Tags: quantum dots

Description

Quantum dots have a small, countable number of electrons confined in a small space. Their electrons are confined by having a tiny bit of conducting material surrounded on all sides by an insulating material. If the insulator is strong enough, and the conducting volume is small enough, then the confinement will force the electrons to have discrete (quantized) energy levels. These energy levels can influence the device behavior at a macroscopic scale, showing up, for example, as peaks in the conductance. Because of the quantized energy levels, quantum dots have been called "artificial atoms." Neighboring, weakly-coupled quantum dots have been called "artificial molecules."

Learn more about quantum dots from the many resources on this site, listed below. More information on Quantum dots can be found here.

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  1. Sarah White

    http://nanohub.org/members/99730

  2. Structure and Morphology of Silicon Germanium Thin Films

    30 Dec 2013 | Contributor(s):: Brian Demczyk

    Single layer silicon and germanium films as well as nominally 50-50 silicon-germanium alloys were deposited on single crystal silicon and germanium (001) and (111) substrates by ultrahigh vacuum chemical vapor deposition. These films spanned the range of + 4 % film-substrate lattice mismatch. A...

  3. Ali Khaledi Nasab

    I am Ali, MSc of Physics. I am working on modelling of QDs. I will start my PhD next fall (2014). Now I am searching to find a proper 3D model to investigate the QDs.

    http://nanohub.org/members/93425

  4. What is the effective mass of electron in InN (Quantum Dot)?

    Closed | Responses: 0

    I am working with InN QD. I need to know the actual electron effective mass in http://nanohub.org/answers/question/1193

  5. Excited State Spectroscopy of a Quantum Dot Molecule

    11 Jan 2013 | | Contributor(s):: Muhammad Usman

    Atomistic electronic structure calculations are performed to study the coherent inter-dot couplings of the electronic states in a single InGaAs quantum dot molecule. The experimentally observed excitonic spectrum by Krenner et al (Phys. Rev. Lett. 94 057402, 2005) is quantitatively reproduced,...

  6. Prasad Sarangapani

    Prasad Sarangapani is a PhD candidate in the Department of Electrical and Computer Engineering at Purdue University. He is a member of the NEMO (Nanoelectronics Modeling) group headed by...

    http://nanohub.org/members/72949

  7. Quantum Dot Quantum Computation Simulator

    04 Aug 2012 | | Contributor(s):: Brian Sutton

    Performs simulations of quantum dot quantum computation using a model Hamiltonian with an on-site magnetic field and modulated inter-dot exchange interaction.

  8. Valerie Ding

    http://nanohub.org/members/69202

  9. NEMO5 Tutorial 5A: Devi ce Simulation - Quantum Dots

    17 Jul 2012 | | Contributor(s):: Jean Michel D Sellier

    This presentation introduces the capabilities of NEMO5 to simulate quantum dots.

  10. Quantum Dot based Photonic Devices

    19 Mar 2012 | | Contributor(s):: Muhammad Usman

    Deployment of nanometer-sized semiconductor quantum dots (QDs) in the active region ofphotonic devices such as lasers, semiconductor optical amplifiers (SOA's), photo-detectors etc.for the next generation communication systems offers unique characteristics such astemperature-insensitivity, high...

  11. TÃœLAY OCAK

    http://nanohub.org/members/62481

  12. emiley krystine herbert

    '''----== ^,,Hello My name's Emiley Krystine. I'm fifteen years old and i'm a freshmen in high school. I am very interested in science. My favorite subjects are Nanotechnology, Astrophysics,...

    http://nanohub.org/members/61913

  13. NEMO3D User Guide for Quantum Dot Simulations

    29 Nov 2011 | | Contributor(s):: M. Usman, Gerhard Klimeck

    NEMO 3D is a large and complex simulator; and understanding of its source code requires considerable knowledge of quantum mechanics, condensed matter theory, and parallel programming.

  14. Polarization Response of Multi-layer InAs Quantum Dot Stacks

    20 Oct 2011 | | Contributor(s):: Muhammad Usman

    Recent experimental measurements, without any theoretical guidance, showed that isotropic polarization response can be achieved by increasing the number of QD layers in a QD stack. In this work, we analyse the polarization response of multi-layer quantum dot stacks containing up to nine quantum...

  15. BME 695L Lecture 5: Nanomaterials for Core Design

    14 Sep 2011 | | Contributor(s):: James Leary

    See references below for related reading.5.1      Introduction5.1.1    core building blocks5.1.2    functional cores5.1.3    functionalizing the core surface5.2      Ferric...

  16. The History of Semiconductor Heterostructures Research: From Early Double Heterostructure Concept to Modern Quantum Dot Structures

    21 Jun 2011 | | Contributor(s):: Zhores I. Alferov

    It would be very difficult today to imagine solid-state physics without semiconductor heterostructures. Semiconductor heterostructures and especially double heterostructures, including quantum wells, quantum wires and quantum dots, currently comprise the object of investigation of two thirds of...

  17. Illinois ECE598XL Semiconductor Nanotechnology - 3 - Quantum Dots: Formation

    15 Jun 2011 | | Contributor(s):: Xiuling Li

  18. Maksym Plakhotnyuk

    http://nanohub.org/members/55289

  19. with what equations I can calculate photoluminescence spectra of Quantum Dots?

    Closed | Responses: 0

    I want to find theoretically photo and electro luminescence of self assembled InAs/GaAs QDs in a PIN diode...

    http://nanohub.org/answers/question/779

  20. Quantitative Modeling and Simulation of Quantum Dots

    16 Jul 2010 | | Contributor(s):: Muhammad Usman

    Quantum dots grown by self-assembly process are typically constructed by 50,000 to 5,000,000 structural atoms which confine a small, countable number of extra electrons or holes in a space that is comparable in size to the electron wavelength. Under such conditions quantum dots can be...