TY - JOUR AB - 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. AU - Frese, Daniel AU - Sain, Basudeb AU - Zhou, Hongqiang AU - Wang, Yongtian AU - Huang, Lingling AU - Zentgraf, Thomas ID - 26987 IS - 18 JF - Nanophotonics SN - 2192-8614 TI - A wavelength and polarization selective photon sieve for holographic applications VL - 10 ER - TY - JOUR AB - The nonlinear processes of frequency conversion such as second harmonic generation (SHG) usually obey certain selection rules, resulting from the preservation of different kinds of physical quantities, e.g. the angular momentum. For the SHG created by a monolayer of transition-metal dichalcogenides (TMDCs) such as WS2, the valley-exciton locked selection rule predicts an SHG signal in the cross-polarization state. By combining plasmonic nanostructures with a monolayer of TMDC, a hybrid metasurface is realized, which affects this nonlinear process because of an additional polarization conversion process. Here, we observe that the plasmonic metasurface modifies the light-matter interaction with the TMDC, resulting in an SHG signal that is co-polarized with respect to the incident field, which is usually forbidden for the monolayers of TMDC. We fabricate such hybrid metasurfaces by placing plasmonic nanorods on top of a monolayer WS2 and study the valley-exciton locked SHG emission from such system for different parameters, such as wavelength and polarization. Furthermore, we show the potential of the hybrid metasurface for tailoring nonlinear processes by adding additional phase information to the SHG signal using the Pancharatnam-Berry phase effect. This allows direct tailoring of the SHG emission to the far-field. AU - Spreyer, Florian AU - Zhao, Ruizhe AU - Huang, Lingling AU - Zentgraf, Thomas ID - 15480 IS - 2 JF - Nanophotonics SN - 2192-8614 TI - Second harmonic imaging of plasmonic Pancharatnam-Berry phase metasurfaces coupled to monolayers of WS2 VL - 9 ER - TY - JOUR AU - Huang, Lingling AU - Zhang, Shuang AU - Zentgraf, Thomas ID - 1765 IS - 6 JF - Nanophotonics SN - 2192-8614 TI - Metasurface holography: from fundamentals to applications VL - 7 ER - TY - JOUR AU - Chen, Shumei AU - Li, Guixin AU - Cheah, Kok Wai AU - Zentgraf, Thomas AU - Zhang, Shuang ID - 4357 IS - 6 JF - Nanophotonics SN - 2192-8614 TI - Controlling the phase of optical nonlinearity with plasmonic metasurfaces VL - 7 ER -