OPTICAL AND TUNNELING SPECTROSCOPY OF SEMICONDUCTOR NANOCRYSTAL QUANTUM DOTS

The optical resonance of a three-level system of the strongly correlated electrons in the twolevel semiconductor quantum dot interacting with the linearly polarized monochromatic electromagnetic radiation is studied. With the application of the Green function method the expressions of the state vect[r]

field applied at various angles to the growth and excitation direction using optically-inducedtransient linear birefringence. Previous studies on this sample have shown that some of theexcitons experience a low symmetry environment which lifts the degeneracy of the opticallyacti[r]

The binding energy of exciton in quantum dots with a parabolic confinement potential was calculated by variational methods beyond the Kohn-Luttinger effective mass theory, when the central-cell correction was taken into account.We have assumed that a short range potential with two parameters for str[r]

We study the electron spin dynamics in 2D - quantum dots due to the hyperfine interaction with surrounding nuclear spins. The study shows that electron spin dynamics depends strongly on the initial state and polarization of the nuclear spin system. Obtained results has shown that electron spin dynam[r]

In this book chapter, we study the nonlinear absorption of a strong electromagnetic wave in low dimensional systems (quantum wells, doped superlattices, cylindrical quantum wires and rectangular quantum wires) by using the quantum kinetic equation method. Starting from the kinetic equation f[r]

... To trap a single atom, we start with an atomic cloud in a magneto-optical trap (MOT) and use an optical dipole trap to trap a single atom at the focus of the lens1 A MOT consists of three pairs... my stay enjoyable To all my family members, especially my parents, that are always there and have a[r]

... the free- standing AgNPs -PMMA films were peeled off and collected The thickness of the AgNPs -PMMA films was measured using micrometer caliper and found to be 100 μm The free- standing AuNPs -PMMA. .. and the nonlinear optical properties of two kinds of flexible free standing films have been in[r]

.. .DESIGN AND ANALYSIS OF PARITY- CHECK- CODE- BASED OPTICAL RECORDING SYSTEMS CAI KUI (M Eng., National University of Singapore) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY... systems In particular, most of the key components of the PC -code- based optical recording system have been[r]

The semiconductor industry needs low dielectric constant (low k-value) materials to more advance microprocessor and chips by reducing the size of the device features. In fabricate this context, a new material with lower k value than conventional silica ( k = 3.9 - 4.2 ) is needed in order to improve[r]

.. .Analysis and Computation for Coupling Bose- Einstein Condensates in Optical Resonators Xu Wei Biao (B.Sc Sun Yat-Sen University of China) A THESIS SUBMITTED FOR THE DEGREE OF... Summary Since 1995, Bose- Einstein condensates (BEC) of alkali atoms have been produced and studied extensively in exp[r]

... coefficient of the trapped LiK molecules in the 2D dynamics of the optical lattice The loss rate due to the reaction is the product of this rate coefficient and the 2D density of the trapped... and the optical lattice, we obtain: 2 ωz,ol lc,g = = lc,ol ωz,g 8U0 m 2 2U0 mzR = 4π zR 4π w 02 = λ 2[r]

... Chapter Reflectivity based optofluidic switch based on cascading prisms Chapter Reflectivity based optofluidic switch based on cascading prisms 3.1 Conceptual design and optical principle for the optofluidic. .. [1][3-8] Optofluidic technology also enables the mass implementation of the optics c[r]

Entropy inequalities and quantum field theoryHoracio CasiniInstituto Balseiro, Centro Atomico Bariloche, ArgentinaEntanglement entropyArea law:«»C.Callan, F. Wilczek, hep-th/9401072Entropy inequalitiesTwo states, one regionPositivity and monotonicityof relative entropyEntropy bo[r]

... 1.6 Motivation and objective of the thesis The goal of this thesis is to design and fabricate 3D nanostructures, QDs and QRs on III- V compound semiconductors The fabrication of the 3D nanostructures. .. windows of lowest attenuation, viz 0.85 µm, 1.3 µm and 1.55 µm III- V semiconductor lasers u[r]