeykats.bsky.social · 18/01/2024
This belongs in the photonics feed 💡
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Orad Reshef @oradr.bsky.social · 30/12/2023
Cool to see @ianwilliamson.bsky.social @emilyhaworth.bsky.social and @ferryprins.bsky.social on here!
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Orad Reshef @oradr.bsky.social · 07/12/2023
AI-generated optical illusions. Dear lord some of these are trippy dangeng.github.io/visual_anagr...
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Jacopo Bertolotti @jacopobertolotti.com · 22/11/2023
#PostdocJobs If you are interested (or know anyone who might be) to work with me on optical computing, and have experience with fs lasers, take a look at jobs.exeter.ac.uk/hrpr_webrecr... (and contact me!) #Optics #Physics
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Orad Reshef @oradr.bsky.social · 17/11/2023
Goldphene? arxiv.org/pdf/2311.078...
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Orad Reshef @oradr.bsky.social · 17/11/2023
Welcome to photonics bluesky @nicolomaccaferri.bsky.social !
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Optica @optica.org · 14/11/2023
Hello Bluesky! 👋 We’re Optica, the society advancing optics and photonics worldwide. We’re excited to share the latest research, technology and updates in light science! 💡
A black square with purple waves. Text reads "Wave hello to Optica."
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Orad Reshef @oradr.bsky.social · 13/11/2023
Welcome to photonics bluesky @holswright.bsky.social !
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Orad Reshef @oradr.bsky.social · 13/11/2023
Welcome to photonics bluesky @isandall.bsky.social !
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Orad Reshef @oradr.bsky.social · 02/11/2023
Seems like @opticapubsgroup.bsky.social and @opnmagazine.bsky.social just got here too. Welcome! 💡
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Carsten Rockstuhl @crockstuhl.bsky.social · 30/10/2023
Welcome to #photonics Bluesky @acalalesina.bsky.social !💡
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Lightsmith @slepkov.bsky.social · 28/10/2023
So many misconceptions about putting metal in the microwave oven. Yes, you can leave the metal spoon in your tea/coffee/soup/stew. No, it won't spark or burn you! In fact, the metal won't absorb any microwaves. [Pic is before & after, 45s on high. Temp scale on right is useful.] #iteachphysics 💡🧪
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Orad Reshef @oradr.bsky.social · 27/10/2023
It's been another week, y'all probably have a whole bunch of new codes. Please contribute! Also if you have photonics friends who wanna join have them contact me or Mikhail!
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Anna Hughes 🍁 @annaghughes.bsky.social · 25/10/2023
Hey there Bluesky! I'm a former astrophysicist working in the data science & ml space, and I've been hoping to make the switch to climate work. Does anybody know of any open remote or 🇨🇦 roles that might be relevant? Thank you!!
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Prof. Andrea Armani @drarmani.bsky.social · 25/10/2023
Photonics Online Meetup (POM23) is a little over a wk away! Don't forget to register (for free!) to join on Gathertown for live streaming, posters, & more. Optica student chapters: apply for funding to support a Hub! #OpenAccess #free #SciSky #Acadsky photonicsonlinemeetup.org/registration/ 🧪 💡
Flyer about POM: no fees for registration
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