Physics of Current and Future Devices
27 Jun 2011 | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This set of powerpoint slides is part of a series Nanoelectronics and Modeling at the Nanoscale. It gives a glimpse on effects that occur in current and future nanoscale devices that have to be properly captured with appropriate physical models.
Physical and Mathematical Description of the Operation of Photodetectors
08 Jun 2010 | Teaching Materials | Contributor(s): Dragica Vasileska
This set of slides describes physical and mathematical description of the operation of photodetectors including important figures of merit.
Physical and Analytical Description of the Operation of a PN Diode
01 Jun 2010 | Teaching Materials | Contributor(s): Dragica Vasileska
A detailed physical and analytical description of the operation of PN diodes is given.vasileska.faculty.asu.eduNSF
Phonon Vibrations
11 Jul 2011 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
Vibrations of the crystalline lattice are explained on the examples of monoatomic and diatomic lattice.
Phonon Thermal Properties
Phonon Thermal Properties are discussed in this set of slides.
Periodic Potentials Exercise
16 Jun 2010 | Teaching Materials | Contributor(s): Gerhard Klimeck, Parijat Sengupta, Dragica Vasileska
In this exercise, various calculations of the electronic band structure of a one-dimensional crystal are performed with the Kronig-Penney (KP) model. This model has an analytical solution and therefore allows for simple calculations. More realistic models always require extensive numeric...
Periodic Potentials and the Kronig-Penney Model
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01 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska
This material describes the derivation of the Kronig-Penney model for delta-function periodic potentials.
Periodic Potentials and Bandstructure: an Exercise
02 Jul 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This exercise teaches the students that in the case of strong coupling between the neighboring wells in square and Coulomb periodic potential wells electrons start to behave as free electrons and the gaps that open at the Brillouin zone boundaries become smaller and smaller (thus recovering the...
PCPBT: Problem Assignment for Asymmetric Barriers
24 Jun 2009 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This example demonstrates to the students that for non-symmetric barriers which arise due to the imperfection of the molecular beam epitaxy process there is a reduction in the transmission coefficient and therefore current.
PCPBT Manual
01 Jun 2010 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This is a manual for the Piece-Wise Constant Potential Barrier Tool.
PCPBT Exercise - Symmetric Barriers
23 Jun 2009 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This exercise explores the nature of the quasi-bound states in a symmetric double barrier structure and how the broadening and the position of the quasi-bound states varies with the hidth and the height of the barriers.
Particle-Based Device Simulators Description
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28 Apr 2008 | Online Presentations | Contributor(s): Dragica Vasileska, Shaikh S. Ahmed, Gerhard Klimeck
In this presentation we give an overview of partcle-based device simulations with focus on implementation details.
Parallel Conduction Channel: an Exercise for 1D Heterostructure Lab
15 Aug 2008 | Teaching Materials | Contributor(s): Dragica Vasileska, Gerhard Klimeck
This exercise uses the 1-D Heterostructure Lab, which demonstrates that adding more dopants in the buffer layer becomes ineffective after certain critical doping density. Beyond this critical doping density, additional dopants practically fill in the parallel conduction channel that sits in the...
Padre
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12 Jan 2006 | Tools | Contributor(s): Mark R. Pinto, kent smith, Muhammad A. Alam, Steven Clark, Xufeng Wang, Gerhard Klimeck, Dragica Vasileska
2D/3D devices under steady state, transient conditions or AC small-signal analysis
Orthogonal Polynomials and Conductivity
28 Jun 2011 | Teaching Materials | Contributor(s): Dragica Vasileska
This set of handwritten notes is part of the Semiconductor Transport class.
Optimize Solar Cells
10 Feb 2011 | Teaching Materials | Contributor(s): Dragica Vasileska
In this presentation different avenues used to enhance the performance of solar cells are explained.
Open Systems
30 Jun 2008 | Teaching Materials | Contributor(s): Dragica Vasileska
This tutorial contains introductory material for Quantum Mechanics for Engineers with emphasis on tunneling, open systems and the definitions of transmission and reflection coefficients and their calculation in the case of piece-wise constant potential energy profiles.NSF
Numerical solution of the Drift-Diffusion Equations for a diode
28 May 2010 | Teaching Materials | Contributor(s): Dragica Vasileska
This material describes the implementation and also gives the source code for the numerical solution of the Drift-Diffusion equations for a PN Diode. The code can be easily generalized for any 2D or 3D device.
Numerical Analysis
02 Jun 2006 | Online Presentations | Contributor(s): Dragica Vasileska
Non-polar optical phonon scattering
These handwritten notes are part of the Semiconductor Transport class and describe non-polar optical phonon scattering.
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 postulated that peculiarities in the band structure of semiconductors would lead to the above phenomenon....
Nanotechnology: Yesterday, Today and Tomorrow
01 Sep 2008 | Online Presentations | Contributor(s): Dragica Vasileska
This presentation illustrates the development of nanotechnology from the birth of the transistor up to today and it also speculates what is going to happen in the future.
nanoHUB Used in Research: A One Developer/User View
03 Sep 2015 | Online Presentations | Contributor(s): Dragica Vasileska
In this presentation I will give overview of selected nanoHUB tools and their potential for performing state- of-the-art research. The tools selected for this purpose include SCHRED, QuaMC2D, and OMEN nanowire/ NEMO5. ...
Nanoelectronics and Modeling at the Nanoscale
30 Jun 2011 | Series | Contributor(s): Dragica Vasileska, Gerhard Klimeck
Nanoelectronics refers to the use of nanotechnology on electronic components, especially transistors. Although the term nanotechnology is generally defined as utilizing technology less than 100 nm in size, nanoelectronics sometimes refers to transistor devices that are so small that inter-atomic...
Nanoelectronic Modeling Lecture 14: Open 1D Systems - Formation of Bandstructure
25 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Dragica Vasileska
The infinite periodic structure Kroenig Penney model is often used to introduce students to the concept of bandstructure formation. It is analytically solvable for linear potentials and shows critical elements of bandstructure formation such as core bands and different effective masses in...