Field enhancement in a chain of optically bound dipoles

Opt Express. 2006 Apr 3;14(7):3045-55. doi: 10.1364/oe.14.003045.


A one-dimensional array of dipoles, optically trapped and bound in a fringe, is considered. The coupling with the incident field is studied as a function of the number of interacting dipoles. This coupling exhibits an enhancement which collapses when the chain is too long. Two possibilities are explored to keep enhancement: shrinking the coherence and spatially phase modulating the trapping light.