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. Quantum dot transistor

    Q&A|Closed | Responses: 0

    Designing of quantum dot transistor.(single electron transistor).the source is connected to the drain via quantum dot, which acts as an island. The quantum dot is controlled by gate electrode.my...

    https://nanohub.org/answers/question/818

  2. Quantum Dot Lab Learning Materials

    Wiki

    By completing the Quantum Dot Lab, users will be able to a) understand the 3D confinement of carriers in a quantum dot, b) describe effects of geometry of a quantum dot on the energy states of...

    https://nanohub.org/wiki/QDotLab

  3. Maksym Plakhotnyuk

    https://nanohub.org/members/55289

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

    Q&A|Closed | Responses: 0

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

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

  5. how to calculate the power for quantum cells can anybody explain

    Q&A|Closed | Responses: 0

    https://nanohub.org/answers/question/778

  6. Quantitative Modeling and Simulation of Quantum Dots

    Presentation Materials | 18 Apr 2011 | 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 interpreted...

  7. Illinois Nano EP Seminar Series Spring 2010 - Lecture 8: Quantum Dot and Nanopore Lasers

    Online Presentations | 12 Apr 2011 | Contributor(s):: James J. Coleman

    We describe the growth, processing, and characteristics of self‐assembled and patterned quantum dot and nanopore lasers that exhibit interesting effects arising from reduction of the active medium to the quantum regime (

  8. Sergey Nikitaev

    https://nanohub.org/members/53982

  9. Tutorial 4b: Introduction to the NEMO3D Tool - Electronic Structure and Transport in 3D

    Online Presentations | 29 Mar 2011 | Contributor(s):: Gerhard Klimeck

    Electronic Structure and Transport in 3D - Quantum Dots, Nanowires and Ultra-Thin Body Transistors

  10. Quantum Dot Lab: First-Time User Guide

    Teaching Materials | 08 Feb 2011 | Contributor(s):: SungGeun Kim, Lynn Zentner

    This first-time user guide introduces the quantum dot lab tool. It includes an explanation of the input/output interface and the relationship between inputs and outputs of the quantum dot lab.NCN@Purdue[1] Gerhard Klimeck, Introduction to Quantum Dot Lab: https://www.nanohub.org/resources/4194[2]...

  11. Quantum Dot Wave Function (Quantum Dot Lab)

    Animations | 02 Feb 2011 | Contributor(s):: Gerhard Klimeck, David S. Ebert, Wei Qiao

    Electron density of an artificial atom. The animation sequence shows various electronic states in an Indium Arsenide (InAs)/Gallium Arsenide (GaAs) self-assembled quantum dot.

  12. Self-Assembled Quantum Dot Structure (pyramid)

    Animations | 02 Feb 2011 | Contributor(s):: Gerhard Klimeck, Insoo Woo, Muhammad Usman, David S. Ebert

    Pyramidal InAs Quantum dot. The quantum dot is 27 atomic monolayers wide at the base and 15 atomic monolayers tall.

  13. Quantum Dot Wave Function (still image)

    Animations | 31 Jan 2011 | Contributor(s):: Gerhard Klimeck, David S. Ebert, Wei Qiao

    Electron density of an artificial atom. The image shown displays the excited electron state in an Indium Arsenide (InAs) / Gallium Arsenide (GaAs) self-assembled quantum dot.

  14. Self-Assembled Quantum Dot Wave Structure

    Animations | 31 Jan 2011 | Contributor(s):: Gerhard Klimeck, Insoo Woo, Muhammad Usman, David S. Ebert

    A 20nm wide and 5nm high dome shaped InAs quantum dot grown on GaAs and embedded in InAlAs is visualized.

  15. Modeling the quantum dot growth in the continuum approximation

    Papers | 12 Jan 2011 | Contributor(s):: Peter Cendula

    Quantum dots can grow spontaneously during molecular beam epitaxy oftwo materials with different lattice parameters, Stranski-Krastanow growth mode.We study a mathematical model based on the continuum approximation of thegrowing layer in two dimensions. Nonlinear evolution equation is solved...

  16. Atomistic Modeling and Simulation Tools for Nanoelectronics and their Deployment on nanoHUB.org

    Online Presentations | 16 Dec 2010 | Contributor(s):: Gerhard Klimeck

    At the nanometer scale the concepts of device and material meet and a new device is a new material and vice versa. While atomistic device representations are novel to device physicists, the semiconductor materials modeling community usually treats infinitely periodic structures. Two electronic...

  17. Quantum dot - Design a laser

    Teaching Materials | 09 Nov 2010 | Contributor(s):: SungGeun Kim

    This document is a real-life problem for the quantum dot lab tool. Basic knowledge on the operation principle of a quantum dot laser is needed to solve this test. The test requires the tested person to be familar with the quantum dot lab tool.

  18. Test for Quantum Dot Lab tool

    Teaching Materials | 09 Nov 2010 | Contributor(s):: SungGeun Kim, Saumitra Raj Mehrotra

    This test is aimed at self-learning students or instructors who may be engaged in teaching classes related to the quantum dot lab tool.The level of this test should not be difficult for a student who has gone through "the general tutorial to quantum dots,""the introductory tutorial to the quantum...

  19. souvik ghosh

    an electronics and communication engineer graduate from West Bengal Board. Highly motivated and enthusiastic in learning and implementing new ideas. Presently working on improved design of quantum...

    https://nanohub.org/members/48829

  20. Nanoelectronic Modeling Lecture 34: Alloy Disorder in Quantum Dots

    Online Presentations | 05 Aug 2010 | Contributor(s):: Gerhard Klimeck, Timothy Boykin, Chris Bowen

    This presentation discusses the consequences of Alloy Disorder in strained InGaAs Quantum Dots Reminder of the origin of bandstructure and bandstructure engineeringWhat happens when there is disorder?Concept of disorder in the local bandstructureConfiguration noise, concentration noise,...