The Analysis of the Experiment of Polarized Light in Uniaxial Dichroism Crystal

2013 ◽  
Vol 300-301 ◽  
pp. 1267-1270
Author(s):  
Nan Yang Ye ◽  
Da Hai Han
Keyword(s):  
Distribution Function ◽  
Light Intensity ◽  
Intensity Distribution ◽  
Polarized Light ◽  
Light Intensity Distribution ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Elliptically Polarized Light ◽  
Polarization Of Light ◽  
Elliptically Polarized

In the experiment of the polarization of light, circularly polarized light can’t be got though all instruments are carefully adjusted and the polarized light we get is generally regarded as elliptically polarized light. We analyzed the process and find the light we get isn’t circularly polarized light or elliptically polarized light as usually thought and deduced the light intensity distribution function and it can fit the experimental results with small errors.

Chiroptical Molecular Memory of Amorphous Azopolymer using Light Handedness

2001 ◽  
Vol 674 ◽  
Author(s):  
Mi Jeong Kim ◽  
Dong-Yu Kim
Keyword(s):  
Polymer Film ◽  
Amorphous Polymer ◽  
Polarized Light ◽  
Amorphous Film ◽  
Memory System ◽  
Molecular Memory ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Elliptically Polarized Light ◽  
Elliptically Polarized

ABSTRACTFor chirooptic molecular memory system, induced chirality on an azobenzene-containing amorphous polymer film was investigated using circularly polarized Ar+ laser with various ellipticity. High intense CD spectrum proved that optical-induced chirality on the amorphous film. Additionally, elliptically polarized light induced much higher chirality than circularly polarized light.

scholarly journals Patterns and properties of polarized light in air and water

2011 ◽  
Vol 366 (1565) ◽  
pp. 619-626 ◽  
Author(s):  
Thomas W. Cronin ◽  
Justin Marshall
Keyword(s):  
Polarized Light ◽  
Natural Scenes ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Current State ◽  
Visual Systems ◽  
The Earth ◽  
Predictable Pattern ◽  
Linearly Polarized ◽  
Polarization Of Light

Natural sources of light are at best weakly polarized, but polarization of light is common in natural scenes in the atmosphere, on the surface of the Earth, and underwater. We review the current state of knowledge concerning how polarization and polarization patterns are formed in nature, emphasizing linearly polarized light. Scattering of sunlight or moonlight in the sky often forms a strongly polarized, stable and predictable pattern used by many animals for orientation and navigation throughout the day, at twilight, and on moonlit nights. By contrast, polarization of light in water, while visible in most directions of view, is generally much weaker. In air, the surfaces of natural objects often reflect partially polarized light, but such reflections are rarer underwater, and multiple-path scattering degrades such polarization within metres. Because polarization in both air and water is produced by scattering, visibility through such media can be enhanced using straightforward polarization-based methods of image recovery, and some living visual systems may use similar methods to improve vision in haze or underwater. Although circularly polarized light is rare in nature, it is produced by the surfaces of some animals, where it may be used in specialized systems of communication.

scholarly journals Complete Terahertz Polarization Control With Broadened Bandwidth via Dielectric Metasurfaces

2021 ◽  
Author(s):  
Dacheng Wang ◽  
Song Sun ◽  
Zheng Feng ◽  
Wei Tan
Keyword(s):  
Polarized Light ◽  
Terahertz Wave ◽  
Circularly Polarized Light ◽  
Transmission Coefficients ◽  
Polarization Control ◽  
Left Handed ◽  
Linearly Polarized ◽  
Huygens Principle ◽  
Elliptically Polarized Light ◽  
Elliptically Polarized

Abstract We demonstrate terahertz dielectric metasurfaces with anisotropic multipoles within the framework of the generalized Huygens principle, in which the interference among these multipoles achieves giant phase shift with broadened bandwidth and high transmission coefficients. More importantly, owing to the anisotropic design, various phase delays between π/2 and 3π/2 are obtained, which convert the incident linearly polarized terahertz wave into right/left-handed circularly polarized light, elliptically polarized light and cross polarized light. Both simulation and experimental results verify complete terahertz polarization control with the ellipticity ranging from 1 to -1, which paves a way for polarization–related applications of terahertz meta-devices.

scholarly journals Complete Terahertz Polarization Control with Broadened Bandwidth via Dielectric Metasurfaces

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Dacheng Wang ◽  
Song Sun ◽  
Zheng Feng ◽  
Wei Tan
Keyword(s):  
Polarized Light ◽  
Terahertz Wave ◽  
Circularly Polarized Light ◽  
Transmission Coefficients ◽  
Polarization Control ◽  
Left Handed ◽  
Linearly Polarized ◽  
Huygens Principle ◽  
Elliptically Polarized Light ◽  
Elliptically Polarized

