Abstract
Abstract Optical metasurfaces are perfect candidates for the phase and amplitude modulation of light, featuring an excellent basis for holographic applications. In this work, we present a dual amplitude holographic scheme based on the photon sieve principle, which is then combined with a phase hologram by utilizing the Pancharatnam–Berry phase. We demonstrate that two types of apertures, rectangular and square shapes in a gold film filled with silicon nanoantennas are sufficient to create two amplitude holograms at two different wavelengths in the visible, multiplexed with an additional phase-only hologram. The nanoantennas are tailored to adjust the spectral transmittance of the apertures, enabling the wavelength sensitivity. The phase-only hologram is implemented by utilizing the anisotropic rectangular structure. Interestingly, such three holograms have quantitative mathematical correlations with each other. Thus, the flexibility of polarization and wavelength channels can be utilized with custom-tailored features to achieve such amplitude and phase holography simultaneously without sacrificing any space-bandwidth product. The present scheme has the potential to store different pieces of information which can be displayed separately by switching the wavelength or the polarization state of the reading light beam.
Highlights
Optical metasurfaces provide outstanding opportunities in light shaping applications within nanometer dimensions
We present a dual amplitude holographic scheme based on the photon sieve principle, which is combined with a phase hologram by utilizing the Pancharatnam–Berry phase
We realized a dual amplitude holographic metasurface based on the photon sieve principle with two distinct wavelengths of reconstruction, multiplexed with a phase-only hologram based on the Pancharatnam–Berry phase
Summary
Optical metasurfaces provide outstanding opportunities in light shaping applications within nanometer dimensions. In the past two decades, metasurfaces have been recognized as an excellent platform for versatile applications in polarizations optics [4,5,6], focusing elements [7,8,9,10,11,12], vortex beam generation [13,14,15], quantum optics [16, 17], holography [18,19,20,21,22] and many more [23, 24]. Due to the design flexibility for phase and amplitude modulation, metasurface holography has appeared as an important element for display applications [25,26,27]. With the opportunity to include manyfold information capability, several holographic multiplexing techniques based on metasurfaces have been developed. To include color operation, which is attractive for the human eye, metasurfaces can either be subdivided into RGB regions to generate colored images [30, 31], or nonlinear material properties of the individual structures can be utilized to create different colored images [32, 33]
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