TY - JOUR
T1 - Symmetric Plasmonic Slot Waveguides with a Nonlinear Dielectric Core
T2 - Bifurcations, Size Effects, and Higher Order Modes
AU - Walasik, Wiktor
AU - Rodriguez, Alejandro
AU - Renversez, Gilles
N1 - Publisher Copyright:
© 2014, Springer Science+Business Media New York.
PY - 2014/2
Y1 - 2014/2
N2 - We study the nonlinear stationary waves propagating in metal slot waveguides with a Kerr-type dielectric core. We develop two independent semianalytical models to describe these waves in such waveguides. Using these models, we compute the dispersion curves for about ten first modes of a nonlinear slot waveguide. For symmetric wave- guides, we find symmetric, antisymmetric, and asymmetric higher order modes which are grouped in two families. In addition, we study the influence of the slot width on the first symmetric and asymmetric modes. We also show that the dispersion curve of the first asymmetric mode is invariant with respect to the slot width for high propagation constant values and we provide analytical approximations of this curve. Using realistic values for the optogeometric parameters of the structure, we are able to obtain the bifurcation at a realistic power.
AB - We study the nonlinear stationary waves propagating in metal slot waveguides with a Kerr-type dielectric core. We develop two independent semianalytical models to describe these waves in such waveguides. Using these models, we compute the dispersion curves for about ten first modes of a nonlinear slot waveguide. For symmetric wave- guides, we find symmetric, antisymmetric, and asymmetric higher order modes which are grouped in two families. In addition, we study the influence of the slot width on the first symmetric and asymmetric modes. We also show that the dispersion curve of the first asymmetric mode is invariant with respect to the slot width for high propagation constant values and we provide analytical approximations of this curve. Using realistic values for the optogeometric parameters of the structure, we are able to obtain the bifurcation at a realistic power.
KW - Bifurcation
KW - Kerr nonlinearity
KW - Nonlinear plasmonics
KW - Plasmon-soliton
KW - Semianalytical models
KW - Size effect
KW - Slot waveguide
KW - Spatial soliton
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U2 - 10.1007/s11468-014-9773-5
DO - 10.1007/s11468-014-9773-5
M3 - Article
AN - SCOPUS:85027936705
SN - 1557-1955
VL - 10
SP - 33
EP - 38
JO - Plasmonics
JF - Plasmonics
IS - 1
ER -