Hierarchical plasmonic metamaterials for photodetection and antidetection

Plasmonic metamaterials have garnered intensive interests in the past decades due to the powerful capability of optical spectral manipulation as well as the extreme optical field confinement. More excitingly, the hierarchical metamaterials built with plasmonic meta-atoms have evidenced tremendous advances in broadband light harvesting, in operando photodetection as well as information antidetection, etc. In this talk, I will overview the recent progresses in my group at Nanjing University on a couple hierarchical metamaterials assembled by plasmonic nanoparticles, based on which we have enabled the broadband absorbers for in-situ chemical detection, multiscale sensitive detection of micro-nanoplastic pollutants as well as multispectral optical camouflage. Our results may shed light on the precise optical spectral manipulation based on random plasmonic structures for optical functionalized devices.