Coherent light beating scattering (CLBS) for size and velocity control

Anatoly T. Sukhodolsky

doi:10.1117/12.341430

4 March 1999 Coherent light beating scattering (CLBS) for size and velocity control

Anatoly T. Sukhodolsky

Proceedings Volume 3726, Saratov Fall Meeting '98: Light Scattering Technologies for Mechanics, Biomedicine, and Material Science; (1999) https://doi.org/10.1117/12.341430
Event: Saratov Fall Meeting '98: Light Scattering Technologies for Mechanics, Biomedicine, and Material Science, 1998, Saratov, Russian Federation

Abstract

An introduction into the elements of diffraction theory of coherent scattering of vector waves for size and velocity measurements is proposed to discuss. In traditional approach, a square-law detector is to observe beating in optical signal consists of two components: scattered and not-scattered scalar waves. The basis of proposed metrology is beating of two scattered coherent vector waves with variable states of their vectors of polarization (Coherent Light Beating Scattering (CLBS)) on a photodetector. Vectorial optical signal of CLBS is considered in framework of Fraunhofer diffraction of two plane vector waves by a single particle in case of periodical modulation of vector of polarization described as Jones vector. The formalism of Jones matrix is proposed to describe CLBS by a distribution of particles to control their sizes and velocities. A portable CLBS-spectrometer for size and motility application in biology is described. In traditional spectroscopy of optical beating, a particle alone provides with one scattered component of scalar wave to mix with a narrow-band reference wave on a square-law photodetector. As a result, a community of particles in motion gives fluctuation of intensity available for next spectral analysis of electrical signal. On the contrast, by CLBS, a single particle is to form two vectorial scattered coherent components to beat on a photodetector that joints beating and scattering as the basis for the new active control of a distribution of particles with the principal possibility of simultaneous k- spectroscopy of sizes and (omega) -spectroscopy of velocities. The CLBS-spectrum of alive Dunaliella is presented as a first example to develop a new optical standard to measure bioactivity.

Citation Download Citation

Anatoly T. Sukhodolsky "Coherent light beating scattering (CLBS) for size and velocity control", Proc. SPIE 3726, Saratov Fall Meeting '98: Light Scattering Technologies for Mechanics, Biomedicine, and Material Science, (4 March 1999); https://doi.org/10.1117/12.341430

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