Quantitative optical trapping and optical manipulation of micro-sized objects
Journal Title: Semiconductor Physics, Quantum Electronics and Optoelectronics - Year 2017, Vol 20, Issue 3
Abstract
An optical tweezers technique is used for ultraprecise micromanipulation to measure positions of micrometer scale objects with a precision down to the nanometer scale. It consists of a high performance research microscope with motorized scanning stage and sensitive position detection system. Up to 10 traps can be used quasi-simultaneously. Non photodamage optical trapping of Escherichia coli (E. coli) bacteria cells of 2 µm in length, as an example of motile bacteria, has been shown in this paper. Also, efficient optical trapping and rotation of polystyrene latex particles of 3 µm in diameter have been studied, as an optical handle for the pick and place of other tiny objects. A fast galvoscanner is used to produce multiple optical traps for manipulation of micro-sized objects and optical forces of these trapped objects quantified and measured according to explanation of ray optics regime. The diameter of trapped particle is bigger than the wavelength of the trapping laser light. The force constant (k) has been determined in real time from the positional time series recorded from the trapped object that is monitored by a CCD camera through a personal computer.
Authors and Affiliations
Rania Sayed
Keywords
Related Articles
- EP ID EP232883
- DOI 10.15407/spqeo20.03.349
- Views 106
- Downloads 0
The non-linear dependence of 6СНВТ liquid crystal conductivity on the concentration of gold nanoparticles
Within the frequency range 10–1…106 Hz at the temperature 293 K, the effect of gold nanoparticles on the dielectric properties of the planar-oriented nematic liquid crystal 6СНВТ has been studied. The concentration of na...
Structural and optical studies of Cu6PSe5I-based thin film deposited by magnetron sputtering
Cu5.5P1.2Se5.0I1.3 thin film was deposited onto silicate glass substrate by non-reactive radio frequency magnetron sputtering. Structural studies were carried out using X-ray diffraction and SEM techniques. Spectrometric...
Designing and manufacturing aspherical polystyrene lenses for the terahertz region
We report on the development of lenses for terahertz vision systems from their design up to manufacturing. Fused deposition modeling was used for assisting the 3D printing manufacturing process. HIP (High Impact Polystyr...
Dielectric spectroscopy of CuInSe2 single crystals
The results of high-frequency dielectric measurements with obtained α-CuInSe2 single crystals provided an opportunity to determine the mechanisms of dielectric losses and charge transport, and also to evaluate the densit...
Large polycrystalline optical germanium Ge:Na plates with improved optical parameters and their application
It has been experimentally shown that transmission and scattering of IR radiation by Na-doped соarse-grained large germanium plates are the same as of Ge:Na single crystals and exceeds the parameters in the commonly used...