Metasurface has recently become very appealing for wavefront control due to its simplicity in fabrication. Its high resolution in constructing a desired wavefront makes it a potential medium to create holographic images and ultrathin carpet cloaks for both electromagnetic and acoustic waves. In this work, we investigate how the holographic or projection principle can be utilized to achieve illusion effect in order to turn a particular object and source into a target configuration, with a close relationship to external cloaking in the framework of transformation optics. Our framework designs the required metasurface based on interference between the fields of the original and the target configurations. Such a metasurface then cancels the scattered field of the original object and projects the desired field of the target object at the same time. We discuss how an external cloak and a source or object shifter are possible through such a scheme. Possible experiments in both optics and elastic waves will also be discussed.
Jensen Li, "External cloaking and illusion with metasurfaces (Conference Presentation)," Proc. SPIE 10536, Smart Photonic and Optoelectronic Integrated Circuits XX, 105360X (Presented at SPIE OPTO: January 31, 2018; Published: 14 March 2018); https://doi.org/10.1117/12.2297063.5751515413001.
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