An Introduction to Optical Vortices and Topological Fluids of Light
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- เผยแพร่เมื่อ 8 ต.ค. 2024
- Hydrodynamic whirlpools have fascinated scientists for centuries, seeking to understand their individual structure, stability, and the ways in which they interact with one another. Who hasn’t marveled at tornadoes or watched as soap bubbles get sucked into the vortex of a bathtub drain? To reduce ideas to their essence, such fluid vortices are often considered in a two-dimensional setting where they amount to current swirling around a singularity. These, in turn, bear a striking resemblance to cross-sections of optical vortices that can be created with lasers, but with the propagation axis now treated as time. The vortex center is a then a dark spot about which the phase of light rotates like a barber shop sign. Such engineered light can therefore be interpreted as a two-dimensional, compressible fluid, and the vortices it harbors exhibit all sorts of odd and potentially useful behavior. For instance, optical vortices can attract, repel, scatter, and even annihilate one another. Even more intriguing, these two-dimensional topological objects have a lot in common with the macroscopic quantum states of Bose-Einstein condensates and fractional quantum Hall systems. Pairs can even be used in Bell tests to demonstrate lack of local realism. This motivates a serious consideration of optical vortices as quantum objects that might be harnessed in emerging quantum information technologies. With these deeper issues in mind, our colloquium lecture is intended to serve as an introduction to optical vortices and their classical few-body dynamics. We tag-team an experimentalist and a theorist to provide a fuller perspective of what makes this form of light so interesting.
Great explanation of this phenomenon. Excellent teamwork between skilled a theorist and equally talented experimental scientist. Transcendence
That is a wild presentation title, I had to share it with some friends 😁.
This is so insightful!!! Amazing
Thanks a lot for this video
what the how did my autoplay end up in here
I just wish I could understand all of this
SAME the algorithm is broken! rofl
Haha, same boat. Still interesting but way over my head
Hi
& thanks for this video
I have tried to understand the vortex of light only since the advent of the James Webb Telescope, in order to understand the coronagraph, which enables weak-luminous stars and planets to be shown after blocking the strong light of their stars.
But now I'm starting to think that :
the vortex of light
=
electromagnetic wave with rotating polarization
?? Is this what really happens?
Hello. The circularly polarisation of light is related to the spin of photons, it is an intrinsic rotation. Even a "classical" plane wave has this kind of rotation. The vortex beam has a second kind of rotation that is related to orbital momentum. You can make an analogy with the rotation of Earth. The Earth turn around the sun (orbital momentum) and it also turn around itself (spin). In other words, light turn around itself and it is its polarisation. But in the case of vortex beam, it also turns around a point.
@@juliendechanxhe6060
👍👍👍 This is a comprehensive, brief explanation that is new to me.
Please If you have a link to a video or page for the matter, it would be very kind of you to post it here.
Whatever remains, I have to research to understand how to obtain this effect to achieve vortex, and understand how masks with sub-wave networks or grating, can cause the rotation that you explained, and how we are able to block the bright light (starlight) and allow the dim light of distant planets🙏🙏
Its all clear now.
34:40
😧
sir what do you mean
nice
This research is literally mind blowing. Phenomenal, exceptional, astounding, breathtaking, so next level in terms of *where we are going.* I really find the grids as a means to influence light to *scientifically* produce precise vortices to have limitless potential. Thanks to everyone involved in this, I'm looking forward to finding out more about this subject as this is my first exposure.
This might sound a bit ridiculous, but just a week or two ago Dr. Scott Stripling held a press conference for a discovery of what is called a Curse Tablet that had on it the earliest known writing of the name of God: th-cam.com/video/VDD92qp_lfQ/w-d-xo.html Would it be completely absurd and outside of any realm of possibility for this symbol, when used in a like manner as the grids, to influence the light in a functional manner?
This is a good way to make electric charges and magnetic field forces out of these vortices in a vacuum.
why is this in my recommended
ngl I'm failing