Laser light paired to crystal lattice vibrations enhance nonlinear optical properties of layered 2D material

https://phys.org/news/2023-12-pair-laser-crystal-lattice-vibrations.html

"2D hexagonal boron nitride (hBN) stable at room temperature, vibrate quickly 41 THz, 7.3 μm wavelength... coherently and simultaneously drive phonons and electrons generating new optical frequencies... table-top mid-infrared lasers enabling phonon-mediated nonlinear optics of 4-wave mixing generating light close to even harmonics of optical signal... >30X increased 3rd-harmonic... natural phonon motion with laser driving enhances nonlinear optical effects and generates new frequencies"