Journal ArticleDOI
Phenomenon of spectral switches as a new effect in singular optics with polychromatic light
John T. Foley,Emil Wolf +1 more
TLDR
It is shown that the recently discovered phenomenon of so-called spectral switches has a natural interpretation in the framework of singular optics with polychromatic light and should be regarded as being primarily a manifestation of diffraction- induced spectral changes rather than correlation-induced spectral changes.Abstract:
It is shown that the recently discovered phenomenon of so-called spectral switches has a natural interpretation in the framework of singular optics with polychromatic light and that it should be regarded as being primarily a manifestation of diffraction-induced spectral changes rather than correlation-induced spectral changes as was suggested in the original papers [the first one appearing in Opt. Commun. 162, 57 (1999)] reporting this effect.read more
Citations
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Journal ArticleDOI
Observation of chromatic effects near a white-light vortex
Jonathan Leach,Miles J. Padgett +1 more
TL;DR: In this paper, a spatial light modulator is used to modify the phase of a light beam to create a spatially coherent, white-light beam containing an optical vortex, which carries an orbital angular momentum that is an integer multiple of per photon.
Journal ArticleDOI
Achromatic optical vortex lens
TL;DR: Two design schemes are proposed for creating a vortex across a bandwidth exceeding 100 nm in the visible region of the spectrum.
Book ChapterDOI
The structure of partially coherent fields
Greg Gbur,Taco D. Visser +1 more
TL;DR: In this article, the authors provide an overview of recent advances, both theoretical and experimental, that have been made in a number of areas of optical coherence, including the introduction of the space-frequency representation of partially coherent fields, and an increased emphasis on the spatial coherence properties of wave fields.
Journal ArticleDOI
'Hidden' singularities in partially coherent wavefields
TL;DR: In this paper, the authors discuss the singular optics of partially coherent and polychromatic light fields and the nature of the singularities in such fields, and show that such fields do not typically possess regions of zero intensity and hence do not possess any obvious phase singularities.
Journal ArticleDOI
Coloured phase singularities
TL;DR: In this article, the spectrum near a typical isolated phase singularity (nodal point of the component wavelengths) can be described by a universal function of position, up to linear distortion and a weak dependence on the spectrum of the source.
References
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Journal ArticleDOI
Dislocations in wave trains
John F. Nye,Michael V Berry +1 more
TL;DR: In this paper, it was shown that dislocations are to be expected whenever limited trains of waves, ultimately derived from the same oscillator, travel in different directions and interfere -for example in a scattering problem.
Journal ArticleDOI
Anomalous behavior of spectra near phase singularities of focused waves.
TL;DR: It is shown that remarkable spectral changes take place in the neighborhood of phase singularities near the focus of a converging, spatially fully coherent polychromatic wave diffracted at an aperture.
Journal ArticleDOI
Spectral shifts and spectral switches of partially coherent light passing through an aperture
TL;DR: In this article, the spectral characteristics in the near zone when a certain class of partially coherent light is incident on a circular aperture were investigated within the Fresnel approximation, and it was shown that, as the distance z between the aperture and the on-axis observation point decreases, the spectral shifts show gradual change.
Journal ArticleDOI
Spectral anomalies at wave-front dislocations.
Gabriel Popescu,Aristide Dogariu +1 more
TL;DR: Using a high-resolution interferometric technique, both the spectral intensity distribution and the spectral phase at the singular points of optical waves are measured and it is shown that this is a general characteristic of optical vortices.
Journal ArticleDOI
Experimental observation of the phenomenon of spectral switch
TL;DR: In this paper, the spectral characteristics of partially coherent light passing through a rectangular or a circular aperture were investigated in the near zone of the near Fresnel approximation, and it was shown that at a critical value of z (the distance between the aperture and the on-axis observation point), the gradual change in the spectral shift shows a rapid spectral switch.