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The vertical and horizontal polarization modes of a cavity QED system become correlated through a single atom. Their auto-correlation and cross-correlations show an avenue for the study of the steady state entanglement in this system.
We present a simple, compact, microfluidic system that easily facilitates diode laser bar optical trapping for cell stretching measurements and particle sorting within flowing microfluidic systems for the first time.
We report radiation force measurements to a precision of 100 femto-Newton using a high Q torsion balance oscillator. The opto-mechanically coupled oscillator can be cooled down to a temperature of 300 milli-Kelvin.
A nanometre scale, picoNewton force probe based on advanced optical tweezers control of transparent microstructures will be presented. The probe will be applied to dynamic bio-molecular interactions in solution
We investigate broad-band CARS spectroscopy in supercontinuum optical trap. Methods for suppressing or smoothing non-resonant background are demonstrated.
We describe optimization of frequency locked loop in atomic clock which is based on coherent population trapping in 87Rb-D2 transition. The clock performance was optimized to have an Allan deviation of 2.8middot10-11 at 1 sec.
We present a new scheme for trapping single atoms in separate dipole-traps and manipulating them individually. It relies on a spatial light-modulator to create the traps and will find applications in cavity-QED.
The fiber optical trap technique for depositing carbon nanotubes on fiber end-faces in modelocked lasers is experimentally characterized. Precise control of optical power and the temperature of carbon nanotubes solution are important in this technique.
We demonstrate strongly enhanced optical trapping forces on sub-micron-diameter dielectric spheres within a pressure-driven microfluidic flow of several hundred mum/s using the evanescent field of the light in silicon waveguides.
The Mie scattering of a Laguerre-Gaussian beam is studied. Applications to position detection in optical tweezers are considered. The cross-talk between the position signals predicted by simulations is confirmed in experiments.
We measure the femto-Newton forces produced by 2D surface plasmon optical traps able to trap micro-colloids at a patterned metal surface under low laser intensity.
We demonstrate that optical pulse compression can be realized by tuning the quality factor of an optical microcavity from a high value to a low value, with tuning time shorter than the photon lifetime.
We numerically analyze supercontinuum generation in a long length of tapered PCF to understand the soliton trapping dynamics leading to the enhanced Blue/UV supercontinuum recently achieved experimentally in such fibers.
Avalanche concentration, a rapid long-range accumulation of particles around a laser spot in a liquid sample, is demonstrated and characterized for VO2 nanorods. The effect is found to be driven by a convective flow in the sample, caused by efficient heating of VO2 nanorods that transition from insulator to metal within the laser spot.
Optical tweezers are typically used on transparent dielectric particles. Particles with optical resonances would experience larger trapping forces and allow trapping of smaller particles. We present a study of increased trapping forces on such particles.
We present a study of dipole-dipole interaction between silver nanowires trapped using optoelectronic tweezers. Measurement of the maximum repulsion force between nanowires and self-assembly of nanowires to achieve the lowest potential energy configuration are demonstrated.
Optoelectronic tweezers (OET) allow the control of micron-sized particles suspended in a liquid by controlling the dielectrophoretic force with the selective illumination of a photoconductor. High liquid conductivities give a negative force (away from illuminated areas) so that particles are trapped by illuminating a ring around them. This paper explores the force profile of these traps and shows...
We present plasmonic tweezers that makes use of localized surface plasmons from a close-packed Au nanoparticle (NP) array. This device is able to realize long-range trapping and orientation control of single nanorods with a very low optical intensity requirement.
We report on the kinetics of a low-temperature gas of indirect excitons in an optically-induced exciton trap. The loading time of excitons to the trap center is ~40 ns.
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