| Autor: |
Balbuena Ortega, Argelia, Torres-González, Felix E., López Gayou, Valentin, Delgado Macuil, Raul, Assanto, Gaetano, Volke-Sepulveda, Karen |
| Předmět: |
|
| Zdroj: |
Photonics; Jun2021, Vol. 8 Issue 6, p221, 1p |
| Abstrakt: |
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 (532nm). 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
