摘要
The progress of metaoptics relies on identifying photonic materials and geometries,the combination of which represents a promising approach to complex and desired optical functionalities.Material candidate options are primarily limited by natural availability.Thus,the search for meta-atom geometries,by either forward or inverse means,plays a pivotal role in achieving more sophisticated phenomena.Past efforts mainly focused on building the geometric library of individual meta-atoms and synthesizing various ones into a design.However,those efforts neglected the powerfulness of perturbative metaoptics due to the perception that perturbations are usually regarded as adverse and in need of being suppressed.Here,we report a perturbation-induced countersurveillance strategy using compound nanosieves mediated by structural and thermal perturbations.Private information can be almost perfectly concealed and camouflaged by the induced thermal-spectral drifts,enabling information storage and exchange in a covert way.This perturbative metaoptics can self-indicate whether the hidden information has been attacked during delivery.Our results establish a perturbative paradigm of securing a safer world of information and internet of things.
基金
supported in part by the National Key R&D Program of China(2016YFA0301300)
the Key R&D Program of Guangdong Province(Grant No.2018B030329001)
the National Natural Science Foundation of China(61675237,11761141015,91750207)
the Guangdong Natural Science Funds for Distinguished Young Scholars(2017B030306007)
the Guangdong Special Support Program(2017TQ04C487)
the Guangdong Natural Science Foundation(2016A030312012)
the Pearl River S&T Nova Program of Guangzhou(201806010033)
the Guangzhou Science and Technology Project(201805010004)
the National Research Foundation Singapore
the National Natural Science Foundation of China(NSFC)Joint Grant NRF2017NRFNSFC002-015
partially supported by the National Research Foundation,Prime Minister’s Office,Singapore,under its Competitive Research Programme(CRP award no.NRF-CRP15-2015-03).
