RAYLEIGH SCATTERING OF CONDENSED MATTER

1953 ◽  
Vol 31 (7) ◽  
pp. 1170-1181 ◽  
Author(s):  
O. Theimer ◽  
E. Lell
Keyword(s):  
Visible Light ◽  
Rayleigh Scattering ◽  
Optical Glass ◽  
Condensed Matter ◽  
Incident Light ◽  
Relative Maximum

The scattering power S(λ) = Is/Id (Is, Id are the intensities of the scattered and the incident light) for visible light is investigated experimentally for ordinary glass, optical glass, water, and air. It is found that S(λ) for glass shows pronounced deviations from Rayleigh's 1/λ4 law, e.g., a relative maximum of S(λ) for λ = 5200 Å in the case of ordinary glass. A theory for the Rayleigh scattering of condensed matter is developed and compared with the ideas brought forward by Fürth and Humphreys-Owen in 1951. It is shown that the maxima of S(λ) observed by these authors and in the present work can be equally well derived from localized lattice imperfections or from the mosaic blocks considered by Fürth.

Synthesis of single-crystalline GeS nanoribbons for high sensitivity visible-light photodetectors

2015 ◽  
Vol 3 (31) ◽  
pp. 8074-8079 ◽  
Author(s):  
Changyong Lan ◽  
Chun Li ◽  
Yi Yin ◽  
Huayang Guo ◽  
Shuai Wang
Keyword(s):  
Visible Light ◽  
Vapor Deposition ◽  
High Performance ◽  
Incident Light ◽  
Chemical Vapor ◽  
High Sensitivity ◽  
Single Crystalline ◽  
Promising Application ◽  
Photo Detection ◽  
First Time

Single-crystalline GeS nanoribbons were synthesized by chemical vapor deposition for the first time. The nanoribbon photodetectors respond to the entire visible incident light with a response edge at around 750 nm and a high responsivity, indicating their promising application for high performance broadband visible-light photo-detection.

scholarly journals Optimization ofs-Polarization Sensitivity in Apertureless Near-Field Optical Microscopy

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Yuika Saito ◽  
Yoshiro Ohashi ◽  
Prabhat Verma
Keyword(s):  
Spatial Resolution ◽  
Rayleigh Scattering ◽  
Incident Light ◽  
Near Field ◽  
Polarized Light ◽  
Polarization Sensitivity ◽  
Experimental Setup ◽  
Experimental Conditions ◽  
General Belief ◽  
Polarization Configuration

It is a general belief in apertureless near-field microscopy that the so-calledp-polarization configuration, where the incident light is polarized parallel to the axis of the probe, is advantageous to its counterpart, thes-polarization configuration, where the incident light is polarized perpendicular to the probe axis. While this is true for most samples under common near-field experimental conditions, there are samples which respond better to thes-polarization configuration due to their orientations. Indeed, there have been several reports that have discussed such samples. This leads us to an important requirement that the near-field experimental setup should be equipped with proper sensitivity for measurements withs-polarization configuration. This requires not only creation of effective s-polarized illumination at the near-field probe, but also proper enhancement of s-polarized light by the probe. In this paper, we have examined thes-polarization enhancement sensitivity of near-field probes by measuring and evaluating the near-field Rayleigh scattering images constructed by a variety of probes. We found that thes-polarization enhancement sensitivity strongly depends on the sharpness of the apex of near-field probes. We have discussed the efficient value of probe sharpness by considering a balance between the enhancement and the spatial resolution, both of which are essential requirements of apertureless near-field microscopy.

Atmospheric Scattering

2017 ◽  
Author(s):  
Kelly Chance ◽  
Randall V. Martin
Keyword(s):  
Function Approximation ◽  
Legendre Polynomials ◽  
Rayleigh Scattering ◽  
Scattered Light ◽  
Incident Light ◽  
Mie Scattering ◽  
Spherical Particles ◽  
Atmospheric Scattering ◽  
Phase Functions ◽  
Scatterer Size

This chapter describes elastic scattering events, where the wavelength of the scattered light is unchanged from that of the incident light and conservative scattering, scattering without absorption, sometimes closely approximated in clouds. The scattering regime, scattering versus wavelengths and scatterer size are introduced. Polarization in scattering is described by the Stokes vector and the polarization ellipse. Molecular (Rayleigh) scattering is presented and its atmospherically-important inelastic component, Raman scattering (the Ring effect) quantified. Mie scattering for spherical particles is described as is the commonly-used Henyey-Greenstein Mie phase function approximation. Non-spherical scatterers are introduced. The Ångstrom exponent and the expansion of phase functions in Legendre polynomials are described.

Bio-inspired Structural Colors and Their Applications

2021 ◽  
Author(s):  
Fengxiang Chen ◽  
Ya Huang ◽  
Run Li ◽  
Shiliang Zhang ◽  
Baoshun Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Incident Light ◽  
Nanostructured Surfaces ◽  
Structural Colors

Structural colors, generated by the interaction of interference, diffraction, and scattering between incident light and periodic nanostructured surfaces with features of the same scale with incident visible light wavelengths, have...

