scholarly journals Thin Light Tube Formation by Tightly Focused Azimuthally Polarized Light Beams

ISRN Optics ◽  
2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Svetlana N. Khonina ◽  
Andrey V. Ustinov
Keyword(s):  
Numerical Aperture ◽  
Polarized Light ◽  
Transmission Function ◽  
Tube Formation ◽  
Destructive Interference ◽  
Circular Aperture ◽  
Theoretical And Numerical Analysis ◽  
Diffractive Axicon ◽  
Aperture Diffraction ◽  
Light Beams

Theoretical and numerical analysis of the transmission function of the focusing system with high numerical aperture was conducted. The purpose of the study was to form a thin light tube in a focal area using the azimuthally polarized radiation. It was analytically shown that, due to destructive interference of two beams formed by two narrow rings, it is possible to overcome not only the full aperture diffraction limit but also the circular aperture limit. In this case, however, the intensity at the center of the focal plane is significantly reduced, which practically leads to the tube rupture. It was numerically shown that long thin one-piece tubes may be formed through the aperture apodization with diffractive axicon phase function or with complex transmission function of Laguerre-Gaussian or Airy-Gaussian beams.

On resolving fine periodic microstructures in the optical microscope

1989 ◽  
Vol 47 ◽  
pp. 364-365
Author(s):  
W.S. Putnam ◽  
C. Viney
Keyword(s):  
Liquid Crystalline ◽  
Numerical Aperture ◽  
Polarized Light ◽  
Normal Incidence ◽  
Optical Microscope ◽  
Angle Of Incidence ◽  
Resolution Limit ◽  
Crystalline Materials ◽  
Periodic Microstructures ◽  
Liquid Crystalline Materials

Many sheared liquid crystalline materials (fibers, films and moldings) exhibit a fine banded microstructure when observed in the polarized light microscope. In some cases, for example Kevlar® fiber, the periodicity is close to the resolution limit of even the highest numerical aperture objectives. The periodic microstructure reflects a non-uniform alignment of the constituent molecules, and consequently is an indication that the mechanical properties will be less than optimal. Thus it is necessary to obtain quality micrographs for characterization, which in turn requires that fine detail should contribute significantly to image formation.It is textbook knowledge that the resolution achievable with a given microscope objective (numerical aperture NA) and a given wavelength of light (λ) increases as the angle of incidence of light at the specimen surface is increased. Stated in terms of the Abbe resolution criterion, resolution improves from λ/NA to λ/2NA with increasing departure from normal incidence.

scholarly journals Radially polarized light beams from spin-forbidden dark excitons and trions in monolayer WSe2

2020 ◽  
Vol 10 (5) ◽  
pp. 1273
Author(s):  
Sven Borghardt ◽  
Jens Sonntag ◽  
Jhih-Sian Tu ◽  
Takashi Taniguchi ◽  
Kenji Watanabe ◽  
...  
Keyword(s):  
Polarized Light ◽  
Light Beams ◽  
Radially Polarized ◽  
Radially Polarized Light

Self-focusing of two orthogonally polarized light beams in a nonlinear medium

1993 ◽  
Vol 25 (2) ◽  
pp. 97-104 ◽  
Author(s):  
A. M. Goncharenko ◽  
V. G. Kukushkin ◽  
Yu. A. Logvin ◽  
A. M. Samson
Keyword(s):  
Nonlinear Medium ◽  
Polarized Light ◽  
Self Focusing ◽  
Light Beams

Production of arbitrary polarized light beams with a liquid crystal spatial modulator

2016 ◽  
Author(s):  
Ignacio Moreno ◽  
Maria M. Sánchez-López ◽  
Jeffrey A. Davis ◽  
Katherine Badham ◽  
Don M. Cottrell
Keyword(s):  
Liquid Crystal ◽  
Polarized Light ◽  
Light Beams

Applications of a holographic system with mutually incoherent polarized light beams

2004 ◽  
Author(s):  
Salvador Guel-Sandoval ◽  
L. R. Berriel-Valdos ◽  
A. V. Zamora-Gomez
Keyword(s):  
Polarized Light ◽  
Light Beams

SPATIAL SEPARATION OF POLARIZATION COMPONENTS BY NONLINEAR BEAM RESHAPING IN A J=1 TO J=0 MEDIUM

1992 ◽  
Vol 01 (02) ◽  
pp. 393-420 ◽  
Author(s):  
R.J. BALLAGH ◽  
A.W. McCORD
Keyword(s):  
Optical Pumping ◽  
Polarized Light ◽  
Spatial Separation ◽  
Longitudinal Optical ◽  
Zero Field ◽  
Nonlinear Beam ◽  
Circularly Polarized Light ◽  
Polarized Beam ◽  
Light Beams ◽  
Elliptically Polarized

The diffractive reshaping that circularly polarized light beams undergo when coupled in a medium of homogenously broadened J=1→J=0 atoms is shown to be sensitively dependent on applied magnetic fields. In zero field, an elliptically polarized beam will retain its polarization everywhere in space, but a small longitudinal magnetic field can cause the beam to break up into spatially distinct regions of pure circular polarization. The beam behavior can be understood in terms of an encoding/diffraction sequence. An analytic solution for the atomic response function reveals the important roles played by transverse and longitudinal optical pumping.

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