TY - JOUR
T1 - Optical binding via surface plasmon polariton interference
AU - Kostina, Natalia
AU - Petrov, Mihail
AU - Ivinskaya, Aliaksandra
AU - Sukhov, Sergey
AU - Bogdanov, Andrey
AU - Toftul, Ivan
AU - Nieto-Vesperinas, Manuel
AU - Ginzburg, Pavel
AU - Shalin, Alexander
N1 - Publisher Copyright: © 2019 American Physical Society.
PY - 2019/3/13
Y1 - 2019/3/13
N2 - Optical binding allows creation of mechanically stable nanoparticle configurations owing to formation of self-consistent optical trapping potentials. While the classical diffraction limit prevents achieving deeply subwavelength arrangements, auxiliary nanostructures enable tailoring optical forces via additional interaction channels. Here, a dimer configuration next to a metal surface was analyzed in detail and the contribution of surface plasmon polariton waves was found to govern the interaction dynamics. It is shown that the interaction channel, mediated by resonant surface waves, enables achieving subwavelength stable dimers. Furthermore, the vectorial structure of surface modes allows binding between two dipole nanoparticles along the direction of their dipole moments, contrary to vacuum binding, where a stable configuration is formed in the direction perpendicular to the polarization of the dipole moments. In addition, the enhancement by one order of magnitude of the optical binding stiffness is predicted owing to the surface plasmon polariton interaction channel. These phenomena pave the way for developing new flexible optical manipulators, allowing for control over a nanoparticle trajectory on subwavelength scales and opening opportunities for optical-induced anisotropic (i.e., with different periods along the field polarization as well as perpendicular to it) organization of particles on a plasmonic substrate.
AB - Optical binding allows creation of mechanically stable nanoparticle configurations owing to formation of self-consistent optical trapping potentials. While the classical diffraction limit prevents achieving deeply subwavelength arrangements, auxiliary nanostructures enable tailoring optical forces via additional interaction channels. Here, a dimer configuration next to a metal surface was analyzed in detail and the contribution of surface plasmon polariton waves was found to govern the interaction dynamics. It is shown that the interaction channel, mediated by resonant surface waves, enables achieving subwavelength stable dimers. Furthermore, the vectorial structure of surface modes allows binding between two dipole nanoparticles along the direction of their dipole moments, contrary to vacuum binding, where a stable configuration is formed in the direction perpendicular to the polarization of the dipole moments. In addition, the enhancement by one order of magnitude of the optical binding stiffness is predicted owing to the surface plasmon polariton interaction channel. These phenomena pave the way for developing new flexible optical manipulators, allowing for control over a nanoparticle trajectory on subwavelength scales and opening opportunities for optical-induced anisotropic (i.e., with different periods along the field polarization as well as perpendicular to it) organization of particles on a plasmonic substrate.
UR - http://www.scopus.com/inward/record.url?scp=85063407170&partnerID=8YFLogxK
U2 - https://doi.org/10.1103/PhysRevB.99.125416
DO - https://doi.org/10.1103/PhysRevB.99.125416
M3 - مقالة
SN - 2469-9950
VL - 99
JO - Physical Review B
JF - Physical Review B
IS - 12
M1 - 125416
ER -