Find information on common issues.
Ask questions and find answers from other users.
Suggest a new site feature or improvement.
Check on status of your tickets.
Note: Results do not include pending, unpublished, and some private items.
Why quantum dot simulation domain must contain multi-million atoms?
Ranking is calculated from a formula comprised of user reviews and usage data. Learn more ›
11 Jan 2013 | Online Presentations | Contributor(s): Muhammad Usman
The InGaAs quantum dots obtained from the self-assembly growth process are heavily strained. The long-range strain and piezoelectric fields significantly modifies the electronic structure of the …
DBR Laser Simulator
07 Sep 2012 | Tools | Contributor(s): Nikhil Sancheti, Lynford Goddard, Christopher Adam Edwards
Describes properties of a GaAs/AlGaAs DBR laser
Quantitative Modeling and Simulation of Quantum Dots
16 Jul 2010 | 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 …
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.
Self-Assembled Quantum Dot Structure (pyramid)
01 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.
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.
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.
How extensively have nanoparticles been tested in the field of solar cells?
Closed | Responses: 2
I have seen research that has included silver nanoparticles placed in the wafers of Si. I've also seen GaN and GaAs mentioned in nanoparticle study, but havn't seen the acual papers. I was …
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 …
Is there a self-consistent schrodinger-poisson solver on nanohub?
Closed | Responses: 0
I'm new to nanohub, and I'm looking for a self-consistent schrodinger-poisson solver that can simulate GaAs/AlGaAs heterostructures (both n and p type). I found two programs, but neither seems to be …
Rode's Method: Theory and Implementation
01 Jul 2010 | Teaching Materials | Contributor(s): Dragica Vasileska
This set of teaching materials provides theoretical description of the Rode's method for the low field mobility calculation that is accompanied with a MATLAB code for the low field mobility …
Negative Differential Resistivity Exercise
28 Jun 2010 | Teaching Materials | Contributor(s): Gerhard Klimeck, Parijat Sengupta, Dragica Vasileska
In certain semiconductors such as GaAs and InP the average velocity as a function of field strength displays a maximum followed by a regime of decreasing velocity. Hilsum, Ridley, and Watkins …
Bulk Monte Carlo: Implementation Details and Source Codes Download
01 Jun 2010 | Teaching Materials | Contributor(s): Dragica Vasileska, Stephen M. Goodnick
The Ensemble Monte Carlo technique has been used now for over 30 years as a numerical method to simulate nonequilibrium transport in semiconductor materials and devices, and has been the subject of …
Electronic band structure
09 Apr 2010 | Animations | Contributor(s): Saumitra Raj Mehrotra, Gerhard Klimeck
In solid-state physics, the electronic band structure (or simply band structure) of a solid describes ranges of energy in which an electron is "forbidden" or "allowed". The band structure is also …
Comparison of PCPBT Lab and Periodic Potential Lab
04 Aug 2009 | Online Presentations | Contributor(s): Abhijeet Paul, Samarth Agarwal, Gerhard Klimeck, Junzhe Geng
This small presentation provides information about the comparison performed for quantum wells made of GaAs and InAs in two different tools. This has been done to benchmark the results from completely …
Bulk Monte Carlo Code Described
01 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska
In this tutorial we give implementation details for the bulk Monte Carlo code for calculating the electron drift velocity, velocity-field characteristics and average carrier energy in bulk GaAs …
Research in nanotechnology is taking place at an exponential rate, since last five years engineers, academicians, researchers and students are talking about nanotechnology and lots of seminars, …
nanoHUB.org, a resource for nanoscience and nanotechnology, is supported by the National Science Foundation and other funding agencies.