12 September 2014 Polarization controlled colorful images reconstructed by reflective meta-hologram
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Holograms, the optical devices to reconstruct pre-designed images, have been evolved dramatically since the advances in today’s nanotechnology [1-4]. Metamaterials, the sub-wavelength artificial structures with tailored refraction index, enable us to design the meta-hologram working in arbitrary frequency region. Here we demonstrated the first reflective type, dual image and high efficient meta-hologram with the incident angle as well as the coherence of incident wave insensitivity in visible region at least from λ = 632.8 nm to λ = 850 nm. The meta-hologram is composed of 50-nm-thick gold cross nano-antenna coupled with 130-nm-thick gold mirror with a 50-nm-thick MgF2 as spacer. It shows different images “RCAS” and “NTU” with high image contract under x- and y-polarized illumination, respectively. Making use of the characteristic of meta-materials, these optical properties of proposed meta-hologram can be transferred to arbitrary electromagnetic region by scale-up the size of the unit cell of meta-hologram, leading to more compact, efficient and promising electromagnetic components.
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Yao-Wei Huang, Yao-Wei Huang, Wei Ting Chen, Wei Ting Chen, Kuang-Yu Yang, Kuang-Yu Yang, Chih-Ming Wang, Chih-Ming Wang, Pin Chieh Wu, Pin Chieh Wu, Greg Sun, Greg Sun, Shulin Sun, Shulin Sun, Lei Zhou, Lei Zhou, Ai Qun Liu, Ai Qun Liu, Din Ping Tsai, Din Ping Tsai, "Polarization controlled colorful images reconstructed by reflective meta-hologram", Proc. SPIE 9160, Metamaterials: Fundamentals and Applications 2014, 91602D (12 September 2014); doi: 10.1117/12.2063297; https://doi.org/10.1117/12.2063297

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