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. for the next …

http://nanohub.org/resources/13532

NEMO3D User Guide for Quantum Dot Simulations

29 Nov 2011 | Publications | Contributor(s): M. Usman, Gerhard Klimeck

NEMO 3D is a large and complex simulator; and understanding of its source code requires considerable knowledge of quantum mechanics, condensed matter theory, and parallel programming.

http://nanohub.org/resources/12593

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, we …

http://nanohub.org/resources/12312

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 Introduction 5.1.1 core building blocks 5.1.2 functional cores 5.1.3 functionalizing the core surface 5.2 Ferric oxide …

http://nanohub.org/resources/12057

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 wells, …

http://nanohub.org/resources/11436

Illinois ECE598XL Semiconductor Nanotechnology - 3 - Quantum Dots: Formation

27 Jun 2011 | Online Presentations | Contributor(s): Xiuling Li

http://nanohub.org/resources/11404

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

Closed | Responses: 0

I want to find theoretically photo and electro luminescence of self assembled InAs/GaAs QDs in a PIN diode structure. so far I calculate wave functions and energy levels of QD using 8 band k.p model. …

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

Quantitative Modeling and Simulation of Quantum Dots

18 Apr 2011 | Notes | 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 …

http://nanohub.org/resources/9332

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

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

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

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

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

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

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

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 student …

http://nanohub.org/resources/9968

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 there is …

http://nanohub.org/resources/9279