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Quantum dots (also know as “artifical atoms”) can be produced in a variety of material systems and geometries. This simple educational tool simulates the particle in a box problem for a variety of geometries such as boxes, cylinders, pyramids, and ellipsoids. A simple single band effective mass model is employed and the simulations run interactively. 3-D visualization depicts the 3-D confined wave functions. Optical transitions are computed and sorted into dark and light lines. Absorption curves are computed for different polarizations and orientations. Parameters such as incident light angle and polarization, Fermi level, or temperature can be scanned to analyze the effect of 3-D geometries on isotropic optical properties.
This tool is supported by variety of different materials:
A general tutorial entitled “Quantum Dots” on the origin of quantum mechanics and the interpretation of quantum dots as artificial atoms.
An introductory tutorial to the tool “Introduction to Quantum Dot Lab” with usage scenarios on state filling, light/dark absorption lines, and absorption coefficients.
An second introductory tutorial to the tool “Introduction to Quantum Dot Lab” with simple usage scenarios.
An homework / project assignment entitled “Homework Exercise on Quantum Dot Spectra, Absorption, and State Symmetry”.
NEMO 3-D is an open source quantum dot simulation tool which contains a variety of different material and geometry models. Most of these models require significant computational power and are not appropriate for a learning module. More information on NEMO 3-D can be found on Gerhard Klimeck's web page http://dynamo.ecn.purdue.edu/~gekco/nemo3D
Cite this work
Researchers should cite this work as follows:
- "Development of a Nanoelectronic 3-D (NEMO 3-D) Simulator for Multimillion Atom Simulations and Its Application to Alloyed Quantum Dots" (INVITED), Gerhard Klimeck, Fabiano Oyafuso, Timothy B. Boykin, R. Chris Bowen, and Paul von Allmen, Computer Modeling in Engineering and Science (CMES) Volume 3, No. 5 pp 601-642 (2002).