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Showing 1 to 20 of 48 for “"Stark effect"”.
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Theoretical investigation of the quantum-confined Stark effect
… systems. However, in this representation, the effects of electron-hole correlation must be understood in order to accurately describe the system's optical and electronic properties.</p> <p>The electron-hole wave function consists of two separate mathematical components which are the explicitly …
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The Motional Stark Effect diagnostic on Alcator C-Mod
A ten channel Motional Stark Effect diagnostic has been installed on Alcator C-Mod to measure the plasma internal magnetic pitch angle profile. The C-Mod MSE measures the local electric field direction by measuring the polarization angle of Balmer-[alpha] n=2) emission from a radially injected …
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Engineering upgrades to the Motional Stark Effect diagnostic on Alcator C-Mod
The Motional Stark Effect (mse) diagnostic deployed on the alcator c-mod tokamak previously experienced unacceptable calibration drift and sensitivity to partially-polarized background light that limited its ability to measure magnetic field pitch-angles. The need to identify the cause of the …
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Optical Stark Effect of Indole; Optical and Viscometric Studies of Modified, Complexed and Naturally Occurring Dna
Made available in DSpace on 2014-12-10T23:02:01Z (GMT). No. of bitstreams: 1 7511566.pdf: 4425169 bytes, checksum: 72c31ab9c17ce38c8ecee28a61a4407e (MD5) Previous issue date: 1974
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Diagnostic Development of Gas Delivery and Viewing System for Analysing the Electric Field Stark Effect on H-Alpha Light Emissions close to a Plasma Excitation Antenna
… It is proposed that measurements of the Stark splitting and polarization of Balmer-alpha light emissions emanating from a supersonic hydrogen gas beam injected into the plasma volume directly under the antenna system could be used to give information about the sheath field and a better …
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Diagnostic Development of Gas Delivery and Viewing System for Analysing the Electric Field Stark Effect on H-Alpha Light Emissions close to a Plasma Excitation Antenna
… It is proposed that measurements of the Stark splitting and polarization of Balmer-alpha light emissions emanating from a supersonic hydrogen gas beam injected into the plasma volume directly under the antenna system could be used to give information about the sheath field and a better …
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Toward pure electronic spectroscopy
… ion-core. The first characterization of the Stark effect in a Rydberg system of this nature is presented here, and a diagnostic application of the Stark effect for making assignments of N+ and f quantum numbers has been demonstrated. In addition, a general method, which relies on polarization …
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Femtosecond pulse generation in surface-emitting semiconductor lasers
… laser, with modelocking via the optical Stark effect allowing VECSELs to produce sub-picosecond pulses in transform-limited beams, at power levels up to 100 mW and at GHz repetition rates.<br/>The work presented in this thesis describes recent progress in reducing the durations of VECSEL …
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Fundamental Studies of Two Important Atmospheric Oxidants, Ozone and Hydroxyl Radical, Reacting with Model Organic Surfaces
… was designed to leverage the linear Stark effect to pass only suitable molecules in a particular rotational state and block the flow of any other atoms, molecules and ions in a molecular beam. The state-selector was validated and used to positively deflect molecular beams of methyl …
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Understanding small molecule-protein interactions
… to an applied electric field, the vibrational Stark effect. In this work, an improved classical molecular electrostatic model for the CO ligand was developed to faithfully model these phenomena. This model is found to predict the vibrational Stark effect and Fe-CO binding energy with …
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Electric field effects on optical absorption by excitons in semiconductors
The effect of an electric field on exciton oscillator strengths is calculated for both bound and continuum states. The calculation is performed for Wannier excitons using the effective~mass approximation at both the Mo and M3 type edges. In comparison with single-particle theory, the inclusion of …
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Electromagnetically Induced Transparency and electron spin dynamics using superconducting quantum circuits
… on the SQC-atom analogy to quantum optical effect associated with atoms, known as Electromagnetically Induced Transparency (EIT). An EIT (denoted as S-EIT) based technique has been proposed to demonstrate microwave transparency using a superconductive quantum circuit exhibiting two …
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Determination of the molecular structure of Sulphonyl Chloride Isocyanate using microwave spectroscopy
… SO₂³⁵CINCO and SO₂³⁷CINCO, by considering the Stark effect and the nuclear quadrupole splittings due to chlorine and nitrogen. Rotational constants and nuclear quadrupole coupling constants were determined from the assigned peaks. The bond angles and dihedral angles were derived from the six …
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Computer Modeling of Silicon Quantum Dot Floating -Gate Flash Memory Devices
… quantum-dot floating gate, we focus on the effects on the wrap-gate on the onset of inversion and analyzed the influence of the extent of the control gate overlap on the charging behavior of the device. We have also investigated the operation of the nano-crystal memory. We show that the …
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Influence of cation size and surface coverage upon the infrared spectrum of carbon monoxide
… potential, in agreement with Electrochemical Stark effect. The Stark tuning rate of adsorbed CO was determined to be inversely proportional to electrolyte cation size. This quantitative relationship between the Stark tuning rate and cation size is the first time that this has been …
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Ultrafast carrier dynamics and enhanced electroabsorption in (gallium,indium)arsenide/(aluminum,indium)arsenide asymmetric double quantum well structures
… with phase-space filling and space-charge effects blocking tunneling carriers. The fast transfer of electrons was confirmed to be a LO-phonon assisted process. A detailed theoretical study of ultrafast hole tunneling at low carrier densities indicates that in ternary materials alloy …
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Optical properties of GaAs coupled quantum wells and superlattices: electric and magnetic field effects
In this thesis the effects of electric and magnetic fields on the optical transmission and reflection spectra of GaAs/ AlGaAs coupled quantum wells and superlattices are investigated and their potential application in optical modulation demonstrated. Quenching and enhancement of excitonic …
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Multi-dimensional Data Analysis in Electron Microscopy
… microscope (STEM) experiments. As a result, the Stark effect in quantum disks was mapped in a cathodoluminescence STEM experiment, and fully quantifiable 3D atomic distributions of a complex boron nitride core-shell nanoparticle were reconstructed from an electron energy loss spectrum (EELS) …
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