Singular-optical coloring of regularly scattered white light

Angelsky, Oleg V.; Polyanskii, Peter V.; Hanson, Steen Grüner

doi:10.1364/oe.14.007579

Cited by 51 publications

(23 citation statements)

References 23 publications

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“…It is conceived that micro-and nanoparticle manipulation would widen the application of correlation methods of analyzing fractal objects [26][27][28][29] , including objects of biological origin 30 .…”

Section: Resultsmentioning

confidence: 99%

Circular motion of particles by the help of the spin part of the internal energy flow

et al. 2013

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Non-spherical dielectric microparticles were suspended in the water-filled cell and exposed to the coherent Gaussian light beam with switchable state of polarization. When the beam polarization is linear, the particles were trapped at certain off-axial position within the beam cross section. After switching to the right (left) circular polarization, the particles performed spinning motion in agreement with the angular momentum imparted by the field, but also they were involved in the orbital rotation around the beam axis, which in previous works [Y. Zhao et al, Phys. Rev. Lett. 99, 073901 (2007)] was treated as an evidence for the spin-to orbital angular momentum conversion. Since in our situation the moderate focusing of the beam excluded possibility of such a conversion, we treat the observed particle behaviour as a demonstration of the macroscopic "spin energy flow" predicted by the theory of inhomogeneously polarized paraxial beams [A. Bekshaev et al, J. Opt. 13, 053001 (2011)].

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Section: Resultsmentioning

confidence: 99%

Circular motion of particles by the help of the spin part of the internal energy flow

et al. 2013

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“…Temporal fluctuations of intensity in a certain point of space are caused by dynamic light scattering. They carry information about the investigated dynamic light scattering medium [7][8][9][10][11] .…”

Section: Introductionmentioning

confidence: 99%

The correlation-optical method measuring time of thrombus formation

Gavrylyak

Grygoryshyn

2013

SPIE Proceedings

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The method of laser express diagnostics of thrombus formation process in a blood plasma is presented. This method is based on analysis of image correlation of blood plasma during thrombus formation process. The technique of experimental researches of scattering laser radiation by blood plasma is shown. It is established that the dynamic of intensity fluctuations of radiation of scattered by blood plasma decreases under the influence of thrombin that causes increasing correlation coefficient and gives the possibility to estimate continuance of thrombus formation process. It was discovered that time of thrombus formation of healthy people is smaller than of asthmatics.

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“…Considering LC-P composite as a random phase screen these methods deal with a phase correlation function (PCF) of this screen. PCF contains information about scatter's shape and size 11,12 , i.e. about parameters of LC domains in case of LC-P composites.…”

Section: Introductionmentioning

confidence: 99%

Interference forming of transmission by polymer dispersed liquid crystals

Maksimyak

Nehrych

2013

Eleventh International Conference on Correlation Optics

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The methods of correlation optics are for the first time applied to study structure of liquid crystal (LC) -polymer (P) composites at various concentrations of LC and P. Their phase correlation function (PCF) was obtained considering LC-P composite as a random phase screen. The amplitude of PCF contains information about number of LC domains and structure of LC director inside of them, while a half-width of this function is connected with a size of these domains. We studied unpowered and powered composite layers with a thickness of 5 μm. As liquid crystal and polymer were used nematic LC E7 from Merck and photopolymer composition NOA65 from Norland. Concentration of polymer ϕ P was varied in a range 10-55 vol. %. In good agreement with previous studies by SEM technique we detected monotone decrease of LC domains with concentration of polymer. With application of electric field, amplitude of PCF behaves differently for the samples with different polymer content. For the samples with ϕ P >35 vol. % (samples having morphology of polymer dispersed LC), this dependence is monotonic. In turn, if ϕ P <35 vol. % (samples with polymer network LC morphology), the amplitude of PCF non-monotonically depends on the applied voltage going through a maximum. The latter fact is explained by transformation of orientational defects of LC phase with the applied voltage.

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Singular-optical coloring of regularly scattered white light

Cited by 51 publications

References 23 publications

Circular motion of particles by the help of the spin part of the internal energy flow

Circular motion of particles by the help of the spin part of the internal energy flow

The correlation-optical method measuring time of thrombus formation

Interference forming of transmission by polymer dispersed liquid crystals

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