Nonlocal ponderomotive nonlinearity in plasmonics.
We analyze an inherent nonlinearity of surface plasmon polaritons at the interface of Fermi-Dirac metal plasma, stemming from the depletion of electron density in high-intensity regions. The derived optical nonlinear coefficients are comparable with the experimental values for metals. We calculate the dispersion relations for the nonlinear propagation of high-intensity surface plasmon polaritons, predicting a nonlinearity-induced cutoff and vanishing group velocity.
Ginzburg
Pavel
P
Department of Electrical Engineering, Technion, Haifa 32000, Israel. gpasha@tx.technion.ac.il
Hayat
Alex
A
Berkovitch
Nikolai
N
Orenstein
Meir
M