Anomalous behavior of spectra near phase singularities of focused waves.
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Key Findings
Abstract
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. In particular, when the spectrum of the wave in the aperture consists of a single line with a narrow Gaussian profile, the spectrum near a phase singularity (i.e., near points of zero intensity of some particular spectral component) changes drastically along a closed loop around the singularity. The spectrum is redshifted at some points, blueshifted at others, and is split into two lines elsewhere.
Affiliation
Department of Physics and Astronomy, University of Rochester, River Campus Station, Rochester, NY 14627-0171, USA.
External References
- PubMed ID:
- 11800944
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