Optical spin-symmetry breaking for high-efficiency directional helicity-multiplexed metaholograms

Naveed, Muhammad; Ansari, Muhammad Afnan; Kim, Inki; Badloe, Trevon; Kim, Joohoon; Oh, Dong Kyo; Riaz, Kashif; Tauqeer, Tauseef; Younis, Usman; Saleem, Murtaza; Anwar, Muhammad Sabieh; Zubair, Muhammad; Mehmood, Muhammad Qasim; Rho, Junsuk

doi:10.1038/s41378-020-00226-x

Cited by 103 publications

(67 citation statements)

References 57 publications

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“…Different geometries of meta‐atoms can be researched in innovative ways to produce multiplexed holography and dual‐mode metasurfaces. With the superior functionalities compared to conventional devices, metasurface holography will continue to mature and be able to produce real‐life applications 132–136 such as virtual/augmented reality devices, data storage, and security.…”

Section: Discussionmentioning

confidence: 99%

Geometric and physical configurations of meta‐atoms for advanced metasurface holography

Kim

Yang

Badloe

et al. 2021

InfoMat

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Metasurfaces consisting of subwavelength structures, so‐called meta‐atoms, have steadily attracted considerable attention for advanced holography due to their advantages in terms of high‐resolution holographic images, large field of view, and compact device volume. In contrast to conventional holographic displays using bulky conventional diffractive optical elements, metasurface holography enables arbitrary complex wavefront shaping with a much smaller footprint. In this review, we classify metasurface holography according to the meta‐atom design methodologies, which can further expand hologram functionalities. We describe light‐matter interactions, particularly in metasurface systems, using the relevant the Jones matrix to rigorously explain modulations of the amplitude, phase, and polarization of light. Six different types of meta‐atoms are presented, and the corresponding achievable wavefronts that form the holographic images in the far‐field are also provided. Such a simple classification will give a straightforward approach to design and further realize advanced metasurface holographic devices.

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Section: Discussionmentioning

confidence: 99%

Geometric and physical configurations of meta‐atoms for advanced metasurface holography

Kim

Yang

Badloe

et al. 2021

InfoMat

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“…Research on metasurfaces has improved their functionality, performance, and, along with the development of reconfigurable metasurfaces with actively tunable properties, has unlocked new fields of nanophotonics. New design techniques that combine multiple meta‐atoms [ 228 ] or optical phenomena [ 229,230 ] in a single metasurface to produce metasurfaces that are polarization‐ or direction‐sensitive could be useful for the integration of modulation methods that control the polarization of light. The materials that make up metasurfaces are a key ingredient to attain tunable functional devices.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Tunable Metasurfaces: The Path to Fully Active Nanophotonics

Badloe

Lee

Seong

et al. 2021

Advanced Photonics Research

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In the field of nanophotonics, metasurfaces have come to the forefront in real‐world applications, owing to their accessible exotic optical properties that can be readily designed and fabricated using currently available techniques. The subwavelength dimensions and lightweight characteristics of metasurfaces are attractive qualities for the miniaturization of optical devices and are already exploited in devices that can rival, and sometimes even outperform, conventional bulky optics. Over the past decade, ample research has been undertaken to produce high‐performance metasurfaces with exciting optical properties that cannot be found in nature or achieved with conventional optics. To open the path to widely used devices in our everyday lives, the next obvious step for metasurfaces is the development of tunability. Herein, the techniques and development of applications of tunable metasurfaces are presented through the incorporation of active materials and controllable external stimuli, and the uncovered tunable characteristics are critically analyzed. The review rounds up by proposing the future directions and prospects for actively tunable metasurfaces and their potential practical applications.

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“…Optical metasurfaces are made up of precisely designed structures, known as meta-atoms, that can modulate the phase [ 1 , 2 ], amplitude [ 3 , 4 , 5 ], and polarization [ 6 , 7 ] of incident light. Metalenses (MLs) [ 8 , 9 , 10 , 11 , 12 , 13 , 14 ], meta-holograms [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ], structural color [ 28 , 29 , 30 , 31 ], light detection [ 32 , 33 , 34 , 35 , 36 , 37 , 38 ], perfect absorber [ 39 , 40 ], and sensors [ 41 , 42 , 43 , 44 , 45 , 46 , 47 ] are typical applications of optical metasurfaces. Recently, various improvements to MLs have been repo...…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Luminous Intensity Emission from Incoherent LED Light Sources within the Detection Angle of 10° Using Metalenses

et al. 2022

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In this work, we present metalenses (MLs) designed to enhance the luminous intensity of incoherent light-emitting diodes (LEDs) within the detection angles of 0° and 10°. The detection angle of 0° refers to the center of the LED. Because the light emitted from LEDs is incoherent and expressed as a surface light source, they are numerically described as a set of point sources and calculated using incoherent summation. The titanium dioxide (TiO2) and amorphous silicon (a-Si) nanohole meta-atoms are designed; however, the full 2π phase coverage is not reached. Nevertheless, because the phase modulation at the edge of the ML is important, an ML is successfully designed. The typical phase profile of the ML enhances the luminous intensity at the center, and the phase profile is modified to increase the luminous intensity in the target detection angle region. Far field simulations are conducted to calculate the luminous intensity after 25 m of propagation. We demonstrate an enhancement of the luminous intensity at the center by 8551% and 2115% using TiO2 and a-Si MLs, respectively. Meanwhile, the TiO2 and a-Si MLs with the modified phase profiles enhance the luminous intensity within the detection angle of 10° by 263% and 30%, respectively.

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Optical spin-symmetry breaking for high-efficiency directional helicity-multiplexed metaholograms

Cited by 103 publications

References 57 publications

Geometric and physical configurations of meta‐atoms for advanced metasurface holography

Geometric and physical configurations of meta‐atoms for advanced metasurface holography

Tunable Metasurfaces: The Path to Fully Active Nanophotonics

Enhancement of Luminous Intensity Emission from Incoherent LED Light Sources within the Detection Angle of 10° Using Metalenses

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