Spectral anomalies at wave-front dislocations
Abbreviated Journal Title
Phys. Rev. Lett.
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.
Physical Review Letters
"Spectral anomalies at wave-front dislocations" (2002). Faculty Bibliography 2000s. 3406.