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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.
Excited State Spectroscopy of a Quantum Dot Molecule
11 Jan 2013 | Online Presentations | 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...
NEMO5 Tutorial 5A: Devi ce Simulation - Quantum Dots
17 Jul 2012 | Online Presentations | Contributor(s): Jean Michel D Sellier
This presentation introduces the capabilities of NEMO5 to simulate quantum dots.
Quantum Dot based Photonic Devices
01 Apr 2012 | Online Presentations | Contributor(s): Muhammad Usman
Deployment of nanometer-sized semiconductor quantum dots (QDs) in the active region of
photonic devices such as lasers, semiconductor optical amplifiers (SOA's), photo-detectors etc.
Polarization Response of Multi-layer InAs Quantum Dot Stacks
25 Oct 2011 | Online Presentations | 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,...
BME 695L Lecture 5: Nanomaterials for Core Design
03 Oct 2011 | Online Presentations | Contributor(s): James Leary
See references below for related reading.
5.1.1 core building blocks
The History of Semiconductor Heterostructures Research: From Early Double Heterostructure Concept to Modern Quantum Dot Structures
11 Jul 2011 | Online Presentations | 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...
Illinois ECE598XL Semiconductor Nanotechnology - 3 - Quantum Dots: Formation
27 Jun 2011 | Online Presentations | Contributor(s): Xiuling Li
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
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...
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...
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....
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 –...
Nanoelectronic Modeling Lecture 29: Introduction to the NEMO3D Tool
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...
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.
This lecture provides a very high level overview of quantum dots. The main issues and...
Nanoelectronic Modeling: Exercises 1-3 - Barrier Structures, RTDs, and Quantum Dots
27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck
Uses: Piece-Wise Constant Potential Barrier Tool
Resonant Tunneling Diodes
Uses: Resonant Tunneling Diode Simulation with NEGF
• Hartree calculation
Nanobiotechnology – a different perspective
0.0 out of 5 stars
22 Jul 2008 | Online Presentations | 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...
Nano Carbon: From ballistic transistors to atomic drumheads
5.0 out of 5 stars
14 May 2008 | Online Presentations | 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...
Bionanotechnology: a different perspective
30 Apr 2008 | Online Presentations | Contributor(s): Murali Sastry
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...
Nanoelectronic Modeling: Multimillion Atom Simulations, Transport, and HPC Scaling to 23,000 Processors
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...