Miles Padgett: Optical tweezers and twisted beams of light
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- čas přidán 9. 09. 2024
- Harnessing orbital angular momentum promises to enhance light's ability to carry information.
spie.org/pw SPIE Photonics West - the biggest photonics conference and exhibition in North America
Miles Padgett is Professor of Optics in the Department of Physics and Astronomy at the University of Glasgow. He heads a 15-person team covering a wide spectrum from blue-sky research to applied commercial development, with funding from government and industry.
Padgett is recognized for his studies in the field of optics and in particular of optical angular momentum. His contributions include an optical spanner for spinning micron-sized cells, use of orbital angular momentum to increase the data capacity of communication systems and an angular form of the quantum Einstein-Podolsky-Rosen (EPR) paradox.
In 2001 Padgett was elected to Fellowship of the Royal Society of Edinburgh. In 2007/8 he was a Leverhulme Trust, Royal Society Senior Research Fellow. From 2009 he has held a Royal Society/Wolfson Merit Award. In 2011 he was appointed to the Kelvin Chair of Natural Philosophy and became a Fellow of the Optical Society. In 2009 Padgett was awarded the Institute of Physics, Young Medal "for pioneering work on optical angular momentum." In 2008 Padgett was awarded the UK Institute of Physics, Optics and Photonics Division Prize for a "distinguished record of achievement in research that spans fundamental aspects of optical angular momentum and applied optical sensors."
Wonderful . ! I learned something new today!! Thank you !.
This guy is so articulate AND smart - wow.
Thank for a beautiful explanation to a complex phenomenon - light!
Mr. Padgett will be presenting more on his work during a plenary presentation at this year's Photonics West.
Beautiful !
what a fentastic idea sir .
Thank you for the video, very informative!!
Opitical vortices are solitons! Those solitons can form loops and knots! Fantastic...reality meets up with imagination!
Nice, I would love to study this concept.
does that mean you could put a twist on laser light to make it more accurate, somewhat like a rifle bullet?
would the lightbeam trajectory curve like a rifle bullet over longer distances as well?
Dejawolfs The answer to both of your questions is no.
Twisted light has a dark hole on its axis. regular light is more "focused".
Great love from Pakistan ❤️❤️❤️
some holographic patterns that could help in your work and in the comprehension of the orbital angular momentum of light:
ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6755504
Hold on, photons have no mass, hence no momentum. Optical tweezers are in fact a "trick" based on the same principle as photocopiers and laser printers. Laser light induces electrostatic charges in the microscope glass "SLIDE" which attracts nanoparticles, cells, dna strands, etc. What's important is the laser technique to achieve that, and it must be acknowledged.
The "rest mass" of a photon is zero. But as the photon always moves, every one carries a momentum.
@@SergiuszPatela Light carries energy. What's the equation for a momentum of an entity without mass?
@@jlfqam in relativity we have this general equation for the energy: E^2: P^2C^2 + m^2C^4. So, if we have a massless particle, we only have E^2=P^2C^2, P is the particle's momentum and photons carries a well difined energy (E=hf), so in the end, a f frecuency photon carries a momentum P=(hf/c).
Thanks
Light's momentum is what a solar sail takes advantage of (a proven technology). And it's what Breakthrough Starshot is relying upon to get to Alpha Centauri. breakthroughinitiatives.org/initiative/3