Reflective Optical Limiters: Ultrathin Broadband Reflective Optical Limiter (Laser Photonics Rev. 15(6)/2021)

The cover illustrates reflective optical limiters that incorporate phase-transition vanadium dioxide into arrays of metallic aperture antennas. As demonstrated by Mikhail A. Kats and co-workers in article number 2100001, these devices have broadband transmittance for low-intensity illumination high reflectance when the incident intensity increases, thus help protect sensitive detectors from high-power illumination. high-intensity state minimizes absorption, increases damage threshold device. [Image credit: X. Zou]