Dielectric metasurfaces for distance measurements and three-dimensional imaging

Jin, Chunming; Afsharnia, Mina; Berlich, R.; Fasold, Stefan; Zou, Can; Arslan, Dennis; Staude, Isabelle; Pertsch, Thomas; Setzpfandt, Frank

doi:10.1117/1.ap.1.3.036001

Cited by 51 publications

(50 citation statements)

References 53 publications

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“…In this section, the recently reported advances in three-dimensional depth sensing and other optical sensing technologies using dielectric metalenses are introduced. First, we review the depth sensing methods using light field imaging principles [ 34 , 35 ], other methods based on point spread function (PSF) engineering [ 36 , 37 ], and cascaded metalens system based quantitative phase gradient microscopy [ 38 ].…”

Section: Applications Based On Three-dimensional Imagingmentioning

confidence: 99%

Dielectric Metalens: Properties and Three-Dimensional Imaging Applications

Kim

et al. 2021

Sensors

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Recently, optical dielectric metasurfaces, ultrathin optical skins with densely arranged dielectric nanoantennas, have arisen as next-generation technologies with merits for miniaturization and functional improvement of conventional optical components. In particular, dielectric metalenses capable of optical focusing and imaging have attracted enormous attention from academic and industrial communities of optics. They can offer cutting-edge lensing functions owing to arbitrary wavefront encoding, polarization tunability, high efficiency, large diffraction angle, strong dispersion, and novel ultracompact integration methods. Based on the properties, dielectric metalenses have been applied to numerous three-dimensional imaging applications including wearable augmented or virtual reality displays with depth information, and optical sensing of three-dimensional position of object and various light properties. In this paper, we introduce the properties of optical dielectric metalenses, and review the working principles and recent advances in three-dimensional imaging applications based on them. The authors envision that the dielectric metalens and metasurface technologies could make breakthroughs for a wide range of compact optical systems for three-dimensional display and sensing.

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Section: Applications Based On Three-dimensional Imagingmentioning

confidence: 99%

Dielectric Metalens: Properties and Three-Dimensional Imaging Applications

Kim

et al. 2021

Sensors

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Section: Psf-designer Imagingmentioning

confidence: 99%

“…The image of the scene with depth information was generated by calculating the power cepstrum of measurements taken by the camera. [ 170 ]…”

Section: Computational Meta‐imagingmentioning

confidence: 99%

Meta‐Imaging: from Non‐Computational to Computational

Sihvola

2020

Advanced Optical Materials

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Metamaterials are artificial media composed of periodic/aperiodic subwavelength metal/dielectric structures (i.e., meta-atom). This class of media possess electromagnetic properties not present in the constituent materials and have yielded breakthrough electromagnetic phenomena. The capability of tailoring effective electric permittivity and magnetic permeability responses leads to a wide range of accomplishments, such as enhanced nonlinearity, [1] and electromagnetic cloak. [2] However, high losses, strong

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“…The chromatic aberration is eliminated by integrated resonance units [28][29][30] , which are employed to provide targeted continuous phase compensation for broadband light. Moreover, by advanced phase engineering, various optical metalens applications have been implemented, such as light-field imaging 31,32 , depth sensing 33,34 , entangled quantum light 35 , colour routing [36][37][38][39] , spectral tomography 40 , varied focusing 41,42 , polarisation analysis and generation 43,44 and augmented reality 45 .…”

Section: Introductionmentioning

confidence: 99%

Phase characterisation of metalenses

et al. 2021

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Metalenses have emerged as a new optical element or system in recent years, showing superior performance and abundant applications. However, the phase distribution of a metalens has not been measured directly up to now, hindering further quantitative evaluation of its performance. We have developed an interferometric imaging phase measurement system to measure the phase distribution of a metalens by taking only one photo of the interference pattern. Based on the measured phase distribution, we analyse the negative chromatic aberration effect of monochromatic metalenses and propose a feature size of metalenses. Different sensitivities of the phase response to wavelength between the Pancharatnam-Berry phase-based metalens and propagation phase-reliant metalens are directly observed in the experiment. Furthermore, through phase distribution analysis, it is found that the distance between the measured metalens and the brightest spot of focusing will deviate from the focal length when the metalens has a low nominal numerical aperture, even though the metalens is ideal without any fabrication error. We also use the measured phase distribution to quantitatively characterise the imaging performance of the metalens. Our phase measurement system will help not only designers optimise the designs of metalenses but also fabricants distinguish defects to improve the fabrication process, which will pave the way for metalenses in industrial applications.

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Dielectric metasurfaces for distance measurements and three-dimensional imaging

Cited by 51 publications

References 53 publications

Dielectric Metalens: Properties and Three-Dimensional Imaging Applications

Dielectric Metalens: Properties and Three-Dimensional Imaging Applications

Meta‐Imaging: from Non‐Computational to Computational

Phase characterisation of metalenses

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