Creation of a 50,000λ long needle-like field with 036λ width: comment

Chávez-Cerda, Sabino; Pu, Jixiong

doi:10.1364/josaa.32.001209

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…The strongly developing branch of near field (evanescent) needle beams can only briefly be touched here. With optical micro-and nanostructures and by exploiting plasmonic mechanisms, sub-wavelength needle beams ('plasmonic' or 'photonic nanojets') of large depths of focus are obtained [30,[90][91][92][93][94][95][96][97][98][99][100][101][102]. Aspect ratios of > 10 5 were reported [90][91][92].…”

Section: Introductionmentioning

confidence: 99%

Needle beams: a review

Grünwald

Böck

2020

Advances in Physics: X

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Needle beams are highly attractive for applications which take advantage from a spatial and temporal localization of photons. High intensities, high resolution and extended depth of focus lead to fundamental advances in the optical system performance. Ultrashort, fringe-free, self-reconstructing nondiffracting pulses with undistorted temporal transfer are obtained by generating truncated Bessel beams under self-apodization conditions. Nondiffracting Talbot self-imaging of needle beam arrays enables to transfer near field information to the Fraunhofer zone. With addressable arrays of needle beams, reconfigurable time-wavefront sensors are built up. Moreover, spatial light modulators and flexible axicons are used to realize structured, highly localized wavepackets, accelerating beams and nondiffracting images.

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Section: Introductionmentioning

confidence: 99%

Needle beams: a review

Grünwald

Böck

2020

Advances in Physics: X

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Creation of a 50,000λ long needle-like field with 036λ width: reply

2015

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This is the reply to the comment by Chavez-Cerda and Pu [J. Opt. Soc. Am. A32, 1209 (2015)JOAOD61084-752910.1364/JOSAA.32.001209] on our recent work about the 50,000λ long needle-like field [J. Opt. Soc. Am. A31, 500 (2014)JOAOD60740-323210.1364/JOSAA.31.000500]. First, they employed an incorrect boundary condition as the fundament of their argument. In fact, it is not the electric field but its tangential component that must be zero at the surface of the perfect metal. Our result is completely consistent with the correct boundary condition. Second, a constant phase factor in the incident radially polarized beam, exp(jπ/4), for instance, has no influence on the result. Accordingly, our initial condition is proper.

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Optical super-oscillation and super-oscillatory optical devices

Chen¹,

Wen²,

Wu³

2017

Acta Phys. Sin.

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The diffraction limit of traditional optical device greatly restricts the further development of optical super-resolution systems. It is a great challenge to overcome the diffraction limit at a device level, and achieve label-free far-field super-resolution imaging. Optical super-oscillation provides a new way to realize super-resolution since it allows the generation of arbitrary small structures in optical fields in the absence of evanescent waves. The researches of optical super-oscillation and super-oscillatory optical devices have grown rapidly in recent decades. Optical super-oscillation and super-oscillatory optical devices have been demonstrated theoretically and experimentally to show great potential applications in label-free far-field optical microscopy, far-field imaging and high-density data storage. In this paper, we gives a broad review of recent development in optical super-oscillation and super-oscillatory optical devices, including basic concepts, design tools and methods, testing techniques for super-oscillatory optical field, and their applications.

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Creation of a 50,000λ long needle-like field with 036λ width: comment

Cited by 3 publications

References 12 publications

Needle beams: a review

Needle beams: a review

Creation of a 50,000λ long needle-like field with 036λ width: reply

Optical super-oscillation and super-oscillatory optical devices

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