Xue Jiancai, Zhou Zhang-Kai, Lin Limin, Guo Chao, Sun Shang, Lei Dangyuan, Qiu Cheng-Wei, Wang Xue-Hua
1State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics, Sun Yat-sen University, 510275 Guangzhou, China.
2Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583 Singapore.
Light Sci Appl. 2019 Nov 15;8:101. doi: 10.1038/s41377-019-0212-4. eCollection 2019.
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.
超构光学的进展依赖于确定光子材料和几何结构，二者的结合代表了一种实现复杂且理想光学功能的有前景的方法。候选材料选项主要受限于自然可得性。因此，通过正向或逆向方法寻找超原子几何结构，在实现更复杂的现象中起着关键作用。过去的努力主要集中在构建单个超原子的几何结构库，并将各种结构合成到一个设计中。然而，由于通常认为微扰是不利的且需要被抑制，这些努力忽略了微扰超构光学的强大之处。在此，我们报告一种利用由结构和热微扰介导的复合纳米筛的微扰诱导反监视策略。私密信息几乎可以被诱导产生的热光谱漂移完美地隐藏和伪装起来，从而实现信息的隐蔽存储和交换。这种微扰超构光学能够自我指示隐藏信息在传输过程中是否受到攻击。我们的结果建立了一种确保信息和物联网世界更安全的微扰范式。
