2021
DOI: 10.1021/acsphotonics.1c00411
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Holographic Super-Resolution Metalens for Achromatic Sub-Wavelength Focusing

Abstract: Optical super-resolution diffractive metalenses have been promising candidates for realizing optical imaging and a microscope beyond the Abbe diffraction limit. An achromatic super-resolution metalens is particularly important for practical applications; however, it remains challenging to achieve high-numerical-aperture achromatic super-resolution metalens for subwavelength focusing. Herein, a holographic approach of realizing a multiwavelength achromatic subwavelength super-resolution focusing is proposed. Th… Show more

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Cited by 35 publications
(11 citation statements)
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“…Furthermore, one can seek other approaches to realize achromatic focusing. For example, superoscillation, which is usually utilized for subwavelength super-resolution focusing, has also been reported as a holographic approach for achromatic focusing 114 . A binary amplitude mask is constructed by two sets of PB meta-atom with different sizes but sharing the same rotating regulation.…”
Section: Progress and Challenges For Typical Performancesmentioning
confidence: 99%
“…Furthermore, one can seek other approaches to realize achromatic focusing. For example, superoscillation, which is usually utilized for subwavelength super-resolution focusing, has also been reported as a holographic approach for achromatic focusing 114 . A binary amplitude mask is constructed by two sets of PB meta-atom with different sizes but sharing the same rotating regulation.…”
Section: Progress and Challenges For Typical Performancesmentioning
confidence: 99%
“…Using this feature, the metal halide lamps used in microscopy are usually equipped with elliptical reflectors to generate a concentrated spot of light by embedding the bulb at one focus of the ellipse. However, almost all of the reported planar metalenses, including zone-plate-type [ 23 , 24 , 25 , 26 ], metasurface-type [ 9 , 27 , 28 , 29 , 30 ] and photosieves-type [ 31 , 32 , 33 ], have been of circular symmetric topology, and then lead to isotropic sub-diffraction-limited focal spots in the focal plane, as shown in Figure 1 a. The elliptical configuration has seldom been investigated in the construction of a diffractive lens, due to the complicated field modulation property.…”
Section: Resultsmentioning
confidence: 99%
“…Moreover, the geometrical shape and refractive index distribution of microlens will lead to strong group delay that cannot be compensated, resulting in significant chromatic aberration in a wide wavelength range which is a important problem in the field of optical fiber imaging [15] . Metalens, as a kind of ultrathin metasurface which is a class of subwavelength planar device composed of manually coded nanoblock arrays, has been widely used in various optical imaging systems [16][17][18][19] . Metalenses control the optical phase by engineering the geometric parameters of surface materials, so as to manipulate the incident wavefront to realize diversified foucing light field [20][21][22][23][24] .…”
Section: Introductionmentioning
confidence: 99%