Coherently tunable third-order nonlinearity in a nanojunction
Vadim A. Markel
Abstract
A possibility of tuning the phase of the third-order Kerr-type nonlinear susceptibility in a system consisting of two interacting metal nanospheres and a nonlinearly polarizable molecule is investigated theoretically and numerically. It is shown that by varying the relative inter-sphere separation, it is possible to tune the phase of the effective nonlinear susceptibility χ(3)(ω;ω,ω,-ω) in the whole range from 0 to 2π$.
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