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.

Substitution Effect on 2-(Oxazolinyl)-phenols: Emission Color-Tunable, Minimalistic Excited-State Intramolecular Proton Transfer (ESIPT)-based Luminophores

2021 ◽  
Author(s):  
Dominik Göbel ◽  
Pascal Rusch ◽  
Daniel Duvinage ◽  
Tim Stauch ◽  
Nadja C. Bigall ◽  
...  
Keyword(s):  
Optical Properties ◽  
Excited State ◽  
Solid State ◽  
Substitution Effect ◽  
Optical Characterization ◽  
Intramolecular Proton Transfer ◽  
Substitution Pattern ◽  
Emission Color ◽  
Color Tunable

The synthesis and optical characterization of novel single-benzene ESIPT-based fluorophores is described in solid state and in solution. Special attention is given towards the influence of their unique substitution pattern on their optical properties. Depending on this pattern, aggregation induced emission or aggregation caused quenching (ACQ) is observed in the solid state.<br>

SYNTHESIS AND OPTICAL CHARACTERIZATION OF PYROELECTRIC NANOPOWDERS BASED ON PZT (95/5)

2010 ◽  
Vol 09 (03) ◽  
pp. 193-199 ◽  
Author(s):  
E. PAKIZEH ◽  
S. M. HOSSEINI ◽  
A. KOMPANY ◽  
M. GHASEMIFARD
Keyword(s):  
Low Temperatures ◽  
Optical Constants ◽  
Sol Gel ◽  
Normal Incidence ◽  
Optical Characterization ◽  
Analysis Program ◽  
Secondary Phases ◽  
Ir Reflectance ◽  
Gel Technique

Pb(Zr1-x, Tix)O3 (x = 0.05) with pyroelectric properties have been synthesized by sol–gel technique at low temperatures. XRD results indicate that the powder has perovskite structure without secondary phases and the average of particle size was estimated to be about 40 nm in diameters. The optical constants such as refractive index, n, extinction coefficient, k, and the dielectric function of PZT nanopowders have been investigated by Fourier transmittance infrared (FTIR) spectrum and Kramers–Kronig (KK) analysis program. The use of the KK method to analyze the normal incidence infrared (IR) reflectance spectra with a single resonance has also been described. The results indicated that the optical constant increases slowly as temperature of calcinations increases.

scholarly journals Optical Characterization of Porous Sputtered Silver Thin Films

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Olivier Carton ◽  
Jaouad Ghaymouni ◽  
Michaël Lejeune ◽  
Andreas Zeinert
Keyword(s):  
Optical Properties ◽  
Optical Characterization ◽  
Optical Data ◽  
Plasma Parameters ◽  
Silver Films ◽  
Physical Measurements ◽  
Silver Thin Films ◽  
Porous Silver ◽  
Effective Medium Models

The optical properties of various porous silver films, grown with a commercial DC sputter coater, were investigated and compared for different plasma parameters. Effective Drude models were successfully used for those films whose spectra did not show particular resonance peaks. For the other films, neither an effective Drude model nor effective medium models (Maxwell Garnett, Bruggeman, and Looyenga) can describe the optical properties. It turns out that a more general approach like the Bergman representation describes the optical data of these films accurately adopting porosity values consistent with physical measurements.

scholarly journals Optical characterization of single plasmonic nanoparticles

2015 ◽  
Vol 44 (1) ◽  
pp. 40-57 ◽  
Author(s):  
Jana Olson ◽  
Sergio Dominguez-Medina ◽  
Anneli Hoggard ◽  
Lin-Yung Wang ◽  
Wei-Shun Chang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Characterization ◽  
Optical Measurements ◽  
Plasmonic Nanoparticles

This review surveys the optical properties of plasmonic nanoparticles, and describes techniques used in the optical measurements of single nanoparticles.

scholarly journals Optical Characterization of Asphalt Binders Containing Wax Additives

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Mithil Mazumder ◽  
Raju Ahmed ◽  
Moon-Sup Lee ◽  
Soon-Jae Lee
Keyword(s):  
Optical Properties ◽  
Aging Process ◽  
Significant Contribution ◽  
Asphalt Binder ◽  
Optical Characterization ◽  
Crumb Rubber ◽  
Asphalt Binders ◽  
Oxidative Aging ◽  
Modified Binder

In between thermal-oxidative (heat and oxygen) and photo-oxidative (ultraviolet irradiation and oxygen) aging process of bitumen, photo-oxidative aging mainly depends on the optical properties of the asphalt binder. The higher the reflection (or the lower the absorption of the binders), the better the pavement serviceability. The literature review indicates that there is limited research conducted on the optical properties of the binder with wax additives. In this paper, the optical properties of commonly used binders (PG 64-22, Rubber modified binder, and SBS modified binder) containing wax additives (LEADCAP and Sasobit) were investigated using UV-Vis spectrometer. The result of this study showed that (1) the addition of modifiers (crumb rubber and SBS) with the base binder slightly increases the absorption of the binder; (2) the binder types and aging level have significant contribution on optical properties; (3) in general, the aged binders were observed to have higher reflectivity compared to the unaged binders; and (4) the addition of wax additives is observed to have a significant effect on the optical properties.

