Spectral Anomalies at Wave-Front Dislocations

G. Popescu, A. Dogariu

Research output: Contribution to journalArticlepeer-review


In a recent Letter, Gbur, Visser, and Wolf [Phys. Rev. Lett. 88, 013901 (2002)] predict that remarkable spectral changes can take place in the neighborhood of phase singularities of a diffracted focused wave. We report here the experimental observation of this anomalous spectral behavior and show that this is a general characteristic of optical vortices. Using a high-resolution interferometric technique, we are able to measure directly both the spectral intensity distribution and the spectral phase at the singular points of optical waves.

Original languageEnglish (US)
Pages (from-to)4
Number of pages1
JournalPhysical review letters
Issue number18
StatePublished - 2002
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy


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