TY - JOUR
T1 - Guiding light with singular beams in nanoplasmonic colloids
AU - Balbuena Ortega, A.
AU - Torres-González, F. E.
AU - López Gayou, V.
AU - Delgado Macuil, R.
AU - Cardoso Sakamoto, J. E.H.
AU - Arzola, A. V.
AU - Assanto, G.
AU - Volke-Sepulveda, K.
N1 - Publisher Copyright:
© 2021 Author(s).
PY - 2021/2/8
Y1 - 2021/2/8
N2 - We investigate the nonlinear propagation of light beams with complex phase and intensity structures, including a Gaussian-embedded vortex, a Bessel vortex, and a Bessel-cosine necklace. We employ a colloidal suspension of bio-synthesized plasmonic gold nanoparticles, where a self-defocusing response is mediated by absorption at the laser wavelength (532 nm). We show that, by means of nonlocal nonlinearity, these structured two-dimensional beams with on-axis singularity can counteract the diffraction of the dark core and guide therein a coaxial Gaussian probe of different wavelengths (633 nm) and lower intensities. Angular steering of the confined probe is also demonstrated by tilting the propagation direction of the pump.
AB - We investigate the nonlinear propagation of light beams with complex phase and intensity structures, including a Gaussian-embedded vortex, a Bessel vortex, and a Bessel-cosine necklace. We employ a colloidal suspension of bio-synthesized plasmonic gold nanoparticles, where a self-defocusing response is mediated by absorption at the laser wavelength (532 nm). We show that, by means of nonlocal nonlinearity, these structured two-dimensional beams with on-axis singularity can counteract the diffraction of the dark core and guide therein a coaxial Gaussian probe of different wavelengths (633 nm) and lower intensities. Angular steering of the confined probe is also demonstrated by tilting the propagation direction of the pump.
UR - http://www.scopus.com/inward/record.url?scp=85101455075&partnerID=8YFLogxK
U2 - 10.1063/5.0041198
DO - 10.1063/5.0041198
M3 - Artículo
AN - SCOPUS:85101455075
SN - 0003-6951
VL - 118
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 6
M1 - 061102
ER -