We carry out an experimental campaign to investigate the nonlinear self-defocusing propagation of singular light beams with various complex structures of phase and intensity in a colloidal suspension of gold nanoparticles with a plasmonic resonance near the laser wavelength (532 nm). Studying optical vortices embedded in Gaussian beams, Bessel vortices and Bessel-cosine (necklace) beams, we gather evidence that while intense vortices turn into two-dimensional dark solitons, all structured wavepackets are able to guide a weak Gaussian probe of different wavelength (632.8 nm) along the dark core. The probe confinement also depends on the topological charge of the singular pump
Plasmonic nanoparticles, typically gold and silver colloids, can be trapped by a highly focused Gaus...
We study wave propagation in a two-dimensional photonic lattice with focusing Kerr nonlinearity, and...
We describe both theoretically and experimentally the existence and excitation of confined modes in ...
We carry out an experimental campaign to investigate the nonlinear self-defocusing propagation of si...
We investigate the nonlinear propagation of light beams with complex phase and intensity structures,...
We demonstrate two different types of coupled beam propagation dynamics in colloidal gold nanosuspen...
We study nonlinear propagation of light in colloidal suspension of metallic nanoparticles, in the re...
Robust propagation of self-trapped light over distances exceeding 25 diffraction lengths has been de...
The study of metal nanoparticles plays a central role in the emerging novel technologies employing o...
It has been conjectured for some time that colloidal suspensions can act as artificial self-guiding ...
In the past decade, the development of artificial materials exhibiting novel optical properties has ...
Aqueous suspensions containing pure gold nanoparticles and silica-gold core-shells are shown to exhi...
The self-structuring of laser light in an artificial optical medium composed of a colloidal suspensi...
Optical vortices are phase singularities in electromagnetic waves that constitute a unique and fasci...
We report the transport and trapping behavior of 100 and 500 nm diameter nanospheres in a plasmon-en...
Plasmonic nanoparticles, typically gold and silver colloids, can be trapped by a highly focused Gaus...
We study wave propagation in a two-dimensional photonic lattice with focusing Kerr nonlinearity, and...
We describe both theoretically and experimentally the existence and excitation of confined modes in ...
We carry out an experimental campaign to investigate the nonlinear self-defocusing propagation of si...
We investigate the nonlinear propagation of light beams with complex phase and intensity structures,...
We demonstrate two different types of coupled beam propagation dynamics in colloidal gold nanosuspen...
We study nonlinear propagation of light in colloidal suspension of metallic nanoparticles, in the re...
Robust propagation of self-trapped light over distances exceeding 25 diffraction lengths has been de...
The study of metal nanoparticles plays a central role in the emerging novel technologies employing o...
It has been conjectured for some time that colloidal suspensions can act as artificial self-guiding ...
In the past decade, the development of artificial materials exhibiting novel optical properties has ...
Aqueous suspensions containing pure gold nanoparticles and silica-gold core-shells are shown to exhi...
The self-structuring of laser light in an artificial optical medium composed of a colloidal suspensi...
Optical vortices are phase singularities in electromagnetic waves that constitute a unique and fasci...
We report the transport and trapping behavior of 100 and 500 nm diameter nanospheres in a plasmon-en...
Plasmonic nanoparticles, typically gold and silver colloids, can be trapped by a highly focused Gaus...
We study wave propagation in a two-dimensional photonic lattice with focusing Kerr nonlinearity, and...
We describe both theoretically and experimentally the existence and excitation of confined modes in ...