Polarization Components for the UV Range

2009 ◽  
pp. 173-180
Keyword(s):  
Uv Range

Photosensitivity of heavily GeO2-doped fibres in the near UV range between 300 and 350 nm

2006 ◽  
Vol 36 (2) ◽  
pp. 145-148 ◽  
Author(s):  
Evgenii M Dianov ◽  
A A Rybaltovsky ◽  
S L Semenov ◽  
A N Gur'yanov ◽  
V F Khopin
Keyword(s):  
Uv Range

scholarly journals Enhanced ultraviolet absorption in graphene by aluminum and magnesium hole-arrays

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xueling Cheng ◽  
Yunshan Wang
Keyword(s):  
Numerical Study ◽  
Uv Spectroscopy ◽  
Single Layer ◽  
Hybrid Structure ◽  
Uv Absorption ◽  
Single Layer Graphene ◽  
Visible Range ◽  
Uv Spectrum ◽  
Hole Arrays ◽  
Uv Range

AbstractOptoelectronic devices in the UV range have many applications including deep-UV communications, UV photodetectors, UV spectroscopy, etc. Graphene has unique exciton resonances, that have demonstrated large photosensitivity across the UV spectrum. Enhancing UV absorption in graphene has the potential to boost the performance of the various opto-electronic devices. Here we report numerical study of UV absorption in graphene on aluminum and magnesium hole-arrays. The absorption in a single-layer graphene on aluminum and magnesium hole-arrays reached a maximum value of 28% and 30% respectively, and the absorption peak is tunable from the UV to the visible range. The proposed graphene hybrid structure does not require graphene to be sandwiched between different material layers and thus is easy to fabricate and allows graphene to interact with its surroundings.

scholarly journals Dark-level trapping, lateral confinement, and built-in electric field contributions to the carrier dynamics in c-plane GaN/AlN quantum dots emitting in the UV range

2021 ◽  
Vol 129 (5) ◽  
pp. 054301
Author(s):  
M. Hrytsaienko ◽  
M. Gallart ◽  
M. Ziegler ◽  
O. Crégut ◽  
S. Tamariz ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electric Field ◽  
Carrier Dynamics ◽  
Lateral Confinement ◽  
Uv Range

Precise measurement of ARC optical indices in the deep-UV range by variable-angle spectroscopic ellipsometry

1997 ◽  
Author(s):  
Pierre Boher ◽  
Jean-Louis P. Stehle ◽  
Jean-Philippe Piel ◽  
Christophe Defranoux ◽  
Louis Hennet
Keyword(s):  
Spectroscopic Ellipsometry ◽  
Precise Measurement ◽  
Variable Angle ◽  
Variable Angle Spectroscopic Ellipsometry ◽  
Deep Uv ◽  
Uv Range

Optical properties of silicene-dielectric interfaces from IR to far UV

2021 ◽  
pp. 2150235
Author(s):  
Yujun Hou ◽  
Chun Jiang
Keyword(s):  
Optical Properties ◽  
Single Layer ◽  
Normal Incidence ◽  
Complex Surface ◽  
Optical Characterization ◽  
Potential Candidate ◽  
Dielectric Interfaces ◽  
Uv Absorbers ◽  
Uv Range

Since the growth of single layer of Si has emerged, silicene became a potential candidate material to make up the disadvantage of graphene. In this paper, the complex surface conductivity is applied to characterize the properties of silicene and we investigate the optical characterization of silicene-dielectric interfaces from IR to far UV range. The silicene-Si and silicene-Ge interfaces along both parallel and perpendicular polarization directions of electromagnetic field with normal incidence are considered in this work. The optical properties of the silicene-dielectric systems proposed in this paper lay a foundation for the performance of complex silicene-based optoelectronic devices such as sensors, detectors, filters, UV absorbers and so on.

