Interactive holography offers unmatched levels of immersion and user engagement in the field of future display.Despite of the substantial progress has been made in dynamic meta-holography,the realization of real-time,...Interactive holography offers unmatched levels of immersion and user engagement in the field of future display.Despite of the substantial progress has been made in dynamic meta-holography,the realization of real-time,highly smooth interactive holography remains a significant challenge due to the computational and display frame rate limitations.In this study,we introduced a dynamic interactive bitwise meta-holography with ultra-high computational and display frame rates.To our knowledge,this is the first reported practical dynamic interactive metasurface holographic system.We spa-tially divided the metasurface device into multiple distinct channels,each projecting a reconstructed sub-pattern.The switching states of these channels were mapped to bitwise operations on a set of bit values,which avoids complex holo-gram computations,enabling an ultra-high computational frame rate.Our approach achieves a computational frame rate of 800 kHz and a display frame rate of 23 kHz on a low-power Raspberry Pi computational platform.According to this methodology,we demonstrated an interactive dynamic holographic Tetris game system that allows interactive gameplay,color display,and on-the-fly hologram creation.Our technology presents an inspiration for advanced dynamic meta-holography,which is promising for a broad range of applications including advanced human-computer interaction,real-time 3D visualization,and next-generation virtual and augmented reality systems.展开更多
The field of high-bandwidth holography has been extensively studied over the past decade.Orbital angular momentum(OAM)holography,which utilizes vortex beams with theoretically unbounded OAM modes as information carrie...The field of high-bandwidth holography has been extensively studied over the past decade.Orbital angular momentum(OAM)holography,which utilizes vortex beams with theoretically unbounded OAM modes as information carriers,showcases the large capacitance of hologram storage.However,OAM holography has been limited to a single wavelength,restricting its potential for full-color holography and displays.In this study,we propose wavelength and OAM multiplexed holography that utilizes the multiple dimensions of light—wavelength and OAM—to provide a multi-color platform that expands the information capacity of holographic storage devices.The proposed wavelength-OAM multiplexed holography is physically realized by a metasurface,the state-of-the-art optical element consisting of an array of artificially engineered nanostructures.Hydrogenated silicon meta-atoms,the constituents of the metasurface,are engineered to possess wavelength selectivity by tailoring the dispersion of polarization conversion.These meta-atoms are used to encode the calculated OAM-preserved phase maps based on our design.The sampling grid of the phase map is rotated by 45°,which effectively suppress higher-order diffraction,providing a great strategy for achieving large field-of-view(FOV)holography.We successfully demonstrate six holographic images that are selectively reconstructed under the illumination of light with specific wavelengths(λ=450,635 nm)and topological charges(l=-2,0,2),without high-order diffraction.Our work suggests that ultrathin meta-holograms can potentially realize ultrahigh-bandwidth full-color holography and holographic video displays with large FOV.展开更多
Holography,with the capability of recording and reconstructing wavefronts of light,has emerged as an ideal approach for future deep-immersive naked-eye display.However,the shortcomings(e.g.,small field of view,twin im...Holography,with the capability of recording and reconstructing wavefronts of light,has emerged as an ideal approach for future deep-immersive naked-eye display.However,the shortcomings(e.g.,small field of view,twin imaging,multiple or-ders of diffraction)of traditional dynamic holographic devices bring many challenges to their practical applications.Metasurfaces,planar artificial materials composed of subwavelength unit cells,have shown great potential in light field manipulation,which is useful for overcoming these drawbacks.Here,we review recent progress in the field of dynamic metasurface holography,from realization methods to design strategies,mainly including typical research works on dy-namic meta-holography based on tunable metasurfaces and multiplexed metasurfaces.Emerging applications of dynam-ic meta-holography have been found in 3D display,optical storage,optical encryption,and optical information pro-cessing,which may accelerate the development of light field manipulation and micro/nanofabrication with higher dimen-sions.A number of potential applications and possible development paths are also discussed at the end.展开更多
基金supports from National Natural Science Foundation of China (Grant No.62205117,52275429)National Key Research and Development Program of China (Grant No.2021YFF0502700)+3 种基金Young Elite Scientists Sponsorship Program by CAST (Grant No.2022QNRC001)West Light Foundation of the Chinese Academy of Sciences (Grant No.xbzg-zdsys-202206)Knowledge Innovation Program of Wuhan-Shuguang,Innovation project of Optics Valley Laboratory (Grant No.OVL2021ZD002)Hubei Provincial Natural Science Foundation of China (Grant No.2022CFB792).
