title: Directionally hiding objects and creating illusions above a carpet-like device by reflection holography.
abstract: Realization of a perfect invisibility cloak still challenges the current fabricating technologies. Most experiments, if not all, are hence focused on carpet cloaks because of their relatively low requirements to material properties. Nevertheless, present invisibility carpets are used to hide beneath objects. Here, we report a carpet-like device to directionally conceal objects and further to create illusions above it. The device is fabricated through recording a reflection hologram of objects and is used to produce a time-reversed signal to compensate for the information of the objects and further to create light field of another object so as to realize both functions of hiding the objects and creating illusions, respectively. The carpet-like device can work for macroscopic objects at visible wavelength as the distance between objects and device is at decimeter scale. Our carpet-like device to realizing invisibility and creating illusions may provide a robust way for crucial applications of magic camouflaging and anti-detection etc.
authors.affiliation: School of Physics and Technology, Wuhan University, Wuhan 430072, Hubei, P. R. China.
authors.forename: Qiluan
authors.initials: Q
authors.lastname: Cheng
authors.affiliation: College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, Guangdong, P. R. China.
authors.forename: Kedi
authors.initials: K
authors.lastname: Wu
authors.affiliation: Institute of Information Optics, Zhejiang Normal University, Jinhua 321000, Zhejiang, P. R. China.
authors.forename: Yile
authors.initials: Y
authors.lastname: Shi
authors.affiliation: Institute of Information Optics, Zhejiang Normal University, Jinhua 321000, Zhejiang, P. R. China.
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.affiliation: 1] School of Physics and Technology, Wuhan University, Wuhan 430072, Hubei, P. R. China [2] College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, Guangdong, P. R. China.
authors.forename: Guo Ping
authors.initials: GP
authors.lastname: Wang