Effects of light polarization in near-resonant two-photon two-light beam ionization of spin-polarized alkalia atoms

Physica B+C ◽  
1980 ◽  
Vol 101 (2) ◽  
pp. 276-284 ◽  
Author(s):  
R. Parzyński
Keyword(s):  
Light Beam ◽  
Light Polarization ◽  
Two Photon ◽  
Spin Polarized

ROTATIONAL PROPERTIES OF MICRO-SLABS DRIVEN BY LINEARLY-POLARIZED LIGHT

2005 ◽  
Vol 14 (03) ◽  
pp. 375-382 ◽  
Author(s):  
CHIH-LANG LIN ◽  
IRÈNE WANG ◽  
MARC PIERRE ◽  
ISABELLE COLOMBIER ◽  
CHANTAL ANDRAUD ◽  
...  
Keyword(s):  
Optical Tweezers ◽  
Polarized Light ◽  
Polarization Plane ◽  
Light Polarization ◽  
Good Prediction ◽  
Polarization Anisotropy ◽  
Two Photon ◽  
Flat Slabs ◽  
Linearly Polarized ◽  
Optical Torque

We study the rotational motion of objects trapped in a focused laser beam (optical tweezers). Micrometer-sized flat slabs are fabricated using two-photon photopolymerization. These objects, trapped by linearly-polarized light, tend to align parallel to the polarization plane. This alignment effect is attributed to the polarization anisotropy resulting from the object shape and we present a simple electromagnetic approach to estimate the resulting optical torque. Micro-rotors of different sizes are studied experimentally. We characterize the behavior of micro-objects when the light polarization is rotated at constant speed. Our theoretical approach gives a good prediction of how the size of micro-objects affects their rotation efficiency.

scholarly journals Light polarization and the Brewster law

2021 ◽  
Author(s):  
A.P. Pylaev
Keyword(s):  
Light Beam ◽  
Relative Intensity ◽  
Incident Beam ◽  
Light Polarization ◽  
Beam Wave ◽  
Wave Trains ◽  
The Law

It was obtained an analytical dependance of the relative intensity of the light beam reflected from the boundary of two transparent bodies expressing the law been established experimentally by Brewster. It was found on basis of comparison of the values of parallel and perpendicular components of the electrical vectors of the incident beam wave trains to the direction of the reflected beam.

scholarly journals Effects of excitation light polarization on fluorescence emission in two-photon light-sheet microscopy

2020 ◽  
Vol 11 (8) ◽  
pp. 4651
Author(s):  
Giuseppe de Vito ◽  
Pietro Ricci ◽  
Lapo Turrini ◽  
Vladislav Gavryusev ◽  
Caroline Müllenbroich ◽  
...  
Keyword(s):  
Fluorescence Emission ◽  
Light Sheet ◽  
Light Polarization ◽  
Excitation Light ◽  
Two Photon ◽  
Light Sheet Microscopy

Two-Photon Fluorescence Polarization Anisotropy Decay on Highly Diluted Solutions by Phase Fluorometry

2001 ◽  
Vol 55 (3) ◽  
pp. 311-317 ◽  
Author(s):  
Francesca Olivini ◽  
Sabrina Beretta ◽  
Giuseppe Chirico
Keyword(s):  
Fluorescence Polarization ◽  
Light Polarization ◽  
Correlation Spectroscopy ◽  
Polarization Anisotropy ◽  
Two Photon ◽  
Protein Size ◽  
High Dilutions ◽  
Fluorescence Polarization Anisotropy ◽  
Two Photon Fluorescence ◽  
Photon Fluorescence

We report here the phase-sensitive measurements of two-photon fluorescence polarization anisotropy (FPA) on highly diluted solutions. We first describe the characterization of the response of the two-photon microscope to the light polarization and its test by means of measurements of the FPA on rhodamine 6G as a function of the viscosity. Further, we report the study of the FPA at high dilutions on a globular protein, the beta-lactoglobulin B (BLG) labeled with Alexa 532. The number of molecules (from 0.4 to 17 molecules per excitation volume) is measured by means of fluorescence correlation spectroscopy (FCS). The average rotational and translational diffusion coefficients measured with the FPA and FCS methods are in good agreement with the protein size and do not show a substantial dependence on the protein concentration, despite the very low signal (≌3 times the background) observed for highly diluted solutions.

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