Dielectric Filter for Highly Sensitive Raman Spectroscopy

1996 ◽  
Vol 50 (2) ◽  
pp. 199-204 ◽  
Author(s):  
Masayuki Futamata
Keyword(s):  
Rayleigh Scattering ◽  
Copper Phthalocyanine ◽  
Incident Light ◽  
Notch Filter ◽  
Raman Signal ◽  
Liquid Sample ◽  
Glass Capillary ◽  
Highly Sensitive ◽  
Dielectric Filter ◽  
Holographic Notch Filter

A filter spectrometer using dielectric bandpass filters eliminates Rayleigh scattering down to 10-5 while passing more than 90% of Raman signal from 50 to 2000 cm−1. It improves the optical throughput about 8–9 times in comparison to a double-stage subtractive monochromator, and about 20% in comparison to a holographic notch filter. Moreover, transmittance of the filter spectrometer does not depend on polarization of the incident light at the optimum angle. Raman spectra from powder sample of bismuth oxide and copper phthalocyanine and liquid sample of carbon tetrachloride in a glass capillary were easily observed down to 50 cm−1 with the use of the filter spectrometer combined with a single-stage monochromator.

scholarly journals The Use of Tunable Optical Absorption Plasmonic Au and Ag Decorated TiO2 Structures as Efficient Visible Light Photocatalysts

Catalysts ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 139 ◽  
Author(s):  
Xiaohong Yang ◽  
Yan Wang ◽  
Lingtong Zhang ◽  
Haitao Fu ◽  
Peng He ◽  
...  
Keyword(s):  
Visible Light ◽  
Noble Metal ◽  
Environmental Remediation ◽  
Noble Metals ◽  
Incident Light ◽  
Perfect Match ◽  
Energy Utilization ◽  
Plasmonic Enhancement ◽  
Research Attention ◽  
Tio2 Particles

Exploring solar-excited heterogeneous photocatalysts by taking advantage of surface plasmon resonance (SPR) has drawn growing research attention. As it could help to pave the way for global sustainable development. The decoration of TiO2 particles with noble metals possessing SPR effects is regarded as one of the most effective solutions. The perfect match of the SPR absorption band with the spectrum of incident light is an essential factor for plasmonic enhancement. However, modifying with sole noble metal is often limited as it tunes wavelength of only several nanometers. To overcome this drawback, an alternative approach can be offered by decoration with more than one noble metal. For instance, Au-Ag co-decoration displays greatly adjustable, composition-dependent SPR agent over a broad range of the visible light spectrum (ca. from 415 to 525 nm). Hence Au-Ag complex is a remarkable candidate for tuning the photo adsorption of TiO2 from UV to visible light. This study presents a novel and tailored method for the fabrication of Au-Ag co-modified TiO2 particles, and how Au-Ag dependent SPR was applied as the visible light-responsive TiO2 based photocatalysts in a simple but reliable way. The fabricated Au-Ag co-decorated TiO2 (AuxAg(1−x)/TiO2) was characterized and proved to own excellent stability and large specific surface area. The optimization of these particles against the wavelength of maximal solar light intensity was confirmed by photo degradation of methylene blue under visible light radiation. This work may provide further insight into the design of TiO2-based composites with improved photocatalytic properties for environmental remediation and renewable energy utilization.

scholarly journals Detection of nanoparticles suspended in a light scattering medium

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yan Ye ◽  
David Y. H. Pui
Keyword(s):  
Light Scattering ◽  
Visible Light ◽  
Light Wave ◽  
Incident Light ◽  
Scattering Medium ◽  
Light Interference ◽  
Potential Applications ◽  
Power Frequency ◽  
Suspended Nanoparticles ◽  
Incident Light Wave

AbstractIntentionally intensifying the light scattering of medium molecules can allow the detection of suspended nanoparticles under conditions not suitable for conventional optical microscopies or laser particle counters. Here, we demonstrate how the collective light scattering of medium molecules and nanoparticles is imaged in response to the power, frequency, and oscillating direction of the incident light wave electric field, and how this response can be used to distinguish between nanoparticles and microparticles, such as viruses or bacteria. Under conditions that the medium light scattering is intensified, suspended nanoparticles appear as magnified shiny moving dots superimposed on the quasi-steady background of medium light scattering. Utilizing the visual enlargement resulted from the enhanced light scattering and possible light interference, we can detect directly suspended nanoparticles that are much smaller than visible light wavelengths even in unopened water bottles or other large containers. This suggests new approaches for detecting nanoparticles with many potential applications.

scholarly journals ANGLE-DEPENDENT TRANSMISSION FOR VISIBLE LIGHT OF MAGNETIC GRANULAR THIN FILMS

2018 ◽  
Vol 54 (5A) ◽  
pp. 27
Author(s):  
Giap Van Cuong
Keyword(s):  
Magnetic Field ◽  
Thin Films ◽  
External Magnetic Field ◽  
Visible Light ◽  
Angular Dependence ◽  
Incident Light ◽  
Granular Films ◽  
Photon Interaction ◽  
Surface Normal

      The transmission for visible light (T), with wavelengths from 560 to 695 nm, was investigated at various light incident angles of 0 ¸ 45 degree for the surface normal of samples (φ) as a function of Co contents for magnetic granular films Cox-(Al2O3)1-x, where x = 0.10 ¸ 0.45. This investigation was carried out under an external magnetic field fixed at 4 kOe to ensure for all the Co-granule magnetization being kept in a fixed incident light propagating direction. Results showed a rather remarkable angular dependence of T(φ) on the Co content for different wavelengths. It was attributed the behavior of this to be dependent on the so-called magnon-photon interaction.

Visible light intensity dependent negative photochromism of a binaphthyl-bridged phenoxyl-imidazolyl radical complex

2019 ◽  
Vol 55 (9) ◽  
pp. 1221-1224 ◽  
Author(s):  
Izumi Yonekawa ◽  
Katsuya Mutoh ◽  
Jiro Abe
Keyword(s):  
Light Intensity ◽  
Visible Light ◽  
Photochemical Reaction ◽  
Incident Light ◽  
Incident Light Intensity ◽  
Intensity Dependence ◽  
Radical Complex ◽  
Negative Photochromism

We herein report a novel biphotochromic molecule composed of two fast negative photochromic phenoxyl-imidazolyl radical complex units showing incident light intensity dependence of the photochemical reaction.

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