2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/95583A 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 $2π$.10 pages 5 figuresOpticstext