AbstractWe demonstrate terahertz dielectric metasurfaces with anisotropic multipoles within the framework of the generalized Huygens principle, in which the interference among these multipoles achieves giant phase shift with broadened bandwidth and high transmission coefficients. More importantly, owing to the anisotropic design, various phase delays between π/2 and 3π/2 are obtained, which convert the incident linearly polarized terahertz wave into right/left-handed circularly polarized light, elliptically polarized light and cross-polarized light. Both simulation and experimental results verify complete terahertz polarization control with the ellipticity ranging from 1 to − 1, which paves a way for polarization-related applications of terahertz meta-devices.

scholarly journals The Fresnel triprism and the circular polarization of light

Photoniques ◽  
2019 ◽  
pp. 44-45
Author(s):  
Oriol Arteaga ◽  
Enric Garcia-Caurel ◽  
Razvigor Ossikovski
Keyword(s):  
Circular Polarization ◽  
Polarized Light ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Polarized Beam ◽  
Left And Right ◽  
Polarization Of Light

In 1822 Augustin Fresnel discovered the circular polarization of light with an experiment in which a plane polarized beam was resolved into its left- and right- circularly polarized components after refraction at slightly different angles at the interface between two different species of quartz that formed a composite prism, called the Fresnel triprism. Fresnel’s landmark experiment, once popular, remains today a very little known method for producing circularly polarized light.

Differential polarization imaging of sickled cells

1988 ◽  
Vol 46 ◽  
pp. 62-63
Author(s):  
Marcos F. Maestre
Keyword(s):  
Optical Properties ◽  
Theoretical Approach ◽  
Polarized Light ◽  
Polarization Microscopy ◽  
Spectroscopic Techniques ◽  
Polarization Imaging ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Microscopic Scale ◽  
Chiral Structures

Recently we have developed a form of polarization microscopy that forms images using optical properties that have previously been limited to macroscopic samples. This has given us a new window into the distribution of structure on a microscopic scale. We have coined the name differential polarization microscopy to identify the images obtained that are due to certain polarization dependent effects. Differential polarization microscopy has its origins in various spectroscopic techniques that have been used to study longer range structures in solution as well as solids. The differential scattering of circularly polarized light has been shown to be dependent on the long range chiral order, both theoretically and experimentally. The same theoretical approach was used to show that images due to differential scattering of circularly polarized light will give images dependent on chiral structures. With large helices (greater than the wavelength of light) the pitch and radius of the helix could be measured directly from these images.

scholarly journals Design of a Secondary Freeform Lens of UV LED Mosquito-Trapping Lamp for Enhancing Trapping Efficiency

Crystals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 335 ◽  
Author(s):  
Wei-Hsiung Tseng ◽  
Diana Juan ◽  
Wei-Cheng Hsiao ◽  
Cheng-Han Chan ◽  
Hsin-Yi Ma ◽  
...  
Keyword(s):  
Light Intensity ◽  
Intensity Distribution ◽  
Light Emitting Diode ◽  
Trapping Efficiency ◽  
Axially Symmetric ◽  
Light Intensity Distribution ◽  
Light Emitting ◽  
Led Light ◽  
Uv Led ◽  
Freeform Lens

In this study, our proposed ultraviolet light-emitting diode (UV LED) mosquito-trapping lamp is designed to control diseases brought by insects such as mosquitoes. In order to enable the device to efficiently catch mosquitoes in a wider area, a secondary freeform lens (SFL) is designed for UV LED. The lens is mounted on a 3 W UV LED light bar as a mosquito-trapping lamp of the new UV LED light bar module to achieve axially symmetric light intensity distribution. The special SFL is used to enhance the trapping capabilities of the mosquito-trapping lamp. The results show that when the secondary freeform surface lens is applied to the experimental outdoor UV LED mosquito-trapping lamp, the trapping range can be expanded to 100π·m2 and the captured mosquitoes increased by about 300%.

Blue Circularly Polarized Luminescent Amorphous Molecules with Single-handed Propeller Chirality Induced by Circularly Polarized Light Irradiation

2021 ◽  
Author(s):  
Zhaoming Zhang ◽  
Takunori Harada ◽  
Adriana Pietropaolo ◽  
Yuting Wang ◽  
Yue Wang ◽  
...  
Keyword(s):  
Polarized Light ◽  
Light Irradiation ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Trigonal Symmetry ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

Preferred-handed propeller conformation was induced by circularly polarized light irradiation to three amorphous molecules with trigonal symmetry, and the molecules with induced chirality efficiently exhibited blue circularly polarized luminescence. In...

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