Researchers demonstrate new way to 'squeeze' infrared light

https://phys.org/news/2024-06-infrared.html

"thin-film oxide membranes maintain IR frequency, but compress to 10% of its wavelength (far better than the 97% for bulk crystal), allowing greater resolution... used pulsed laser deposition growing 100-nm thick crystalline membrane of strontium titanate (transition metal perovskite) in vacuum... on silicon oxide surface of silicon substrate, phonon polaritons confine IR... photonics, sensors, thermal management (chips shedding heat converting into IR)... easily integrated with a wide variety of substrates"