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We have investigated the transmission dynamics of gold nanostructures in the femtosecond regime. We show the importance of electron relaxation at the Fermi level for the dynamical behavior of the nanostructures
Ultrafast nonlinear optical response is reported for Frenkel excitons in organic J-aggregate thin films, resonantly coupled to surface plasmons in gold nanoparticle arrays. We show that tuning the resonance wavelength of the surface plasmon of the arrays to the J-band of the surrounding cyanine dyes results in a strong enhancement of the optical nonlinearity
Periodic oscillations on a 100 fs time scale were observed in transient reflection measurements on gold films. A theoretical model attributes this behavior to ballistic electrons bouncing back and forth between the film boundaries
We have fabricated isolated, nanometer-sized "bowtie" metallic antennas and measured their resonant visible scattering spectra. Strong coupling is observed and is dependent on bowtie gap size, which can be qualitatively explained with multiple dipole interactions
We present spectrally resolved near-field transmission experiments on one-dimensional metallic photonic crystal slabs. The observed features depend on polarization and periodicity and are attributed to the excitation of waveguide modes or waveguide-plasmon polaritons
Photoluminescence continuum generation from semicontinuous silver and gold films was observed between 500 and 1050 nm, with efficiency much higher near the percolation threshold and with similar spectral dependence for the two metals
Single gold nanoparticle was attached to a single mode optical fiber tip by picking it up from the glass surface. Plasmon scattering from the absorbed nanoparticle was detected through the optical fiber in various solution environments
Efficiency of second-harmonic generation in arrays of anisotropic gold nanoparticles depends on array period. The effect is polarization-dependent, and we will discuss possible mechanisms behind the effect
Laser generated, highly collimated multi-MeV electron jets were used to induce nuclear reactions in high-Z materials like 197Au, 181Ta and in 129I. Applications of laser-induced nuclear reactions are presented
We have investigated the electromagnetic interaction of periodic arrays of metallic (gold) nanoparticles, composed of a pair of particles on each lattice site. By varying the interparticle separation from dielectric proximity to conductive contact on nm scale, we observe very large renormalization and splitting of the surface plasmon energy associated with an abrupt transition from the dipolar to...
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