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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.
Introduction to Coulomb Blockade Lab
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31 Mar 2008 | Teaching Materials | 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...
Coulomb Blockade Simulation
31 Mar 2008 | Tools | Contributor(s): Xufeng Wang, Bhaskaran Muralidharan, Gerhard Klimeck
Simulate Coulomb Blockade through Many-Body Calculations in a single and double quantum dot system
Introduction to Quantum Dot Lab
4.5 out of 5 stars
31 Mar 2008 | Online Presentations | Contributor(s): Sunhee Lee, Hoon Ryu, Gerhard Klimeck
The nanoHUB tool "Quantum Dot Lab" allows users to compute the quantum mechanical "particle in a box" problem for a variety of different
confinement shapes, such as boxes, ellipsoids, disks, and...
Quantum Dot Spectra, Absorption, and State Symmetry: an Exercise
30 Mar 2008 | Teaching Materials | Contributor(s): Gerhard Klimeck
The tutorial questions based on the Quantum Dot Lab v1.0 available online at Quantum Dot Lab. Students are asked to explore the various different quantum dot shapes, optimize the intra-band...
Nanoelectronic Modeling: Multimillion Atom Simulations, Transport, and HPC Scaling to 23,000 Processors
5.0 out of 5 stars
07 Mar 2008 | Online Presentations | Contributor(s): Gerhard Klimeck
Future field effect transistors will be on the same length scales as “esoteric” devices such as quantum dots,
nanowires, ultra-scaled quantum wells, and resonant tunneling diodes. In those...
MCW07 Physics of Contact Induced Current Asymmetry in Transport Through Molecules
25 Feb 2008 | Online Presentations | Contributor(s): Bhaskaran Muralidharan, Owen D. Miller, Neeti Kapur, Avik Ghosh, Supriyo Datta
We first outline the qualitatively different physics involved in the charging-induced current asymmetries in molecular conductors operating in the strongly coupled (weakly interacting)...
Path Integral Monte Carlo
15 Jan 2008 | Tools | Contributor(s): John Shumway, Matthew Gilbert
Development of a Nanoelectronic 3-D (NEMO 3-D ) Simulator for Multimillion Atom Simulations and Its Application to Alloyed Quantum Dots
14 Jan 2008 | Papers | Contributor(s): Gerhard Klimeck, Timothy Boykin
Material layers with a thickness of a few nanometers are common-place in today’s semiconductor
devices. Before long, device fabrication methods will reach a point at which the other two...
Finite Size Scaling and Quantum Criticality
02 Jan 2008 | Online Presentations | Contributor(s): Sabre Kais
In statistical mechanics, the finite size scaling method provides a systematic way to extrapolate information about criticality obtained from a finite system to the thermodynamic limit. For...
NanoElectronic MOdeling: NEMO
20 Dec 2007 | Online Presentations | Contributor(s): Gerhard Klimeck
This presentation was one of 13 presentations in the one-day forum, "Excellence in Computer Simulation," which brought together a broad set of experts to reflect on the future of computational...
Engineering Nanomedical Systems
16 Nov 2007 | Online Presentations | Contributor(s): James Leary
This tutorial will cover general problems and approaches to the design of engineered nanomedical systems. An example to be covered is the engineering design of programmable multilayered...
Engineering at the nanometer scale: Is it a new material or a new device?
06 Nov 2007 | Online Presentations | Contributor(s): Gerhard Klimeck
This seminar will overview NEMO 3D simulation capabilities and its deployment on the nanoHUB as well as an overview of the nanoHUB impact on the community.
KIST/PU Multi-Component, Multi-Functional Nanomedical Systems for Drug/Gene Delivery
23 Oct 2007 | Online Presentations | Contributor(s): James Leary
In this brief paper we describe some of our recent efforts to construct multi-component, multi-functional nanomedical systems for delivery of therapeutic genes. We first describe the general...
MCW07 Simple Models for Molecular Transport Junctions
13 Sep 2007 | Online Presentations | Contributor(s): Misha Galperin, Abraham Nitzan, Mark A. Ratner
We review our recent research on role of interactions in molecular transport junctions. We consider simple models within nonequilibrium Green function approach (NEGF) in steady-state regime.
Micro-scaled Biochips with Optically Active Surfaces for Near and Far-field Analysis of Cellular Fluorescence
31 Aug 2007 | Online Presentations | Contributor(s): Huw Summers
The integration of thin (< 100 nm) metal films with micro-scale
optical waveguides provides a route to controlled spatial
excitation of cellular fluorescence within a biochip...
Quantum Dot Lab Learning Module: An Introduction
02 Jul 2007 | Series | Contributor(s): James K Fodor, Jing Guo
THIS MATERIAL CORRESPONDS TO AN OLDER VERSION OF QUANTUM DOT LAB THAN CURRENTLY AVAILABLE ON nanoHUB.org.
Quantum Dot - synthesis routes
03 Apr 2007 | Downloads | Contributor(s): Saurabh Madaan
A brief survey of synthesis routes of quantum dots, with more emphasis on epitaxial and colloidal approaches.
What Can the TEM Tell You About Your Nanomaterial?
26 Feb 2007 | Online Presentations | Contributor(s): Eric Stach
In this tutorial, I will present a brief overview of the ways that transmission electron microscopy can be used to characterize nanoscale materials. This tutorial will emphasize what TEM does...
Atomistic Alloy Disorder in Nanostructures
26 Feb 2007 | Online Presentations | Contributor(s): Gerhard Klimeck
Electronic structure and quantum transport simulations are typically performed in perfectly ordered semiconductor structures. Bands and modes are defined resulting in quantized conduction and...
Surprises on the nanoscale: Plasmonic waves that travel backward and spin birefringence without magnetic fields
29 Jan 2007 | Online Presentations | Contributor(s): Daniel Neuhauser
As nanonphotonics and nanoelectronics are pushed down towards the
molecular scale, interesting effects emerge. We discuss how
birefringence (different propagation of two polarizations) is...