Changing the color of quantum light on an integrated chip

https://phys.org/news/2022-12-quantum-chip.html

"thin-film lithium niobate... record-high terahertz frequency shifts of single photons... magnifying glass bends light in time instead of space to change spectral shape of photon from fat to skinny... compact and energy-efficient... integrated with wide range of classical and quantum devices... control the frequency and bandwidth of quantum emitters for applications in quantum networks"

Related: New strategy uses ionic liquids to change laser colors with ease
https://phys.org/news/2023-01-strategy-ionic-liquids-laser-ease.html