Conformal Volumetric Grayscale Metamaterials

Huang, Qinglan; Gan, Lucia T.; Fan, Jonathan A.

doi:10.1002/adma.202204688

Cited by 5 publications

(4 citation statements)

References 41 publications

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“…Another direction is to understand how breaking the translational symmetry of spaceplates can lead to optical elements that combine space compression, aberration correction, polarization functionality, and wavefront shaping capabilities. Experimentally, grayscale optical spaceplates can be fabricated using multimaterial thin-film deposition and codeposition methods, and binary spaceplates can be fabricated simply using the alternating deposition of two material types. , For longer wavelength spaceplates, additive manufacturing can be used to print composite materials with tailored dielectric constant, providing a route toward high-contrast grayscale devices.…”

Section: Discussionmentioning

confidence: 99%

“…Experimentally, grayscale optical spaceplates can be fabricated using multimaterial thin-film deposition and codeposition methods, and binary spaceplates can be fabricated simply using the alternating deposition of two material types. 39,40 For longer wavelength spaceplates, additive manufacturing can be used to print composite materials with tailored dielectric constant, 41 providing a route toward high-contrast grayscale devices.…”

Section: ■ Conclusionmentioning

confidence: 99%

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Multifunctional Spaceplates for Optical Aberration Correction

Shao,

Lupoiu,

Jiang

et al. 2024

ACS Photonics

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Spaceplates are nonlocal optical devices with the potential to reduce the form factor of optical systems, but current implementations are limited in performance and ability to correct for optical aberrations. We introduce a new class of multifunctional spaceplates, designed using gradient-based freeform optimization, which exhibit exceptional efficiencies, compression ratios, and aberration correcting capabilities. We show that such spaceplates can serve as correctors for metasurfaces and refractive optical elements, and we demonstrate that multifunctional spaceplates can extend to support multispectral, Petzval field curvature, and spherical aberration correction. We anticipate that these spaceplate concepts will enable the realization of ultracompact optical systems.

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Section: Discussionmentioning

confidence: 99%

Section: ■ Conclusionmentioning

confidence: 99%

Multifunctional Spaceplates for Optical Aberration Correction

Shao,

Lupoiu,

Jiang

et al. 2024

ACS Photonics

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“…2D metamaterials in optics can be designed to scatter, [3] refract, [4] and modulate the intensity of [5,6] light, creating new methods for light manipulation. Similarly, electromagnetic waves are scattered into specific shapes, [7,8] cloaked, [8] steered, [9,10] or filtered. [11] DOI: 10.1002/adma.202303541…”

Section: Introductionmentioning

confidence: 99%

Magneto‐Mechanical Bilayer Metamaterial with Global Area‐Preserving Density Tunability for Acoustic Wave Regulation

Sim

Dai

et al. 2023

Advanced Materials

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Abstract2D metamaterials have immense potential in acoustics, optics, and electromagnetic applications due to their unique properties and ability to conform to curved substrates. Active metamaterials have attracted significant research attention because of their on‐demand tunable properties and performances through shape reconfigurations. 2D active metamaterials often achieve active properties through internal structural deformations, which lead to changes in overall dimensions. This demands corresponding alterations of the conforming substrate, or the metamaterial fails to provide complete area coverage, which can be a significant limitation for their practical applications. To date, achieving area‐preserving active 2D metamaterials with distinct shape reconfigurations remains a prominent challenge. In this paper, magneto‐mechanical bilayer metamaterials are presented that demonstrate area density tunability with area‐preserving capability. The bilayer metamaterials consist of two arrays of magnetic soft materials with distinct magnetization distributions. Under a magnetic field, each layer behaves differently, which allows the metamaterial to reconfigure its shape into multiple modes and to significantly tune its area density without changing its overall dimensions. The area‐preserving multimodal shape reconfigurations are further exploited as active acoustic wave regulators to tune bandgaps and wave propagations. The bilayer approach thus provides a new concept for the design of area‐preserving active metamaterials for broader applications.

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“…First, design concepts that utilize advanced global optimization algorithms [33][34][35][36] to perform the freeform design of full metagrating periods [37][38][39][40] can produce devices with enhanced efficiencies and bandwidths beyond the limits of devices based on stitched meta-atoms. Second, multi-layer [41,42] or volumetric [43] freeform metasurfaces support large design landscapes with the potential to enable devices featuring near-unity efficiencies. Improved fabrication will ensure that experimental devices perform with metrics matching theoretical predictions.…”

mentioning

confidence: 99%

Arbitrary Achromatic Polarization Control with Reconfigurable Metasurface Systems

Wang

Phan

et al. 2023

Laser & Photonics Reviews

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Dynamic control over the polarization state of light is foundational for many scientific and technological applications, yet it remains a challenge to dynamically tailor responses with arbitrary polarization bases over a broad bandwidth. Broadband metasurface systems that utilize microscale displacements between two metasurfaces to enable reconfigurable polarization responses within a predefined polarization basis are reported. The metasurface pairs form an interferometer, and the lateral displacements produce detour phase shifts within the interferometer beam paths that mediate polarization state tuning. It is shown how the metasurface systems can be designed using freeform topology optimization to enable tailorable elliptical birefringence responses over a large bandwidth and how cascaded metasurface systems can enable the mapping of input and output polarization states between any two points on the Poincare sphere. It is anticipated that these concepts will have utility in imaging, display, communications, and metrology applications in classical and quantum optical domains.

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Conformal Volumetric Grayscale Metamaterials

Cited by 5 publications

References 41 publications

Multifunctional Spaceplates for Optical Aberration Correction

Multifunctional Spaceplates for Optical Aberration Correction

Magneto‐Mechanical Bilayer Metamaterial with Global Area‐Preserving Density Tunability for Acoustic Wave Regulation

Arbitrary Achromatic Polarization Control with Reconfigurable Metasurface Systems

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