Dielectric Meta-Holograms Enabled with Dual Magnetic Resonances in Visible Light

Li, Zile; Kim, Inki; Zhang, Lei; Mehmood, Muhammad Qasim; Anwar, Muhammad Sabieh; Saleem, Murtaza; Lee, Dasol; Nam, Ki Tae; Zhang, Shuang; Luk’yanchuk, Boris; Wang, Yu; Rho, Junsuk; Qiu, Cheng‐Wei

doi:10.1021/acsnano.7b04868

Cited by 169 publications

(109 citation statements)

References 46 publications

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“…In perfect analogy to plasmonics, it is possible to design color filters [36] and (color) holograms [37,38] or to use dielectric nano-structures for "colorprinting" at the diffraction limit [39,40].…”

Section: General Applications Of Dielectric Nano-structuresmentioning

confidence: 99%

Fano-resonances in High Index Dielectric Nanowires for Directional Scattering

Wiecha

Cuche

Kallel

et al. 2018

Springer Series in Optical Sciences

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High refractive index dielectric nanostructures provide original optical properties thanks to the occurrence of size-and shape-dependent optical resonance modes. These modes commonly present a spectral overlap of broad, low-order modes (e.g. dipolar modes) and much narrower, higher-order modes. The latter are usually characterized by a rapidly varying frequency-dependent phase, which -in superposition with the lower order mode of approximately constant phase -leads to typical spectral features known as Fano resonances. Interestingly, such Fano resonances occur in dielectric nanostructures of the simplest shapes. In spheroidal nanoparticles, interference between broad magnetic dipole and narrower electric dipole modes can be observed. In high aspect-ratio structures like nanowires, either the electric or the magnetic dipolar mode (depending on the illumination conditions) interferes with higher order multipole contributions of the same nature (electric or magnetic). Using the analytical Mie theory, we analyze the occurrence of Fano resonances in high-index dielectric nanowires and discuss their consequences like unidirectional scattering. By means of numerical simulations, we furthermore study the impact on those Fano resonances of the shape of the nanowire cross-sections as well as the coupling of two parallel nanowires. The presented results show that all-dielectric nanostructures, even of simple shapes, provide a reliable low-loss alternative to plasmonic nanoantennas. arXiv:1801.05601v1 [physics.app-ph]

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Section: General Applications Of Dielectric Nano-structuresmentioning

confidence: 99%

Fano-resonances in High Index Dielectric Nanowires for Directional Scattering

Wiecha

Cuche

Kallel

et al. 2018

Springer Series in Optical Sciences

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“…Therefore, metasurfaces offer remarkable promise in realizing both 2D and 3D imaging. Furthermore, they have proved their applicability in beam engineering, data storage, security, communication, and display . There are many accounts where plasmonic metasurfaces have been used to realize holograms.…”

Section: Introductionmentioning

confidence: 99%

A Spin‐Encoded All‐Dielectric Metahologram for Visible Light

Ansari

Kim

Lee

et al. 2019

Laser & Photonics Reviews

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120

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Dielectric materials that are low‐loss in the visible spectrum provide a promising platform to realize the pragmatic features of metasurfaces. Here, all‐dielectric, highly efficient, spin‐encoded transmission‐type metaholograms (in the visible domain) are demonstrated by utilizing hydrogenated amorphous silicon (a‐Si:H). In comparison to previously reported visible metaholograms based on TiO2 and other dielectric materials, all‐dielectric metasurfaces provide a cost‐effective more straightforwardly fabricated (aspect ratio 4.7), CMOS compatible, and comparably efficient solution in the visible domain. A unique way of utilizing polarization as an extra degree of freedom in the design to implement transmission‐type helicity‐encoded metaholograms is also proposed. The produced images exhibit high fidelity under both right and left circularly polarized illuminations. The proposed cost‐effective and CMOS‐compatible material and methods open up an avenue for on‐chip development of numerous new phenomena with high efficiency in the visible domain.

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“…The recent advancement in all‐dielectric subwavelength metasurfaces has been applied to many exciting applications such as meta‐holograms, sub‐diffraction imaging (metalenses) to microprinting . Due to its capability of controlling the optical properties such as phase and amplitude, all‐dielectric metasurfaces could be used to circumvent the metallic loss and provide an alternative way for color rendering.…”

Section: Introductionmentioning

confidence: 99%

Kerker‐Conditioned Dynamic Cryptographic Nanoprints

Jang

Jeong

et al. 2018

Advanced Optical Materials

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lasting durability, and dynamic functionality, which holds great potential in revolutionizing traditional coloring technologies and enabling future-oriented applications such as color printing, digital microdisplay, steganographic cryptography, and, etc. Earlier inspiration from nature such as butterfly wing and flora [1,2] provided a new perspective to utilize photonic bandgap crystal to preferentially diffract light, forming bright structural colors. However, the structural colors by photonic crystal suffers from low resolution [2,3] restricted in principle by large pixel due to wavelength-comparable periodicity and multiple unit cells for exciting coherent Bragg diffraction to form the bandgap. [4] The low resolution in photonic crystal has recently been conquered by emerging plasmonic color printing beyond the diffraction limit, where nanoscale metallic structures can be individually controlled to render diverse colors. [3,[5][6][7][8][9][10][11] By absorbing light at the plasmon resonance frequency, the plasmonic structure will redistribute scattering spectrum which differ from that of input beam, thus rendering plasmonic colors. However, inevitable large absorption of resonant plasmonic system will lead to small scattering cross-sections, so it causes fundamental problems like limited range, degraded color pureness, and low brightness. The low quality of plasmonic color printing also impinges on dynamic functionality which many researches are dealing with recently. The previous methods toward dynamic plasmonic colors include complicate external stimulus like redox hydrogenation/ dehydrogenation, [12,13] mechanical deformation, [14,15] liquidcrystal-combined system, [16,17] and other methods. [18][19][20][21] As other approaches, perovskite nanostructures for in situ dynamic colors and three-dimensional chiral plasmonic gold nanoparticle for polarization-resolved colors have been reported. [22,23] However, most of the dynamic approaches hinders accurate manipulation of color and the miniaturization of the optical devices because of the complicated mechanism.The recent advancement in all-dielectric subwavelength metasurfaces has been applied to many exciting applications such as meta-holograms, [24][25][26][27][28][29] sub-diffraction imaging (metalenses) [30,31] to microprinting. [3,[5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][32][33][34][35][36][37][38] Due to its capability of controlling the optical properties such as phase and amplitude, [39][40][41][42][43] all-dielectric metasurfaces could be used to circumvent the metallic loss and provide an alternative way for color rendering. Essential fundamental physics is that each subwavelength unit High-quality and tunable structural color printing with feasible fabrication is a key goal in recent decades, holding the possibility for full-color microdisplay and impeccable cryptographic nanoprints. Plasmonic approach suffers from the inevitable material absorption restricting the color spectrum with suppressed lightness. Recent progress in di...

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Dielectric Meta-Holograms Enabled with Dual Magnetic Resonances in Visible Light

Cited by 169 publications

References 46 publications

Fano-resonances in High Index Dielectric Nanowires for Directional Scattering

Fano-resonances in High Index Dielectric Nanowires for Directional Scattering

A Spin‐Encoded All‐Dielectric Metahologram for Visible Light

Kerker‐Conditioned Dynamic Cryptographic Nanoprints

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