Quantum dots--Optical properties
Exciton related nonlinear optical properties in cylindrical quantum dots with asymmetric axial potential: combined effects of hydrostatic pressure, intense laser field, and applied electric field
... the optical absorption resonant peak is a rather smooth function of the varying Al compo- ...the optical absorption coefficient with respect to the increase in the hydrostatic ...nonlinear optical ...
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Fabrication of Silicon Carbide Quantum Dots via Chemical Etching Approach and Fluorescent Imaging for Living Cells
... A simple chemical-etching approach is used to prepare the silicon carbide quantum dots (QDs). The raw materials of silicon carbide (SiC) with homogeneous nanoparticles fabricated via self-pro- pagating ...
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Excitonic effects on the second order nonlinear optical properties of semi spherical quantum dots
... semi-spherical quantum dot solving the corresponding three-dimensional Schrödinger equation using a finite elements method and taking into account both the confinement and Coulomb potentials of the electron-hole ...
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Optical, Thermal and Structural Properties of CdS Quantum Dots Synthesized by A Simple Chemical Route
... (quantum dots) has wide band gap, it is widely used in optoelectronics, photonics, photovoltaics and ...[19], optical filters, and all optical switches ...These properties are the ...
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Optical properties of as grown and annealed InAs quantum dots on InGaAs cross hatch patterns
... Figure 4c shows the FWHM of the 1.42-eV WL peak, and the 1.250-eV [1-10]-aligned and the 1.296-eV [110]- aligned QD peaks as a function of annealing time. The changes in QDs ’ FWHM are non-monotonous, small, and most ...
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Effect of surface ligands on the optical properties of aqueous soluble CdTe quantum dots
... Also, in the case of water-soluble CdTe nanocrystals, the influence of some types of surface ligands on the structural and optical properties has been studied [15,16]. The most often used surface ligands ...
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Influence of GaAsBi Matrix on Optical and Structural Properties of InAs Quantum Dots
... InAs/GaAsBi dot-in-well structures were fabricated using gas-source molecular beam epitaxy and investigated for its optical and structural properties. GaAsBi-strained buffer layer and strain reduction layer ...
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Optical Properties Investigation of Core/Shell Quantum Dots by Low Temperature Synthesis
... or quantum dots (QDs) have attracted tremendous attention in both of fundamental studies and technical applications, such as lasers[1], biomedical fluorescence labels[2-4], and light-emitting diodes[5], ...
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Optical Properties of GaAs Quantum Dots Fabricated by Filling of Self Assembled Nanoholes
... GaAs quantum well. Interestingly, a quantum well–related peak is missing or very weak for the samples containing LDE ...GaAs quantum well migrate into the energetically favorable QDs and recombine ...
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Optical Properties of CdSe Quantum Dots via Non-TOP based Route
... It is noteworthy to note that the energy band gap of optical materials can occur in direct and indirect forms, which refers to the electron and holes concentration at the conduction and valence band [15]. Fig. ...
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Properties of Si quantum dots
... Si is one of the most abundant bulk materials harvested from the earth's crust. Atoms in crystalline Si are arranged in a diamond lattice structure with a lattice constant of 5.43Å. 15 The crystal structure of a material ...
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Functionalized silicon quantum dots by N vinylcarbazole: synthesis and spectroscopic properties
... Silicon quantum dots (Si QDs) attract increasing interest nowadays due to their excellent optical and electronic ...spectroscopic properties from either free ligands or Si QDs ...
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Interplay Effect of Temperature and Excitation Intensity on the Photoluminescence Characteristics of InGaAs/GaAs Surface Quantum Dots
... the optical properties of self-assembled InGaAs/GaAs SQDs in composite nanostructures with the InGaAs SQDs sepa- rated from an InGaAs BQD layer by a thick GaAs spa- cer, but with varied QD areal density ...
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Structural and Optical Properties of ZnS Quantum Dots synthesized by CBD method
... striking properties of the QDs is that tuanable optical properties can be achieved by modulating their size, their chemical composition and defects concentration etc ...that quantum ...
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Competitive Performance of Carbon “Quantum” Dots in Optical Bioimaging
... improved optical imaging performance of these more fluorescent carbon dots in mice further confirms that the excellent fluorescence properties of carbon dots observed in solutions and on ...
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Giant Optical Activity of Quantum Dots, Rods, and Disks with Screw Dislocations
... the optical properties of materials: first, by elaborating the geometry and composition of structures made of materials found in nature, later by structuring the existing materials at a scale smaller than ...
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Energy state of InGaAs quantum dots on SiO2 patterned vicinal substrate
... and 3.2 ML, respectively. The growth thickness and temperature of GaAs cap layer for PL were 100 nm and 500°C, respectively. The structural and optical properties were investigated by SEM and μ-PL. μ-PL ...
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1300 nm wavelength InAs quantum dot photodetector grown on silicon
... The optical and electrical properties of InAs quantum dots epitaxially grown on a silicon substrate have been investigated to evaluate their potential as both photodiodes and avalanche ...
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Altering the Optical Properties of GaAsSb Capped InAs Quantum Dots by Means of InAlAs Interlayers
... and 60 Å), the tunneling is further reduced but the elec- tron and hole wavefunction overlap is substantially re- duced favoring the recombination of electrons in GaAs with holes in GaAsSb [13]. The optical ...
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Preparation and Characterization of CdSe QDs via Pyrolysis of Organometalic Reagent
... selenide quantum dot based on the pyrolysis of organometallic reagents injection into a hot non-coordinating solvent is ...selenide quantum dots using inexpensive trioctylphosphine-coordinated ...
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