Results of measurements of the state of the ozone layer in East Antarctica

2021 ◽  
Author(s):  
Aliaksei Borisovets ◽  
Ilya Bruchkouski ◽  
Aliaksandr Svetashev ◽  
Aliaksandr Krasouski
Keyword(s):  
Experimental Data ◽  
Solar Spectrum ◽  
East Antarctica ◽  
Vertical Column ◽  
Surface Solar Radiation ◽  
Natural Processes ◽  
Meteorological Observations ◽  
Ozone Column ◽  
Channel Filter ◽  
Uv Range

<p>Regions with an expected low anthropogenic load are of particular interest for monitoring small gas components of the atmosphere. Under such conditions, the concentration of ozone is determined by natural processes. One of these regions is East Antarctica.</p><p>The experimental part of the research included:</p><p>- Complex of meteorological observations;</p><p>- Measurement of total ozone column (TOC) in the vertical column of the atmosphere;</p><p>- Monitoring of spectra, levels and doses of surface solar radiation;</p><p>The research was carried out in the areas where the Belarusian Antarctic expeditions were based: the stations “Mount Vechernaya” and “Progress”.</p><p>The measurements were carried out by a two-channel filter photometer PION-F and an ultraviolet spectroradiometer PION-UV, developed at the NOMREC. When determining the TOC values, the method was used, which consists in restoring the TOC values by analyzing the spectral distribution of the illumination density of the Earth's surface in the UV range. According to this method, the TOC values can be obtained using the ratio of illuminances at two wavelengths of the solar spectrum, one of which falls in the region of sufficiently strong absorption of atmospheric ozone, and the other is outside this region.</p><p>During the Belarusian Antarctic expeditions, a significant amount of experimental data was obtained (more than 100,000 spectra of energy illumination, more than 1,000 average daily values of TOC, etc.). The accumulated array of experimental data can be used to study theoretical problems and solve applied problems.</p><p>This paper presents a description of the dynamics of TOC in the atmosphere of East Antarctica during the period of seasonal expeditions 2014-2020.</p>

Changes in the Spectral Characteristics of Aluminum Films Deposited under Assisting Argon Ion Beam

2015 ◽  
Vol 1084 ◽  
pp. 11-15
Author(s):  
Sergey P. Umnov ◽  
Oleg Kh. Asainov ◽  
Svetlana N. Popova ◽  
Aleksey N. Lemachko
Keyword(s):  
Magnetron Sputtering ◽  
Ion Beam ◽  
Spectral Characteristics ◽  
Crystal Defects ◽  
X Ray Diffraction ◽  
Aluminum Films ◽  
X Ray ◽  
Ion Assistance ◽  
Argon Ion ◽  
Uv Range

High-reflectance aluminum films are widely used in applied optics. As part of this work, we deposited aluminum films on glass substrates by magnetron sputtering using argon ion beam assistance. The reflectivity of the films obtained was measured on the SF-256 spectrophotometer. The microstructure and topology of the films were examined with a transmission electron microscope (TEM), X-ray diffraction (XRD) and atomic force microscope (AFM). The studies have shown that the aluminum films deposited with ion assistance have higher reflectance in the UV range than the films formed by magnetron sputtering alone. The results of TEM and AFM measurements show that the geometric factor (crystallite size, surface roughness) is not the reason for the increase of reflectivity. X-ray diffraction analyses have shown a significant increase in microstress in the aluminum films deposited with ion assistance, which is caused by an increase in the defect density of the vacancy-type crystal structure. The results have shown that the increase in the density of crystal defects leads to an increase in reflectance in the UV range.

scholarly journals Spectral distribution of UV range diffuse reflectivity for Si+ion implanted polymers

2008 ◽  
Vol 113 ◽  
pp. 012039 ◽  
Author(s):  
S Balabanov ◽  
T Tsvetkova ◽  
E Borisova ◽  
L Avramov ◽  
L Bischoff
Keyword(s):  
Spectral Distribution ◽  
Diffuse Reflectivity ◽  
Uv Range ◽  
Ion Implanted
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