182 research outputs found
Metal nanoparticles with sharp corners: Universal properties of plasmon resonances
We predict the simultaneous occurrence of two fundamental phenomena for metal
nanoparticles possessing sharp corners: First, the main plasmonic dipolar mode
experiences strong red shift with decreasing corner curvature radius; its
resonant frequency is controlled by the apex angle of the corner and the
normalized (to the particle size) corner curvature. Second, the split-off
plasmonic mode experiences strong localization at the corners. Altogether, this
paves the way for tailoring of metal nano-structures providing
wavelength-selective excitation of localized plasmons and a strong near-field
enhancement of linear and nonlinear optical phenomena
Chirped dissipative solitons of the complex cubic-quintic nonlinear Ginzburg-Landau equation
Approximate analytical chirped solitary pulse (chirped dissipative soliton)
solutions of the one-dimensional complex cubic-quintic nonlinear
Ginzburg-Landau equation are obtained. These solutions are stable and
highly-accurate under condition of domination of a normal dispersion over a
spectral dissipation. The parametric space of the solitons is
three-dimensional, that makes theirs to be easily traceable within a whole
range of the equation parameters. Scaling properties of the chirped dissipative
solitons are highly interesting for applications in the field of high-energy
ultrafast laser physics.Comment: 20 pages, 12 figures, the mathematical apparatus is presented in
detail in http://info.tuwien.ac.at/kalashnikov/NCGLE2.htm
- …