Ultra-thin metasurface chip turns IR into visible beam-steering systems for LiDAR, quantum light generation, and optical computing

https://www.eurekalert.org/news-releases/1114950

"no moving parts, chip patterned with nanostructures, achieves 3rd-harmonic generation nonlinear light converts telecommunications band 1530 nm IR into 510 nm green light... overcomes pixel-level control (high flexibility, low efficiency)/ collective resonance (high efficiency, low control) efficiency tradeoff... quasi–bound state in the continuum traps/ amplifies light across entire surface, maintaining precise control... 100X more efficient... steered by changing incoming laser polarization... faster fiber-optics"