Optical Properties of Laser Induced Heavily Doped Silicon Layers

1983 ◽  
Vol 23 ◽  
Author(s):  
A. Slaoui ◽  
E. Fogarassy ◽  
P. Siffert ◽  
J.F. Morhange ◽  
M. Balkanski
Keyword(s):  
Solid Solution ◽  
Optical Properties ◽  
Visible Light ◽  
Laser Annealing ◽  
Supersaturated Solid Solution ◽  
Raman Spectrometry ◽  
Silicon Lattice ◽  
Doped Silicon ◽  
Heavily Doped

ABSTRACTThe goal of this paper is to investigate optical properties of heavily doped silicon, performed by laser annealing of implanted layers.The optical properties were investigated by using U.V. and visible light (between 200 and 500 nm)reflectance and Raman spectrometry measurements. The experimental observations have been correlated with the contribution of the supersaturated solid solution of arsenic in the silicon lattice. Furthermore,the absorption coefficent of these layers has been deduced from ellipsometry measurements.

Infrared Optical Properties of Ion Implanted and Laser Annealed Silicon

1980 ◽  
Vol 1 ◽  
Author(s):  
Masanobu Miyao ◽  
Teruaki Motooka ◽  
Nobuyoshi Natsuaki ◽  
Takashi Tokuyama
Keyword(s):  
Optical Properties ◽  
Carrier Concentration ◽  
Laser Annealing ◽  
Electronic States ◽  
Free Carrier ◽  
High Dose ◽  
Carrier Relaxation ◽  
Carrier Effective Mass ◽  
Heavily Doped ◽  
Infrared Optical Properties

ABSTRACTElectronic states of extremely heavily doped n-type Si obtained by high dose ion implantation and laser annealing are investigated by measuring the infrared optical properties. Free carrier effective mass (m*) and carrier relaxation time (τ) are obtained as a function of carrier concentration (1019−5×1021 cm−3). Values of m* and τ increase and decrease, respectively, with the increase of carrier concentration. These results are discussed in relation to the occupation of electrons in a new valley of the conduction band.

Influence of cadmium salt anion on crystal structure and optical properties of supersaturated solid solution CdxPb1−xS films

2020 ◽  
Author(s):  
Irina V. Vaganova ◽  
Larisa N. Maskaeva ◽  
Elena V. Mostovshchikova ◽  
V. I. Voronin ◽  
Vyacheslav F. Markov
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
Optical Properties ◽  
Supersaturated Solid Solution ◽  
Salt Anion ◽  
Cadmium Salt

Optical Properties of Heavily Doped Silicon between 1.5 and 4.1 eV

1981 ◽  
Vol 46 (21) ◽  
pp. 1414-1417 ◽  
Author(s):  
G. E. Jellison ◽  
F. A. Modine ◽  
C. W. White ◽  
R. F. Wood ◽  
R. T. Young
Keyword(s):  
Optical Properties ◽  
Doped Silicon ◽  
Heavily Doped

Direct Observation of Monolayer Zones in Al-wt 4% Cu

1990 ◽  
Vol 48 (1) ◽  
pp. 14-15
Author(s):  
B. Jouffrey ◽  
D. Dorignac ◽  
A. Bourret
Keyword(s):  
Solid Solution ◽  
Synchrotron Radiation ◽  
Direct Observation ◽  
Supersaturated Solid Solution ◽  
Original Model ◽  
X Ray ◽  
Image Position

Since the early works on GP zones and the model independently proposed by Preston and Guinier on the first steps of precipitation in supersaturated solid solution of aluminium containing a few percent of copper, many works have been performed to understand the structure of different stages in the sequence of precipitation.The scheme which is generally admitted can be drawn from a work by Phillips.In their original model Guinier and Preston analysed a GP zone as composed of a single (100) copperrich plane surrounded by aluminum atomic planes with a slightly shorter distance from the original plane than in the solid solution.From X-ray measurements it has also been shown that GP1 zones were not only copper monolayer zones. They could be up to a few atomic planes thick. Different models were proposed by Guinier, Gerold, Toman. Using synchrotron radiation, proposals have been recently made.

OPTICAL PROPERTIES OF HEAVILY DOPED POLYACETYLENE FILMS

1983 ◽  
Vol 44 (C3) ◽  
pp. C3-345-C3-348
Author(s):  
O. Bernard ◽  
M. Palpacuer ◽  
C. Benoit ◽  
M. Rolland ◽  
M. J.M. Abadie
Keyword(s):  
Optical Properties ◽  
Heavily Doped

Optical Properties of Photodynamic Therapy Drugs in Different Environments: The Paradigmatic Case of Temoporfin

2020 ◽  
Author(s):  
busenur Aslanoglu ◽  
Ilya Yakavets ◽  
Vladimir Zorin ◽  
Henri-Pierre Lassalle ◽  
Francesca Ingrosso ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Optical Properties ◽  
Photodynamic Therapy ◽  
Minimally Invasive ◽  
Visible Light ◽  
Cancer Treatment ◽  
Singlet Oxygen ◽  
Tumor Cells ◽  
Molecular Oxygen ◽  
Computational Tools

Computational tools have been used to study the photophysical and photochemical features of photosensitizers in photodynamic therapy (PDT) –a minimally invasive, less aggressive alternative for cancer treatment. PDT is mainly based by the activation of molecular oxygen through the action of a photoexcited sensitizer (photosensitizer). Temoporfin, widely known as mTHPC, is a second-generation photosensitizer, which produces the cytotoxic singlet oxygen when irradiated with visible light and hence destroys tumor cells. However, the bioavailability of the mostly hydrophobic photosensitizer, and hence its incorporation into the cells, is fundamental to achieve the desired effect on malignant tissues by PDT. In this study, we focus on the optical properties of the temoporfin chromophore in different environments –in <i>vacuo</i>, in solution, encapsulated in drug delivery agents, namely cyclodextrin, and interacting with a lipid bilayer.

Metallographic analysis of M2 high speed steel granules

2019 ◽  
pp. 78-85
Author(s):  
L. E. Afanasieva
Keyword(s):  
Solid Solution ◽  
Cellular Structure ◽  
High Speed ◽  
Solution Structure ◽  
Supersaturated Solid Solution ◽  
High Speed Steel ◽  
Metallographic Analysis ◽  
M2 High Speed Steel ◽  
Melt Composition

The article is devoted to the metallographic analysis of the M2 high-speed steel granules. The study is based on the investigation of the microstructure of the M2 high-speed steel granules obtained by melt atomization. It is demonstrated that granules of similar size can harden both by chemically separating and chemically non-separating mechanism. These last ones have supersaturated solid solution structure of the liquid melt composition, a dispersed dendritic-cellular structure and an increased microhardness HV = 10267±201 MPa.

LaTaON2-BaTaO2N solid solution for water oxidation

2021 ◽  
Author(s):  
Yuwei Zhang ◽  
Xiaoxiang Xu
Keyword(s):  
Solid Solution ◽  
Visible Light ◽  
Water Oxidation ◽  
Oxidation Reactions ◽  
Visible Light Active

Solid solution of LaTaON2 and BaTaO2N, i.e., La1-xBaxTaO1+yN2-y (0 ≤ x, y ≤ 1), have been investigated as visible-light-active photocatalysts for water oxidation reactions. A number of important parameters such...

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