Nonlinear photonic chip generates >1 mW UV with a 6.4X higher saturation threshold enabling high power without breaking down

https://phys.org/news/2026-04-photonic-chip-generates-milliwatt-uv.html

"previously limited to µW-range, tend to degrade materials/ lose efficiency quickly... overcome using lithium niobate photonic crystal resonate microcavity, sandwiched between reflectors trapping/ amplifying light efficiently... portable spectroscopy, quantum computers requiring specific UV to manipulate certain types of qubits (like trapped ions or diamond-based sensors), optical clocks... primarily UV-A spectrum (reaching record-breaking 355 nm), ~197%/W/cm² efficient (2nd harmonic generation)"