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Semiconductor quantum dots

Xem 1-13 trên 13 kết quả Semiconductor 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 vectors and the energies of the stationary states of the system in the regime of the optical resonance are derived. The Rabi oscillations of the electron populations at different levels as well as the Rabi splitting of the peaks in the photon emission spectra are investigated.

    pdf21p 12120609 01-06-2020 0 0   Download

  • In this paper we present the construction of a highly sensitive FCS instrument and the measurement results from a sample of semiconductor quantum dots. We provide the analysis procedure for determining the hydrodynamic radius of the quantum dots and compare the results with the ones obtained directly from electron microscope imaging. The good agreement indicates the reliability of the FCS technique and open the way for further applications of this technique in studying nanoparticles.

    pdf7p thuyliebe 09-10-2018 14 0   Download

  • Tuyển tập các báo cáo nghiên cứu khoa học ngành toán học được đăng trên tạp chí toán học quốc tế đề tài: Strong coupling among semiconductor quantum dots induced by a metal nanoparticle

    pdf19p dauphong11 04-02-2012 30 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Strong coupling among semiconductor quantum dots induced by a metal nanoparticle

    pdf19p sting07 16-02-2012 35 2   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Coherent optical spectroscopy in a biological semiconductor quantum dot-DNA hyb

    pdf23p dauphong17 21-02-2012 33 2   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Investigation of Semiconductor Quantum Dots for Waveguide Electroabsorption Modula

    pdf5p sting09 21-02-2012 41 2   Download

  • Two-colour three-pulse nonlinear spectroscopy can be used to study the dynamics of excited carriers in Si quantum dot structures embedded in SiN. Decays of the transverse optical phonon population and the transverse acoustic phonon population are measured and discussed. A theoretical simulation is also performed to support interpretation of our experimental observations.

    pdf6p 12120609 23-03-2020 4 0   Download

  • This book is a collection of some of the invited talks presented at the international meeting held at the Max Planck Institut fiir Physik komplexer Systeme, Dresden, Germany during August 6-30, 2001, on the rapidly developing field of nanoscale science and bio-electronics (http://www.mpipks-dresden.mpg.de/~nanobio/). Semiconductor physics has experienced unprecedented developments over the second half of the twentieth century. The exponential growth in microelectronic processing power and the size of dynamic memories has been achieved by significant downscahng of the minimum feature size.

    pdf363p chuyenphimbuon 21-07-2012 49 11   Download

  • This book deals with theoretical and experimental aspects of solid-state lasers, including optimum waveguide design of end pumped and diode pumped lasers. Nonlinearity, including the nonlinear conversion, up frequency conversion and chirped pulse oscillators are discussed. Some new rare-earth-doped lasers, including double borate and halide crystals, and feedback in quantum dot semiconductor nanostructures are included.

    pdf0p cucdai_1 16-10-2012 34 5   Download

  • Okuyama et al. Nanoscale Research Letters 2011, 6:351 http://www.nanoscalereslett.com/content/6/1/351 NANO EXPRESS Open Access Magnetoluminescence from trion and biexciton in type-II quantum dot Rin Okuyama*, Mikio Eto and Hiroyuki Hyuga Abstract We theoretically investigate optical Aharonov-Bohm (AB) effects on trion and biexciton in the type-II semiconductor quantum dots, in which holes are localized near the center of the dot, and electrons are confined in a ring structure formed around the dot. Many-particle states are calculated numerically by the exact diagonalization method.

    pdf6p dauphong13 09-02-2012 38 4   Download

  • Luminescence .is .the .spontaneous .emission .of .light .from .the .excited .electronic .states .of .physical .systems. The .emission .is .preceded .by .the .process .of .excitation, .which .may .be .produced .by .a .variety .of .agents. .If .it .is .achieved .by .the .absorption .of .light .it .is .called .photoluminescence, .if .by .the .action .of .an .electric .field .electroluminescence, .if .by .a .chemical .reaction .chemiluminescence, .and .so .on. Following .the .excitation, .if .the .system .is .left .alone .without .any .additional .influence .from .the .exciting .agent, .it .

    pdf0p thienbinh1311 13-12-2012 26 2   Download

  • Cd1-xMnxS nanoparticles (NPs) with size quantum confinement belong to the diluted magnetic semiconductor (DMS) quantum dot (QD) class of materials that has been widely studied in the last few years. The study of quasi-zero-dimensional Diluted Magnetic Semiconductors (DMS), such as Cd1-xMnxS Quantum Dots (QDs), is strongly motivated due to the localization of magnetic ions in the same places as the free-like electron and hole carriers occurring in these nanomaterials [1,2].

    pdf208p maket1311 16-10-2012 32 6   Download

  • There is growing concern about the safety of engineered nanoparticles, which are produced for various industrial applications. Quantum dots are colloidal semiconductor nanoparticles that have unique luminescence char-acteristics and the potential to become attractive tools for medical imaging. However, some of these particles can cause oxidative stress and induce cell death.

    pdf14p viettel02 20-02-2013 18 1   Download

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