Light confinement with structured beams in gold nanoparticle suspensions

Argelia Balbuena Ortega; Felix E. Torres-González; Valentin López Gayou; Raul Delgado Macuil; Gaetano Assanto; Karen Volke-Sepulveda

doi:10.3390/photonics8060221

Light confinement with structured beams in gold nanoparticle suspensions

Argelia Balbuena Ortega, Felix E. Torres-González, Valentin López Gayou, Raul Delgado Macuil, Gaetano Assanto, Karen Volke-Sepulveda

Centro de Investigación en Biotecnología Aplicada (CIBA), Unidad Tlaxcala

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

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.

Original language	English
Article number	221
Journal	Photonics
Volume	8
Issue number	6
DOIs	https://doi.org/10.3390/photonics8060221
State	Published - Jun 2021

Keywords

All-optical effects
Dark solitons
Light self-localization
Light-induced waveguides
Nanocolloids
Nanoparticles
Nonlinear plasmonics
Nonlinear propagation
Opto-thermal effect
Singular optics
Soft-matter
Structured beams
Vortex beams

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10.3390/photonics8060221

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title = "Light confinement with structured beams in gold nanoparticle suspensions",

abstract = "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.",

keywords = "All-optical effects, Dark solitons, Light self-localization, Light-induced waveguides, Nanocolloids, Nanoparticles, Nonlinear plasmonics, Nonlinear propagation, Opto-thermal effect, Singular optics, Soft-matter, Structured beams, Vortex beams",

author = "Ortega, {Argelia Balbuena} and Torres-Gonz{\'a}lez, {Felix E.} and Gayou, {Valentin L{\'o}pez} and Macuil, {Raul Delgado} and Gaetano Assanto and Karen Volke-Sepulveda",

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doi = "10.3390/photonics8060221",

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T1 - Light confinement with structured beams in gold nanoparticle suspensions

AU - Ortega, Argelia Balbuena

AU - Torres-González, Felix E.

AU - Gayou, Valentin López

AU - Macuil, Raul Delgado

AU - Assanto, Gaetano

AU - Volke-Sepulveda, Karen

PY - 2021/6

Y1 - 2021/6

N2 - 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.

AB - 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.

KW - All-optical effects

KW - Dark solitons

KW - Light self-localization

KW - Light-induced waveguides

KW - Nanocolloids

KW - Nanoparticles

KW - Nonlinear plasmonics

KW - Nonlinear propagation

KW - Opto-thermal effect

KW - Singular optics

KW - Soft-matter

KW - Structured beams

KW - Vortex beams

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DO - 10.3390/photonics8060221

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SN - 2304-6732

VL - 8

JO - Photonics

JF - Photonics

IS - 6

M1 - 221

ER -

Light confinement with structured beams in gold nanoparticle suspensions

Abstract

Keywords

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