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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. Nanoelectronic Modeling Lecture 32: Strain Layer Design through Quantum Dot TCAD

    Online Presentations | 04 Aug 2010 | Contributor(s):: Gerhard Klimeck, Muhammad Usman

    This presentation demonstrates the utilization of NEMO3D to understand complex experimental data of embedded InAs quantum dots that are selectively overgrown with a strain reducing InGaAs layer. Different alloy concentrations of the strain layer tune the optical emission and absorption wavelength...

  2. Nanoelectronic Modeling Lecture 31a: Long-Range Strain in InGaAs Quantum Dots

    Online Presentations | 04 Aug 2010 | Contributor(s):: Gerhard Klimeck

    This presentation demonstrates the importance of long-range strain in quantum dotsNumerical analysis of the importance of the buffer around the central quantum dot - local band edges – vertical and horizontal extension of the bufferControlled overgrowth can tune the electron energies in the...

  3. Nanoelectronic Modeling Lecture 29: Introduction to the NEMO3D Tool

    Online Presentations | 04 Aug 2010 | Contributor(s):: Gerhard Klimeck

    This presentation provides a very high level software overview of NEMO3D. The items discussed are:Modeling Agenda and MotivationTight-Binding Motivation and basic formula expressionsTight binding representation of strainSoftware structureNEMO3D algorithm flow NEMO3D parallelization scheme –...

  4. Nanoelectronic Modeling Lecture 28: Introduction to Quantum Dots and Modeling Needs/Requirements

    Online Presentations | 20 Jul 2010 | Contributor(s):: Gerhard Klimeck

    This presentation provides a very high level software overview of NEMO1D.Learning Objectives:This lecture provides a very high level overview of quantum dots. The main issues and questions that are addressed are:Length scale of quantum dotsDefinition of a quantum dotQuantum dot examples and...

  5. Nanotechnology Animation Gallery

    Teaching Materials | 22 Apr 2010 | Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck

    Animations and visualization are generated with various nanoHUB.org tools to enable insight into nanotechnology and nanoscience. Click on image for detailed description and larger image download. Additional animations are also...

  6. Analytically how to find the energy states for an ellipsoidal Quantum Dot?

    Q&A|Closed | Responses: 0

    https://nanohub.org/answers/question/521

  7. 3D wavefunctions

    Animations | 12 Apr 2010 | Contributor(s):: Saumitra Raj Mehrotra, Gerhard Klimeck

    In quantum mechanics the time-independent Schrodinger's equation can be solved for eigenfunctions (also called eigenstates or wave-functions) and corresponding eigenenergies (or energy levels) for a stationary physical system. The wavefunction itself can take on negative and positive values and...

  8. Illinois ABE 446 Lecture 3: Quantum Dots and Polymers

    Teaching Materials | 11 Feb 2010 | Contributor(s):: Kaustubh Bhalerao

  9. Nanoelectronic Modeling: Exercises 1-3 - Barrier Structures, RTDs, and Quantum Dots

    Online Presentations | 27 Jan 2010 | Contributor(s):: Gerhard Klimeck

    Exercises:Barrier StructuresUses: Piece-Wise Constant Potential Barrier ToolResonant Tunneling DiodesUses: Resonant Tunneling Diode Simulation with NEGF • Hartree calculation • Thomas Fermi potentialQuantum DotsUses: Quantum Dot Lab • pyramidal dot

  10. Nanoelectronic Modeling: From Quantum Mechanics and Atoms to Realistic Devices

    Courses | 25 Jan 2010 | Contributor(s):: Gerhard Klimeck

    The goal of this series of lectures is to explain the critical concepts in the understanding of the state-of-the-art modeling of nanoelectronic devices such as resonant tunneling diodes, quantum wells, quantum dots, nanowires, and ultra-scaled transistors. Three fundamental concepts critical to...

  11. Takuya Noguchi

    https://nanohub.org/members/39457

  12. NEMO3D

    Wiki

    For now this page is a rather empty place holder for references on nanoHUB to the NEMO3D tool. There is a more complete NEMO3D web page that is maintained by the Nanoelectronic Modeling Group of...

    https://nanohub.org/wiki/NEMO3D

  13. Quantum Dot Lab Demonstration: Pyramidal Qdots

    Animations | 11 Jun 2009 | Contributor(s):: Gerhard Klimeck, Benjamin P Haley

    This video shows the simulation and analysis of a pyramid-shaped quantum dot using Quantum Dot Lab. Several powerful analytic features of this tool are demonstrated.

  14. Morteza Sasani Ghamsari

    https://nanohub.org/members/33804

  15. Thermoelectric Power Factor Calculator for Nanocrystalline Composites

    Tools | 18 Oct 2008 | Contributor(s):: Terence Musho, Greg Walker

    Quantum Simulation of the Seebeck Coefficient and Electrical Conductivity in a 2D Nanocrystalline Composite Structure using Non-Equilibrium Green's Functions

  16. How do I interpret CV measurements of self-assembled quantum dot stacks?

    Q&A|Closed | Responses: 0

    I’ve been reading papers where CV measurements of stacks of self-assembled quantum dots are used to characterise the energy levels in the dots. I am at a loss to interpret the plots. For...

    https://nanohub.org/answers/question/129

  17. Nanobiotechnology – a different perspective

    0.0 out of 5 stars 

    Online Presentations | 22 Jul 2008 | Contributor(s):: Murali Sastry

    The study of the synthesis, exotic properties, assembly/packaging and potential commercial application of nanomaterials is an extremely important topic of research that is expected to have far-reaching global impact. The focus of my talk will be on an emerging branch of nanotechnology that...

  18. Nano Carbon: From ballistic transistors to atomic drumheads

    5.0 out of 5 stars 

    Online Presentations | 14 May 2008 | Contributor(s):: Paul L. McEuen

    Carbon takes many forms, from precious diamonds to lowly graphite. Surprisingly, it is the latter that is the most prized by nano physicists. Graphene, a single layer of graphite, can serve as an impenetrable membrane a single atom thick. Rolled up into a nanometer-diameter cylinder--a carbon...

  19. Bionanotechnology: a different perspective

    0.0 out of 5 stars 

    Online Presentations | 30 Apr 2008 | Contributor(s):: Murali Sastry

    The study of the synthesis, exotic properties, assembly/packaging and potential commercial application of nanomaterials is an extremely important topic of research that is expected to have far-reaching global impact. The focus of my talk will be on an emerging branch of nanotechnology that...

  20. Introduction to Coulomb Blockade Lab

    0.0 out of 5 stars 

    Teaching Materials | 31 Mar 2008 | Contributor(s):: Bhaskaran Muralidharan, Xufeng Wang, Gerhard Klimeck

    The tutorial is based on the Coulomb Blockade Lab available online at Coulomb Blockade Lab. Students are introduced to the concepts of level broadening and charging energies in artificial atoms (single quantum dots) and molecules (coupled quantum dots).A tutorial level introduction to the...