文摘Interactive holography offers unmatched levels of immersion and user engagement in the field of future display.Despite of the substantial progress has been made in dynamic meta-holography,the realization of real-time,highly smooth interactive holography remains a significant challenge due to the computational and display frame rate limitations.In this study,we introduced a dynamic interactive bitwise meta-holography with ultra-high computational and display frame rates.To our knowledge,this is the first reported practical dynamic interactive metasurface holographic system.We spa-tially divided the metasurface device into multiple distinct channels,each projecting a reconstructed sub-pattern.The switching states of these channels were mapped to bitwise operations on a set of bit values,which avoids complex holo-gram computations,enabling an ultra-high computational frame rate.Our approach achieves a computational frame rate of 800 kHz and a display frame rate of 23 kHz on a low-power Raspberry Pi computational platform.According to this methodology,we demonstrated an interactive dynamic holographic Tetris game system that allows interactive gameplay,color display,and on-the-fly hologram creation.Our technology presents an inspiration for advanced dynamic meta-holography,which is promising for a broad range of applications including advanced human-computer interaction,real-time 3D visualization,and next-generation virtual and augmented reality systems.
基金supported by the Samsung Research Funding&Incubation Center for Future Technology grant(SRFC-IT1901-52)funded by Samsung ElectronicsJ.R.acknowledges the POSCO-POSTECH-RIST Convergence Research Center program funded by POSCO+4 种基金the National Research Foundation(NRF)grant(RS-2024-00356928)funded by the Ministry of Science and ICT(MSIT)of the Korean governmentthe NRF Sejong Science fellowships(RS-2023-00209560,RS-2023-00252778)respectively,funded by the MSIT of the Korean government.J.J.acknowledges the Hyundai Motor Chung Mong-Koo fellowship.J.K.acknowledges the Asan Foundation Biomedical Science fellowship,and the Presidential Science fellowship funded by the MSIT of the Korean governmentsupport from the Lee-Lucas Chair in Physics,and the Australia Research Council(DP220102152)support from the Australian Research Council(DE220101085 and DP220102152).
文摘The field of high-bandwidth holography has been extensively studied over the past decade.Orbital angular momentum(OAM)holography,which utilizes vortex beams with theoretically unbounded OAM modes as information carriers,showcases the large capacitance of hologram storage.However,OAM holography has been limited to a single wavelength,restricting its potential for full-color holography and displays.In this study,we propose wavelength and OAM multiplexed holography that utilizes the multiple dimensions of light—wavelength and OAM—to provide a multi-color platform that expands the information capacity of holographic storage devices.The proposed wavelength-OAM multiplexed holography is physically realized by a metasurface,the state-of-the-art optical element consisting of an array of artificially engineered nanostructures.Hydrogenated silicon meta-atoms,the constituents of the metasurface,are engineered to possess wavelength selectivity by tailoring the dispersion of polarization conversion.These meta-atoms are used to encode the calculated OAM-preserved phase maps based on our design.The sampling grid of the phase map is rotated by 45°,which effectively suppress higher-order diffraction,providing a great strategy for achieving large field-of-view(FOV)holography.We successfully demonstrate six holographic images that are selectively reconstructed under the illumination of light with specific wavelengths(λ=450,635 nm)and topological charges(l=-2,0,2),without high-order diffraction.Our work suggests that ultrathin meta-holograms can potentially realize ultrahigh-bandwidth full-color holography and holographic video displays with large FOV.
基金financial supports from China Postdoctoral Science Foundation(2019M662597)Open Funding of State Key Laboratory of Optical Tech-nologies for Microfabrication(2019).
文摘Holography,with the capability of recording and reconstructing wavefronts of light,has emerged as an ideal approach for future deep-immersive naked-eye display.However,the shortcomings(e.g.,small field of view,twin imaging,multiple or-ders of diffraction)of traditional dynamic holographic devices bring many challenges to their practical applications.Metasurfaces,planar artificial materials composed of subwavelength unit cells,have shown great potential in light field manipulation,which is useful for overcoming these drawbacks.Here,we review recent progress in the field of dynamic metasurface holography,from realization methods to design strategies,mainly including typical research works on dy-namic meta-holography based on tunable metasurfaces and multiplexed metasurfaces.Emerging applications of dynam-ic meta-holography have been found in 3D display,optical storage,optical encryption,and optical information pro-cessing,which may accelerate the development of light field manipulation and micro/nanofabrication with higher dimen-sions.A number of potential applications and possible development paths are also discussed at the end.
