Exploring the colours of dark light

Details Exploring the colours of dark light Exploring the colours of dark light

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002njph....4...74b&link_type=abstract

New Journal of Physics, Volume 4, Issue 1, pp. 74 (2002).

Physics

14

Scientific paper

A previously calculated universal pattern (Berry M V 2002 New J. Phys. 4 66) describes colours near an isolated phase singularity (diffraction zero), generated with white light and visible when the dark light of the singularity is scaled to isoluminance. Here the pattern is illustrated in several different situations: near the zeros of random and regular superpositions of plane waves, and near the zeros inside and outside the diffraction pattern decorating the geometrical cusp catastrophe. The universal colours emerge in miniature, close to the zeros, when an initially achromatic diffraction pattern is perturbed by switching on an asymptotic `chromaticity parameter', that can be chosen in several different ways.

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