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S.R. Mishra

Bio: S.R. Mishra is an academic researcher. The author has contributed to research in topics: Wave vector & Scalar field. The author has an hindex of 1, co-authored 1 publications receiving 167 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, a vector wave analysis of a Bessel beam is presented in which electric and magnetic field vectors satisfy Maxwell's equations, and the results are compared with those obtained in the scalar wave theory.

188 citations


Cited by
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Journal ArticleDOI
TL;DR: In this article, it is shown that a nondiffracting beam disturbed by an obstacle is able to reconstruct its initial amplitude profile under free propagation, and simple theoretical explanation, numerical simulation and experimental verification of the effect are presented.

459 citations

Journal ArticleDOI
TL;DR: An annular pupil, which can be used to produce a Bessel beam, when combined with radially polarized illumination promises improvements in microscope resolution, increased packing density for optical storage, and finer optical lithography.
Abstract: An annular pupil, which can be used to produce a Bessel beam, when combined with radially polarized illumination promises improvements in microscope resolution, increased packing density for optical storage, and finer optical lithography. When combined with a circular detection pupil in confocal microscopy a point-spread function 112 nm wide results (lambda = 488 nm). Radially polarized annular illumination of a solid-immersion lens can yield a focal spot smaller than 100 nm for lambda = 488 nm. Use of radially polarized illumination with pupil masks is discussed.

323 citations

Journal ArticleDOI
TL;DR: In this article, a common Gaussian beam is transformed into a vector Bessel beam, which is useful for particle trapping, near-field probes, and laser machining, enabling applications such as tractor beams in compact nanoscale devices.
Abstract: Metamaterial surfaces (metasurfaces) can generate tailored electromagnetic wavefronts with spatially varying phase and polarization profiles. In this study a common Gaussian beam is transformed into a vector Bessel beam, which is useful for particle trapping, near-field probes, and laser machining. Going forward, the design and fabrication methodology presented here could be used to create efficient metasurfaces even at optical wavelengths, enabling applications such as tractor beams in compact nanoscale devices.

205 citations

Journal ArticleDOI
TL;DR: In this paper, the physical concept of the nondiffracting propagation is presented and the basic properties of the non-defracting beams are reviewed, and attention is also focused to the experimental realization and to applications of the nonsmooth beams.
Abstract: The controversial term “nondiffracting beam” was introduced into optics by Durnin in 1987. Discussions related to that term revived interest in problems of the light diffraction and resulted in an appearance of the new research direction of the classical optics, dealing with the localized transfer of electromagnetic energy. In this paper, the physical concept of the nondiffracting propagation is presented and the basic properties of the nondiffracting beams are reviewed. Attention is also focused to the experimental realization and to applications of the nondiffracting beams.

189 citations

Book ChapterDOI
TL;DR: In this paper, Turunen and Friberg dealt with a class of fields with propagation-invariant properties such as the optical intensity distribution and applied them to scalar and electromagnetic approaches.
Abstract: The first article by Turunen and Friberg deals with a class of fields with propagation-invariant properties such as the optical intensity distribution. Coherent and partially coherent stationary and pulsed solutions are treated in view of scalar and electromagnetic approaches. Approximations of ideal propagation-invariant fields and methods for their generation are discussed. Finally, some application areas are covered.

149 citations