Time reversed optical waves by arbitrary vector spatiotemporal field generation (General audience)

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"Time reversed optical waves by arbitrary vector spatiotemporal field generation"
Mickael Mounaix, Nicolas K. Fontaine, David T. Neilson, Roland Ryf, Haoshuo Chen, Juan Carlos Alvarado-Zacarias and Joel Carpenter
doi.org/10.1038/s41467-020-19...

[@krytharn]

Superb explanation for the layman (like myself). Well done, great research.

[@thiagopxp]

Amazing achievement! Great job doctors!

[@jayrhaninjanicirbingaytv5802]

Thanks for sharing your video enjoy your time sir

[@tagalugawnifielzkitv9217]

Maraming salamat sa pag bahagi ng videm nyo team lory

[@hotpotpanda4716]

This video explains the motivation clearly! Fancy video!

[@PBeringer]

Always told myself that I'd never put myself through an HDR program unless I found a topic that I was utterly obsessed with ... then I discovered time reversal processing. Haha. Though, my work is in acoustics. Really fantastic looking animations! Is the first based on real FDTD simulation? Turning data into fancy animations is something I wanna get good at.

[@aieienmusic9057]

nice explanation. ganito pala ang time reversal waves.

[@Lavender_1618]

This is actually a very important discovery. Hello REAL holographic technology! Like the badges in star trek discovery, that display a user interface infront of the person. The time reversed light waves, generate the images, and then the lasers pulse out from the badge, highlighting that light, creating the 3d user interface. So cool!!! not to mention medical diagnostic applications like being able to literally see the shapes of organs inside the body in 3d.

[@joelacarpenter]

These kind of waves wouldn't be appropriate for that kind of thing. It's a 3D light blob, but you've also got to remember that it's still flying away at the speed of light, so it's not going to hover in mid-air like Kylo Ren caught it. For 3D display type applications, a more traditional hologram, or something like this (kzbin.info/www/bejne/Z5KkqWWrjMh4hMU) would be more what you're after.

[@emmanueloluga9770]

@@joelacarpenter Thank you for elaborating

[@EntangleIT]

Amazing!

[@Killagear5000]

Well done!

[@71AWadood]

Amazing experiment and explanation. May I ask what software do you use to create the animations?

[@apachon]

Great

[@dreamcatherssupport9665]

Thank you so much share your knowledge you are very good explanation to audience. Team lory acero

[@shiva007freephenix]

Nice videos and metaphors/analogies... Are laser sources necessary or laser of special and useful use of some sort for generating this time reverse optical waves ?

[@joelacarpenter]

You need to start with a light source that is a nice well-defined short pulse in time. The device takes that short pulse and carves it up and redistributes into a 3D light blob representing the time reversed wave. I guess the source doesn’t theoretically have to be a laser, but I can’t think of a non-laser light source that in practice could do the job. If you sent light into the device from a light bulb or an LED or something, light is just constantly flowing in randomly over time, and the device has no way to synchronise and sculpt it into the required shape. Perhaps you could think of it a bit like speed cup stacking if you’ve seen that before... kzbin.info/www/bejne/bmOnf4ynqteertE You start off with a single large stack of cups (the input pulse), and then the device goes through a pre-defined sequence at the femtosecond timescale, to split up the original stack/pulse and redistribute it into the required configuration. If instead, you just randomly strew a bunch of cups on the table and told a speed stacker to do their pre-defined sequence, it’d be a mess. Stacker trying to pick up cups at positions where there are no cups, trying to put cups down and colliding with other cups and collapsing. Doesn’t work. You need a well-defined starting configuration, a pre-defined precise sequence and then the desired well-defined output configuration results.

[@shiva007freephenix]

@@joelacarpenter Thanks for your understandable answer. I love the metaphor/analogy with cup stacking ! :-) If you didn't read this book, you might like it I guess : www.goodreads.com/book/show/7711871-surfaces-and-essences

[@thNinjaNiTikTokSixtyNine-kv9wu]

Wala po akong maintindihan basta naaaliw lang po ako sa mga nakikita ko na design napaka linaw ng tubig sa pool Team Lory Acero Vlog

[@CstriderNNS]

if one uses 2 different frequencies, one slower then we can see and one faster than we can see , once it all comes together it will resonate at a frequency that we can see This is the Beginning of the HOLODECK . I WANT RECOGNITION FOR MY IDEA PLS

[@marshallmcluhan33]

Technology like this will help transmit pornography faster than ever!

[@jneal4154]

The tech has to do with producing holograms, not faster data transmission. So expect your porn in hologram format, but expect it to still need to buffer.

[@joelacarpenter]

As JNeal commented, this is more about the generation of 3D optical beams rather than data transmission. You could sculpt the light beam into a simple 3D shape, which with some imagination could be interpreted as pornographic. However it's important to remember that said shape will not be magically floating in mid-air, it will be flying away from you at the speed of light and have a duration of just tens of picoseconds. If tiny blobs of infrared light a few picoseconds long, flying past you at 299,792,458 metres/second, is what you're into, it's not my place to judge, Godspeed, but I'd expect that to be a niche market for this new technology.

[@jonathoncouchey7151]

Biwwauttill you all hear about the soviet time reversed wave weapons. Oh wait it's not time yet. . . . . .

[@naawakweoseindizhinakaaz2052]

That’s why I’m here I wanna understand

[@jonathoncouchey7151]

@@naawakweoseindizhinakaaz2052 the westn has very limited understanding of how the soviet weapons work, due to an error in electromagnetic calculations, and omission of a complete side of electromagnetics. Look for videos by Thomas Bearden I believe he was a serpent, and had an engineering background, he studied how these work, and is the only place I could find information on them.

[@jonathoncouchey7151]

@@naawakweoseindizhinakaaz2052 basically the weapons are able to cause an explosion almost anywhere, and can cause extreme havoc, changing atoms arrangement, and other things. Search for the Russian woodpecker.

[@naawakweoseindizhinakaaz2052]

@@jonathoncouchey7151 I’ve went down quite a rabbit hole and just as Tesla said, we will see horror beyond our understanding. I’ve found patents with the navy, physicists and more. This tech is there the math shows for it. Dr Ning Li being a pioneer with gravity wave tech and super conductors

[@zer0deaths862]

*GIGGLES IN NIKOLA TESLA*

[@alexvornoffice]

the idea of reversing the sound waves and light (to the initial position) looks fake to me... the waves will continue to move and will not stop at one point, that water example is just stupid - no way in real life phisics works the same as in a video simulation.

[@isthisthecase]

It does though. The technique is called "phase-conjugation" and has been demonstrated in real-life many times.

[@jneal4154]

Yes, of course the wave propogates past that point. They just stopped the animation at that one point in time. The waves generated by the impact with the surface "encodes" the object. Different object shape, different waves produced. The waves' shape, is a function of the shape of the object you tossed in. Instead of tossing an object into the pool, what if you instead generated waves, exactly in reverse of the waves that you produced when you dropped the object? As demonstrated here, the waves propagate and produce the shape that WOULD have produced that pattern of ripples if you had dropped it in. The ripples are a function of the object's shape, so if you create waves that encode the shape of an object that doesn't exist, you will produce the "imprint" of the object, as if it had actually interacted with the surface. You should be super excited about this. They're demonstrating that you can also do the same with optical light, meaning that holograms, like in the movies are probably a lot closer than you might think. 😄