Synthesis, Structural and Optical Characterization of Zinc Chalcogentdes in Novel Solid State Hosts

1992 ◽  
Vol 242 ◽  
Author(s):  
Kelly L. Moran ◽  
Andrew W. Ott ◽  
Thurman E. Gier ◽  
William T. A. Harrison ◽  
Hellmut Eckert ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Absorption Spectra ◽  
Diffuse Reflectance ◽  
Optical Characterization ◽  
Optical Absorption Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bulk Semiconductor

ABSTRACTSeveral series of sodali te analogues of unit cell composition M8X2(TO2)12, where M is Zn or Cd, X is a chalcogen, and T is a tetrahedral cation B, or Be in combination with Si or Ge, have been prepared. An M4X tetrahedron, which is the first coordination sphere of the bulk semiconductor MX, sits at the center of each sodalite cage. These materials have been structurally characterized by solid state 77Se and 125STe MAS NMR and by powder X-ray diffraction. Diffuse reflectance optical absorption spectra are reported for each series. The borates have optical properties similar to the bulk MX whereas the beryllosilicates and germanates exhibit large blue shifts in the absorption spectra.

scholarly journals Optical Properties of Fully Inorganic Core/Gradient-Shell CdSe/CdZnS Nanocrystals at the Ensemble and Single-Nanocrystal Levels

2021 ◽  
Author(s):  
Justine Baronnier ◽  
Benoit Mahler ◽  
olivier Boisron ◽  
Christophe Dujardin ◽  
Florian Kulzer ◽  
...  
Keyword(s):  
Optical Properties ◽  
Oleic Acid ◽  
Quantum Yield ◽  
Optical Characterization ◽  
Luminescence Quantum Yield

We report the synthesis and optical characterization of fully inorganic gradient-shell CdSe/CdZnS nanocrystals (NCs) with high luminescence quantum yield (QY, 50 %), which were obtained by replacing native oleic-acid (OA)...

Optical Characterization of Chemically Vapor Deposited and Laser-Annealed Polysilicon

1981 ◽  
Vol 4 ◽  
Author(s):  
B. G. Bagley ◽  
D. E. Aspnes ◽  
G. K. Celler ◽  
A. C. Adams
Keyword(s):  
Optical Properties ◽  
Spectroscopic Ellipsometry ◽  
Silicon Surface ◽  
Optical Characterization ◽  
Effective Medium Approximation ◽  
Incident Power ◽  
Spot Diameter ◽  
Amorphous Component ◽  
Ion Laser

ABSTRACTThe optical properties of polysilicon on insulating SiO2 were measured by spectroscopic ellipsometry over the energy range 3.0 to 6.0 eV. Spectra were obtained for films as-deposited and after irradiation with an Ar ion laser (focused to a 50μm spot diameter) at 6.0, 7.0 or 7.5 watts. We observed monotonic changes in both ε1 and ε2 with increasing incident power even though the power density was high enough to completely melt the silicon surface in all cases. The changes observed are caused by changes in microstructure; with increasing power the amorphous component decreases and the density increases. Approximate values of the microstructural components are estimated by comparing measured spectra to those synthesized from constituent spectra in the Bruggeman effective medium approximation.

Optical Characterization of Binuclear Phthalocyanines

1995 ◽  
Vol 413 ◽  
Author(s):  
Jason P. Sokoloff ◽  
Shuichi Yanagi ◽  
Brian P. McGinnis ◽  
Minquan Tian ◽  
Tatsuo Wada ◽  
...  
Keyword(s):  
Optical Properties ◽  
Concentration Dependence ◽  
Optical Characterization ◽  
Optical Response ◽  
Linear Absorption ◽  
Metal Free

ABSTRACTWe report the synthesis, and optical characterization of the planar binuclcar phthalocyanines metal free (-1)( H2Pc)2(t-bu)6 and (-l)(VOPc)2(t-bu)6. Several of their optical properties, including linear absorption, concentration dependence, electroabsorption, and transient optical response were measured.

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