Smallest/ smoothest curved mirrors for high-performance optical resonators (cavities) used in quantum computing/ networking

https://phys.org/news/2026-02-microscopic-mirrors-future-quantum-networks.html

"thermal oxidation on silicon wafer flattens surface irregularities at atomic level, dielectric coating deposited on smoothed surface, then when underlying silicon etched away built-in mechanical stress causes released coating to buckle into curved high-quality mirror shape suitable as optical cavity... single photon bounces back/ forth nearly 1 million X ensuring strong interactions between photons/ single atoms... quantum networks, modular quantum computing, integrated photonics"