Two-tier manipulation of holographic information

Yan, Libin; Xiao, Jianling; Plaskocinski, Tomasz; Biabanifard, Mohammad; Persheyev, Saydulla; Askari, Meisam; Falco, Andrea Di

doi:10.1364/oe.456843

Cited by 12 publications

(9 citation statements)

References 38 publications

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“…To this end, the values of the trapping power were scaled assuming the MSs have a diffraction efficiency of 50%. While it would be practically challenging to measure quantitatively the efficiency, due to the light collection requirement, we note that this value is rather conservative, for common experimental realizations of reflective type metasurfaces. , To quantify the effect of the efficiency on the evaluation of the trap stiffness, we added a shaded region in Figure a, for the MS with NA = 1.2, with an efficiency between 20% (higher boundary) and 80% (lower boundary). Further discussions on the efficiency are included in the Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

“…The holograms were discretized in 12 phase levels and implemented physically using nanorods with different orientation angles θ. The schematic image of a unit nanorod is shown in Figure a, where the dielectric pillars are sandwiched by a top cap and bottom gold layer …”

Section: Design Of Hologram and Meta-atomsmentioning

confidence: 99%

“…The schematic image of a unit nanorod is shown in Figure 3a, where the dielectric pillars are sandwiched by a top cap and bottom gold layer. 47 The response of the meta-atoms was modeled using CST Studio Suite, with unit cell boundary condition applied along the x/y axes. Along the z-axis, for the port we used open boundary conditions and perfect electric conducting boundary conditions for the bottom port.…”

Section: ■ Design Of Hologram and Meta-atomsmentioning

confidence: 99%

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On-Chip Optical Trapping with High NA Metasurfaces

et al. 2023

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Optical trapping of small particles typically requires the use of high NA microscope objectives. Photonic metasurfaces are an attractive alternative to create strongly focused beams for optical trapping applications in an integrated platform. Here, we report on the design, fabrication, and characterization of optical metasurfaces with a numerical aperture up to 1.2 and trapping stiffness greater than 400 pN/μm/W. We demonstrate that these metasurfaces perform as well as microscope objectives with the same numerical aperture. We systematically analyze the impact of the metasurface dimension on the trapping performance and show efficient trapping with metasurfaces with an area as small as 0.001 mm 2 . Finally, we demonstrate the versatility of the platform by designing metasurfaces able to create multisite optical tweezers for the trapping of extended objects.

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Section: Resultsmentioning

confidence: 99%

Section: Design Of Hologram and Meta-atomsmentioning

confidence: 99%

Section: ■ Design Of Hologram and Meta-atomsmentioning

confidence: 99%

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On-Chip Optical Trapping with High NA Metasurfaces

et al. 2023

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“…The hybrid high- Q metasurface (Figure a) consists of a 2D array of dielectric cuboids standing on an Au layer with an optical thickness (200 nm in this paper). The dielectric material is the negative photoresist Ma-N2405 with n ≈ 1.62, which is commonly used in the field of metasurfaces for fabrication purposes. , The structural parameters of the two-dimensional array are also shown in Figure a. The array periodicity in the x and y directions is P .…”

Section: Resultsmentioning

confidence: 99%

Ultrasensitive Refractive Index Sensing Based on Hybrid High-Q Metasurfaces

et al. 2023

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High sensitivity and a large quality factor (Q) are two desirable goals to achieve a high figure of merit (FoM) in refractive index (RI) sensing. However, simultaneously satisfying these two goals is challenging. Herein, we propose a new class of hybrid high-Q metasurfaces, which are dielectric arrays standing on a Au plasmonic nanofilm, possessing the advantages of both high RI sensitivity and a large Q. The hybrid metasurface can support the plasmon-coupled lattice mode, which has extremely narrow full width at half-maximum (fwhm) resulting in a high-Q. The hybrid metasurface can be fabricated by a facile straightforward lithography technique and exhibits ultrahigh FoM values over a wide RI range (1−1.384) due to its narrow fwhm (smaller than 1 nm) and tunable high RI sensitivity. The highest Q and FoM values of 2370 and 1431 were experimentally demonstrated, respectively, giving the proposed hybrid metasurface great potential for building advanced optical biosensors in future applications.

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“…Holographic metasurfaces are particularly well suited to encoding different images into a single design, for example, by multiplexing the incident angles, [27][28][29] polarizations, [30][31][32] angular momentum, [33][34][35] helicity, [36][37][38] wavelengths, [39,40] and surrounding medium. [41][42][43] In addition, the cylindrical shape associated with convex and concave curvatures. Figure 2c,f shows the individual phase distributions for the target images, which are interleaved in a checkerboard arrangement, to produce a single multiplexed phase distribution, shown in Figure 2g.…”

Section: Introductionmentioning

confidence: 99%

Shape Dependent Conformable Holographic Metasurfaces

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Hunter

Robertson

et al. 2023

Adv Materials Technologies

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realizing metasurfaces on flexible substrates is a good way to find practical applications in the real world as they can be conformed to non-flat objects, also in the visible range. [44,45] Their optical response can be coupled [45] or decoupled [46] to their geometrical form, depending on whether the application requires robustness or sensitivity with respect to the shape that they assume. This offers the possibility to multiplex information on to the shape of the metasurface, creating adaptive elements, for example for reconfigurable antennas, photonic skin, or signature control. While previous works have controlled the response of metasurfaces via stretching, [47,48] true shape-multiplexing has not yet been demonstrated. In this paper, we present the design, fabrication, and characterization of conformable metasurfaces which display different holographic images depending on their curvature, as sketched in Figure 1.In the following, we first present our design approach for the multiplexed holograms and for the metasurfaces. We then describe the experimental setup and present and discuss the results. The practical demonstration of our approach was done in the W-band (94 GHz), bending the metasurfaces into cylindrical shapes with opposite curvatures, in reflection configuration as exemplified in Figure 1. For the sake of clarity, the incident light is not shown. It should be noted that our design approach could be readily extended to other frequency domains, albeit with some caveats discussed below. Design and Multiplexing of HologramsThe phase-only holograms were designed using the Gerchberg-Saxton algorithm [49] with the Rayleigh-Sommerfeld [50,51] propagator to model the propagation of light between the metasurface plane and the holographic image plane. To take into account the shape of the beam, we used a Gaussian beam as the source profile, with a beam waist of 2 cm. The intensity profile of the collimated incident beam is shown as Figure S1a, Supporting Information.To encode two images with different curvatures into one design, we calculated the independent holograms for the two different curvatures and interleaved the resulting phase profiles, as illustrated in Figure 2. Figure 2a,d shows the two independent target images to be obtained when the metasurface assumes the convex and concave cylindrical shape curvatures in Figure 2b,e, with radius of curvature R1 = 35 mm and R2 = −100 mm, respectively. R is defined as the radius of a circle that fits the sample holder, and + and -are used to distinguish In this paper, the design, fabrication, and experimental demonstration of conformable holographic metasurfaces are reported. Here, it is shown that the produced holographic image changes as the metasurface is applied to targets with different shapes. The demonstration is based on a reflective type metasurface, where the reflected polarization is perpendicular to that of the incident light. In addition, how the parameters of the metasurface determine the quality of the images produced and the ability to produce ...

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Two-tier manipulation of holographic information

Cited by 12 publications

References 38 publications

On-Chip Optical Trapping with High NA Metasurfaces

On-Chip Optical Trapping with High NA Metasurfaces

Ultrasensitive Refractive Index Sensing Based on Hybrid High-Q Metasurfaces

Shape Dependent Conformable Holographic Metasurfaces

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