At the forefront of nonlinear optical materials research, photon avalanche (PA), a unique luminescence mechanism occurring in lanthanide-ion-doped systems, exhibits exponential response under continuous laser pumping through an energy positive feedback loop mechanism, thus demonstrating ultra-high-order nonlinear optical behavior far exceeding traditional upconversion processes.

2025-06-05

Ji Xingchen/Su Yikai LPR | 780 nm on-chip integrated high-Q ultra-wideband Fabry-Perot cavity

With the rapid development of applications such as quantum precision measurement, atom manipulation, and narrow linewidth lasers, higher and higher demands are placed on high-performance photonic devices operating in the visible and near-visible wavelength range (especially the 780 nm wavelength corresponding to the rubidium atomic transition).

2025-06-23

Binary optics and metasurface lenses

Bichromatic optics is a subject or an optical technology; the concept of a meta-lens is more inclined to be a device.

2025-06-23

Achromatic diffractive waveguide in AR glasses

AR glasses seem to have developed rapidly in recent years; many believe this is the device most likely to replace mobile phones in the future.

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