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.
Ortega, A.B., Torres-Gonzalez, F.E., Gayou, V.L., Macuil, R.D., Assanto, G., & Volke-Sepulveda, K. (2021). Light confinement with structured beams in gold nanoparticle suspensions. PHOTONICS, 8(6), 221 [10.3390/photonics8060221].
Titolo: | Light confinement with structured beams in gold nanoparticle suspensions | |
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Data di pubblicazione: | 2021 | |
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Citazione: | Ortega, A.B., Torres-Gonzalez, F.E., Gayou, V.L., Macuil, R.D., Assanto, G., & Volke-Sepulveda, K. (2021). Light confinement with structured beams in gold nanoparticle suspensions. PHOTONICS, 8(6), 221 [10.3390/photonics8060221]. | |
Handle: | http://hdl.handle.net/11590/390392 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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