Abstract
Recent theoretical and experimental studies have shed light on how optical trapping dynamics under femtosecond pulsed excitation are fine-tuned by optical and thermal nonlinearities. Here, we present experimental results of nonlinear optical trapping of single and multiple polystyrene beads (of 1 μm diameter). We show how integration and synchronization of bright-filed video microscopy with confocal detection of backscatter provide both spatial and temporal resolution required to capture intricate details of trapping dynamics. Such spatiotemporal detection is promising to have far-reaching applications in exploring controlled optical trapping and manipulations harnessed by optical and thermal nonlinearities.
The research results of the characteristics of magneto-inductive thickness gauges measuring transducers using harmonic excitation currents for the case of inspecting electrically conductive coatings are presented, on the basis of which a transducing algorithm is proposed and described in detail, which involves pulsed excitation of a magnetic field and the use of the induced EMF area as a primary informative parameter when suppressing the influence of network and pulse noise, used in serial thickness gauges of metallic non-ferromagnetic coatings on ferromagnetic substrates.
Crucial to effective optical trapping is the ability to precisely control the nature of force/potential to be attractive or repulsive. The nature of particle being trapped is as important as...
Deciphering single- and multi-particle trapping dynamics under femtosecond pulsed excitation with simultaneous spatial and temporal resolution
