.....ping
Posted on 10/09/2021 7:43:19 PM PDT by BenLurkin
For one of the first times, topological photons—light—has been combined with lattice vibrations, also known as phonons, to manipulate their propagation in a robust and controllable way.
"We coupled helical photons with lattice vibrations in hexagonal boron nitride, creating a new hybrid matter referred to as phonon-polaritons," said Alexander Khanikaev, lead author and physicist with affiliation in CCNY's Grove School of Engineering. "It is half light and half vibrations. Since infrared light and lattice vibrations are associated with heat, we created new channels for propagation of light and heat together. Typically, lattice vibrations are very hard to control, and guiding them around defects and sharp corners was impossible before."
The new methodology can also implement directional radiative heat transfer, a form of energy transfer during which heat is dissipated through electromagnetic waves.
"We can create channels of arbitrary shape for this form of hybrid light and matter excitations to be guided along within a two-dimensional material we created," added Dr. Sriram Guddala, postdoctoral researcher in Prof. Khanikaev's group and the first author of the manuscript. "This method also allows us to switch the direction of propagation of vibrations along these channels, forward or backward, simply by switching polarizations handedness of the incident laser beam. Interestingly, as the phonon-polaritons propagate, the vibrations also rotate along with the electric field. This is an entirely novel way of guiding and rotating lattice vibrations, which also makes them helical."
Entitled "Topological phonon-polariton funneling in midinfrared metasurfaces," the study appears in the journal Science.
(Excerpt) Read more at phys.org ...
.....ping
Proton-phonon???
Are the protons talking?
You got your r’s and h’s mixed up.
I once went out with a girl who had phonon-polaritons.
She could be talking to you and just as sweet and upbeat as you could possibly want. And 30 minutes later she was the polar opposite. Accusatory, hateful, a true horror show.
You had me worried there for a second. Thought you were going to say she was a combo b cup c cup.
Phono means sound.
Phonem is the smallest distinct sounds in a language.
I could have fun with that.
I see, I did get my r’s and h’s mixed up.
Should have been photon-phonon, not proton-phonon.
Did they use Schrodinger’s cat for this?
Now the Climate Change crowd (Global Warming) will want to change direct sunlight into a sound of the Hildabeast screeching.
This is like the resonant sound weapon in the Dune movie.
Wait is this a way for directional heat radiation using light?
Is this the take?
Sounds like something Alexander Graham Bell discovered in the later 1800s. Photo-acoustics. Shine a light on something and get an acoustic wave.
I don’t have enough bandwidth or time to absorb this.
Can you give the cliff notes?
I don’t understand a word of it.
I've had the same experience!
Ain't marriage grand!
But they never came out and said what they can make from thiis.
Peruse later.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.