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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.

All Categories (21-40 of 188)

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

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

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

    http://nanohub.org/resources/11049

  2. Quantum Dot Wave Function (Quantum Dot Lab)

    02 Feb 2011 | Animations | 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.

    http://nanohub.org/resources/10751

  3. Self-Assembled Quantum Dot Structure (pyramid)

    02 Feb 2011 | Animations | 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.

    http://nanohub.org/resources/10730

  4. Quantum Dot Wave Function (still image)

    31 Jan 2011 | Animations | 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.

    http://nanohub.org/resources/10692

  5. Self-Assembled Quantum Dot Wave Structure

    31 Jan 2011 | Animations | 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.

    http://nanohub.org/resources/10689

  6. Modeling the quantum dot growth in the continuum approximation

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

    Quantum dots can grow spontaneously during molecular beam epitaxy of two materials with different lattice parameters, Stranski-Krastanow growth mode. We study a mathematical model based on the...

    http://nanohub.org/resources/10365

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

    16 Dec 2010 | Online Presentations | 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...

    http://nanohub.org/resources/10199

  8. Test for Quantum Dot Lab tool

    09 Nov 2010 | Teaching Materials | 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...

    http://nanohub.org/resources/9968

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

    05 Aug 2010 | Online Presentations | 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 engineering What happens when...

    http://nanohub.org/resources/9279

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

    04 Aug 2010 | Online Presentations | 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....

    http://nanohub.org/resources/9272

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

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

    This presentation demonstrates the importance of long-range strain in quantum dots Numerical analysis of the importance of the buffer around the central quantum dot - local band edges –...

    http://nanohub.org/resources/9270

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

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

    This presentation provides a very high level software overview of NEMO3D. The items discussed are: Modeling Agenda and Motivation Tight-Binding Motivation and basic formula...

    http://nanohub.org/resources/8599

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

    20 Jul 2010 | Online Presentations | 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...

    http://nanohub.org/resources/8598

  14. Nanotechnology Animation Gallery

    22 Apr 2010 | Teaching Materials | 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....

    http://nanohub.org/resources/8882

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

    Closed | Responses: 0

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

  16. 3D wavefunctions

    12 Apr 2010 | Animations | 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...

    http://nanohub.org/resources/8805

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

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

    NCN@illinois

    http://nanohub.org/resources/8422

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

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

    Exercises: Barrier Structures Uses: Piece-Wise Constant Potential Barrier Tool Resonant Tunneling Diodes Uses: Resonant Tunneling Diode Simulation with NEGF • Hartree calculation •...

    http://nanohub.org/resources/8259

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

    25 Jan 2010 | Courses | 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...

    http://nanohub.org/resources/8086

  20. Takuya Noguchi

    http://nanohub.org/members/39457

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