Abstract
Mie-type optical resonators are applicable to all-optical modulation. In article number 2300102, Hao-Yu Cheng, Kung-Hsuan Lin, Kuo-Ping Chen, and co-workers demonstrate both theoretically and experimentally that modulation depth is enhanced by two orders of magnitude in Huygens' metasurface absorber where electric dipole lattice resonance matches the magnetic dipole resonance. Within picosecond scale delay after ultrafast photoexcitation and a few square micrometer spatial confinement, over 100% photothermal modulation depth is experimentally achieved in Huygens' metasurface absorber based on amorphous silicon.
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