29 research outputs found
Two-color laser manipulation of single organic molecules based on nonlinear optical response
We theoretically propose two-color laser manipulation with greatly improved efficiency to mechanically manipulate single organic molecules. The present method is based on the nonlinear resonant laser manipulation proposed in a recent study. In the first part, we describe a method to trap single organic molecules that can be more effective than ever before utilizing two-color beams. In the second part, we demonstrate the possibility to selectively βpullβ single organic molecules with a particular type of electronic-level scheme by using single-side illumination of traveling light
A Single Large Assembly with Dynamically Fluctuating Swarms of Gold Nanoparticles Formed by Trapping Laser
Laser
trapping has been utilized as tweezers to three-dimensionally
trap nanoscale objects and has provided significant impacts in nanoscience
and nanotechnology. The objects are immobilized at the position where
the tightly focused laser beam is irradiated. Here, we report the
swarming of gold nanoparticles in which component nanoparticles dynamically
interact with each other, keeping their long interparticle distance
around the trapping laser focus at a glass/solution interface. A pair
of swarms are directionally extended outside the focal spot perpendicular
to the linear polarization like a radiation pattern of dipole scattering,
while a doughnut-shaped swarm is prepared by circularly polarized
trapping laser. The light field is expanded as scattered light through
trapped nanoparticles; this modified light field further traps the
nanoparticles, and scattering and trapping cooperatively develop.
Due to these nonlinear dynamic processes, the dynamically fluctuating
swarms are evolved up to tens of micrometers. This finding will open
the way to create various swarms of nanoscale objects that interact
and bind through the scattered light depending on the properties of
the laser beam and the nanomaterials
A Single Large Assembly with Dynamically Fluctuating Swarms of Gold Nanoparticles Formed by Trapping Laser
Laser
trapping has been utilized as tweezers to three-dimensionally
trap nanoscale objects and has provided significant impacts in nanoscience
and nanotechnology. The objects are immobilized at the position where
the tightly focused laser beam is irradiated. Here, we report the
swarming of gold nanoparticles in which component nanoparticles dynamically
interact with each other, keeping their long interparticle distance
around the trapping laser focus at a glass/solution interface. A pair
of swarms are directionally extended outside the focal spot perpendicular
to the linear polarization like a radiation pattern of dipole scattering,
while a doughnut-shaped swarm is prepared by circularly polarized
trapping laser. The light field is expanded as scattered light through
trapped nanoparticles; this modified light field further traps the
nanoparticles, and scattering and trapping cooperatively develop.
Due to these nonlinear dynamic processes, the dynamically fluctuating
swarms are evolved up to tens of micrometers. This finding will open
the way to create various swarms of nanoscale objects that interact
and bind through the scattered light depending on the properties of
the laser beam and the nanomaterials
A Single Large Assembly with Dynamically Fluctuating Swarms of Gold Nanoparticles Formed by Trapping Laser
Laser
trapping has been utilized as tweezers to three-dimensionally
trap nanoscale objects and has provided significant impacts in nanoscience
and nanotechnology. The objects are immobilized at the position where
the tightly focused laser beam is irradiated. Here, we report the
swarming of gold nanoparticles in which component nanoparticles dynamically
interact with each other, keeping their long interparticle distance
around the trapping laser focus at a glass/solution interface. A pair
of swarms are directionally extended outside the focal spot perpendicular
to the linear polarization like a radiation pattern of dipole scattering,
while a doughnut-shaped swarm is prepared by circularly polarized
trapping laser. The light field is expanded as scattered light through
trapped nanoparticles; this modified light field further traps the
nanoparticles, and scattering and trapping cooperatively develop.
Due to these nonlinear dynamic processes, the dynamically fluctuating
swarms are evolved up to tens of micrometers. This finding will open
the way to create various swarms of nanoscale objects that interact
and bind through the scattered light depending on the properties of
the laser beam and the nanomaterials
A Single Large Assembly with Dynamically Fluctuating Swarms of Gold Nanoparticles Formed by Trapping Laser
Laser
trapping has been utilized as tweezers to three-dimensionally
trap nanoscale objects and has provided significant impacts in nanoscience
and nanotechnology. The objects are immobilized at the position where
the tightly focused laser beam is irradiated. Here, we report the
swarming of gold nanoparticles in which component nanoparticles dynamically
interact with each other, keeping their long interparticle distance
around the trapping laser focus at a glass/solution interface. A pair
of swarms are directionally extended outside the focal spot perpendicular
to the linear polarization like a radiation pattern of dipole scattering,
while a doughnut-shaped swarm is prepared by circularly polarized
trapping laser. The light field is expanded as scattered light through
trapped nanoparticles; this modified light field further traps the
nanoparticles, and scattering and trapping cooperatively develop.
Due to these nonlinear dynamic processes, the dynamically fluctuating
swarms are evolved up to tens of micrometers. This finding will open
the way to create various swarms of nanoscale objects that interact
and bind through the scattered light depending on the properties of
the laser beam and the nanomaterials
A Single Large Assembly with Dynamically Fluctuating Swarms of Gold Nanoparticles Formed by Trapping Laser
Laser
trapping has been utilized as tweezers to three-dimensionally
trap nanoscale objects and has provided significant impacts in nanoscience
and nanotechnology. The objects are immobilized at the position where
the tightly focused laser beam is irradiated. Here, we report the
swarming of gold nanoparticles in which component nanoparticles dynamically
interact with each other, keeping their long interparticle distance
around the trapping laser focus at a glass/solution interface. A pair
of swarms are directionally extended outside the focal spot perpendicular
to the linear polarization like a radiation pattern of dipole scattering,
while a doughnut-shaped swarm is prepared by circularly polarized
trapping laser. The light field is expanded as scattered light through
trapped nanoparticles; this modified light field further traps the
nanoparticles, and scattering and trapping cooperatively develop.
Due to these nonlinear dynamic processes, the dynamically fluctuating
swarms are evolved up to tens of micrometers. This finding will open
the way to create various swarms of nanoscale objects that interact
and bind through the scattered light depending on the properties of
the laser beam and the nanomaterials
A Single Large Assembly with Dynamically Fluctuating Swarms of Gold Nanoparticles Formed by Trapping Laser
Laser
trapping has been utilized as tweezers to three-dimensionally
trap nanoscale objects and has provided significant impacts in nanoscience
and nanotechnology. The objects are immobilized at the position where
the tightly focused laser beam is irradiated. Here, we report the
swarming of gold nanoparticles in which component nanoparticles dynamically
interact with each other, keeping their long interparticle distance
around the trapping laser focus at a glass/solution interface. A pair
of swarms are directionally extended outside the focal spot perpendicular
to the linear polarization like a radiation pattern of dipole scattering,
while a doughnut-shaped swarm is prepared by circularly polarized
trapping laser. The light field is expanded as scattered light through
trapped nanoparticles; this modified light field further traps the
nanoparticles, and scattering and trapping cooperatively develop.
Due to these nonlinear dynamic processes, the dynamically fluctuating
swarms are evolved up to tens of micrometers. This finding will open
the way to create various swarms of nanoscale objects that interact
and bind through the scattered light depending on the properties of
the laser beam and the nanomaterials