Axial sub-Fourier focusing of an optical beam

Zacharias, Thomas; Hadad, Barak; Bahabad, Alon; Eliezer, Yaniv

doi:10.1364/ol.42.003205

Cited by 16 publications

(12 citation statements)

References 22 publications

(29 reference statements)

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“…The phenomenon was first experimentally observed in the diffraction of coherent light by a quasicrystal array of nanoholes in a metal screen and its potential for spatial and temporal super-resolution focusing and imaging without evanescent fields was recognized, see Refs. [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Far-Field Superoscillatory Metamaterial Superlens

Yuan

Rogers

et al. 2019

Phys. Rev. Applied

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We demonstrate a metamaterial superlens: a planar array of discrete subwavelength metamolecules with individual scattering characteristics tailored to vary spatially to create subdiffraction superoscillatory focus of, in principle, arbitrary shape and size. Metamaterial free-space lenses with previously unattainable effective numerical apertures -as high as 1.52 -and foci as small as 0.33λ in size are demonstrated. Superresolution imaging with such lenses is experimentally verified breaking the conventional diffraction limit of resolution and exhibiting resolution close to the size of the focus. Our approach will enable far-field label-free super-resolution nonalgorithmic microscopies at harmless levels of intensity, including imaging inside cells, nanostructures, and silicon chips, without impregnating them with fluorescent materials.

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Section: Introductionmentioning

confidence: 99%

Far-Field Superoscillatory Metamaterial Superlens

Yuan

Rogers

et al. 2019

Phys. Rev. Applied

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“…We note that the propagation dynamics of the superoscillatory waves was considered previously. 33,[41][42][43] In this work, the generated superoscillatory wave results from superposition of the in-phase diffracted waves. Hence, the generated wave form has a particularly Bessel-like function that exhibits weakly diffracting property during propagation.…”

Section: Resultsmentioning

confidence: 99%

Optical superoscillatory waves without side lobes along a symmetric cut

Wang

Jia

et al. 2021

Adv. Photon.

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Optical superoscillation refers to an intriguing phenomenon of a wave packet that can oscillate locally faster than its highest Fourier component, which potentially produces an extremely localized wave in the far field. It provides an alternative way to overcome the diffraction limit, hence improving the resolution of an optical microscopy system. However, the optical superoscillatory waves are inevitably accompanied by strong side lobes, which limits their fields of view and, hence, potential applications. Here, we report both experimentally and theoretically a new superoscillatory wave form, which not only produces significant feature size down to deep subwavelength, but also completely eliminates side lobes in a particular dimension. We demonstrate a new mechanism for achieving such a wave form based on a pair of moonlike sharp-edge apertures. The resultant superoscillatory wave exhibits Bessel-like forms, hence allowing long-distance propagation of subwavelength structures. The result facilitates the study of optical superoscillation and on a fundamental level eliminates the compromise between the superoscillatory feature size and the field of view.

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“…The superoscillation can be realized by superposition of different light modes such as the Airy modes and the Bessel modes . While these eigenmode‐based method involves complicated mathematics, the most concerned technique for realization of superoscillatary light beams relies on designing an optical amplitude or phase mask.…”

Section: Introductionmentioning

confidence: 99%

Generation and Propagation of Optical Superoscillatory Vortex Arrays

Lin

Deng

et al. 2019

Annalen der Physik

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Superoscillation is an intriguing wave phenomenon which enables subwavelength features propagating into far field and hence has potential applications in super-resolution microscopy as well as particle trapping and manipulation. While previous demonstrations mostly concentrate on designing complicated nanostructures for generating uncontrollable superoscillatory functions, here a new technique which allows for creating polynomially shaped superoscillatory functions that contain phase singularity arrays is demonstrated both theoretically and experimentally. Such a technique is implemented in optical experiments for the first time and controllable superoscillatory lobes with feature much below the diffraction limit is achieved. More importantly, a general theoretical framework, which, to our knowledge, has not been reported before, is developed to show how the created superoscillations propagate to a distance of many Rayleigh ranges and eventually disappear when the distance is sufficiently larger. The validity of the model is confirmed by the experiments. The results may trigger further studies in light field shaping and manipulations in subwavelength scale.

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Axial sub-Fourier focusing of an optical beam

Cited by 16 publications

References 22 publications

Far-Field Superoscillatory Metamaterial Superlens

Far-Field Superoscillatory Metamaterial Superlens

Optical superoscillatory waves without side lobes along a symmetric cut

Generation and Propagation of Optical Superoscillatory Vortex Arrays

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