Application of the nanoHUB tools in the Classroom

28 Jul 2011 | Online Presentations | Contributor(s): Dragica Vasileska

This online presentation describes the application of the nanoHUB tools in the classroom.

Research Within Vasileska Group

29 Jun 2010 | Online Presentations | Contributor(s): Dragica Vasileska

This presentation outlines recent progress in reseach within Vasileska group in the area of random telegraph noise and thermal modeling, and modeling of GaN HEMTs.

Nanoelectronic Modeling Lecture 14: Open 1D Systems - Formation of Bandstructure

27 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 …

Nanoelectronic Modeling Lecture 12: Open 1D Systems - Transmission through Double Barrier Structures - Resonant Tunneling

27 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Dragica Vasileska

This presentation shows that double barrier structures can show unity transmission for energies BELOW the barrier height, resulting in resonant tunneling. The resonance can be associated with a quasi bound state, and the bound state can be related to a simple particle in a box calculation.

Nanoelectronic Modeling Lecture 09: Open 1D Systems - Reflection at and Transmission over 1 Step

25 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Dragica Vasileska, Samarth Agarwal

One of the most elemental quantum mechanical transport problems is the solution of the time independent Schrödinger equation in a one-dimensional system where one of the two half spaces has a higher potential energy than the other. The analytical solution is readily obtained using a scattering …

Nanoelectronic Modeling Lecture 02: (NEMO) Motivation and Background

25 Jan 2010 | Online Presentations | Contributor(s): Gerhard Klimeck, Dragica Vasileska

Fundamental device modeling on the nanometer scale must include effect of open systems, high bias, and an atomistic basis. The non-equilibrium Green Function Formalism (NEGF) can include all these components in a fundamentally sound approach and has been the basis for a few novel device simulation …

Nanoelectronic Modeling Lecture 11: Open 1D Systems - The Transfer Matrix Method

31 Dec 2009 | Online Presentations | Contributor(s): Gerhard Klimeck, Dragica Vasileska, Samarth Agarwal, Parijat Sengupta

The transfer matrix approach is analytically exact, and “arbitrary” heterostructures can apparently be handled through the discretization of potential changes. The approach appears to be quite appealing. However, the approach is inherently unstable for realistically extended devices which …

Nanoelectronic Modeling Lecture 10: Open 1D Systems - Transmission through & over 1 Barrier

31 Dec 2009 | Online Presentations | Contributor(s): Gerhard Klimeck, Dragica Vasileska, Samarth Agarwal

Tunneling and interference are critical in the understanding of quantum mechanical systems. The 1D time independent Schrödinger equation can be easily solved analytically in a scattering matrix approach for a system of a single potential barrier. The solution is obtained by matching wavefunction …

Quantum and Thermal Effects in Nanoscale Devices

18 Sep 2008 | Online Presentations | Contributor(s): Dragica Vasileska

To investigate lattice heating within a Monte Carlo device simulation framework, we simultaneously solve the Boltzmann transport equation for the electrons, the 2D Poisson equation to get the self-consistent fields and the hydrodynamic equations for acoustic and optical phonons. The phonon …

Is dual gate device structure better from a thermal perspective?

01 Sep 2008 | Online Presentations | Contributor(s): Dragica Vasileska, Stephen M. Goodnick

This presentation illustrates several points. First, it is shown that in nanoscale devices there is less degradation due to heating effects due to non-stationary nature of the carrier transport (velocity overshoot) in the device, which, in turn, makes less probable the interaction with phonons. …

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.

BJT Operation Description

18 Jul 2008 | Online Presentations | Contributor(s): Dragica Vasileska

This set of powerpoint slides is ment for undergraduate and first year graduate students and describe the basic principles of operation of Bipolar Junction Transistor.www.eas.asu.edu/~vasileskNSF Career

MOSFET Operation Description

18 Jul 2008 | Online Presentations | Contributor(s): Dragica Vasileska

This set of slides gives the students basic understanding of MOSFET operation description.www.eas.asu.edu/~vasileskNSF Career

MOS Capacitors: Theory and Modeling

18 Jul 2008 | Online Presentations | Contributor(s): Dragica Vasileska

These slides can help users acquire a basic understanding of Metal-Oxide-Semiconductor (MOS) capacitors.

Why QuaMC 2D and Particle-Based Device Simulators?

02 May 2008 | Online Presentations | Contributor(s): Dragica Vasileska, Shaikh S. Ahmed, Gerhard Klimeck

We describe the need for particle-based device simulators when modeling nanoscale devices.

Examples for QuaMC 2D particle-based device Simulator Tool

10 May 2008 | Online Presentations | Contributor(s): Dragica Vasileska, Shaikh S. Ahmed, Gerhard Klimeck

We provide three examples that demonstrate the full capabilities of QuaMC 2D for alternative device technologies.

Modeling Coulomb Effects in Nanoscale Devices

26 Apr 2008 | Online Presentations | Contributor(s): Dragica Vasileska, Shaikh S. Ahmed, David K. Ferry

We describe the development of the modeling efforts focused towards proper description of the threshold voltage fluctuations due to the discrete impurity effects (different number and different distribution of the impurities from device to device on the same chip).NSF, ONRW. J. Gross, D. Vasileska …

Ensemble Monte Carlo Method Described

27 Apr 2008 | Online Presentations | Contributor(s): Dragica Vasileska, Gerhard Klimeck, Mark Lundstrom, David K. Ferry

In this presentation we give an overview of the implementation details of the Ensemble Monte Carlo method for mobility and drift velocity calculation in arbitrary materials and arbitrary crystalographic orientations.NSF-Career, ONR

Particle-Based Device Simulators Description

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.

What is CMOS Technology Facing?

07 Jul 2006 | Online Presentations | Contributor(s): Dragica Vasileska

Introduction of Quantum-Mechanical Effects in Device Simulation

MOS Capacitors: Description and Semiclassical Simulation With PADRE

26 Jun 2006 | Online Presentations | Contributor(s): Dragica Vasileska

Introduction of Quantum-Mechanical Effects in Device Simulation

Introduction to Silvaco Simulation Software

02 Jun 2006 | Online Presentations | Contributor(s): Dragica Vasileska

Silvaco/PADRE Description and Application to Device Simulation

Introduction to DD Modeling with PADRE

02 Jun 2006 | Online Presentations | Contributor(s): Dragica Vasileska

Silvaco/PADRE Description and Application to Device Simulation

Drift-Diffusion Model, Mobility Modeling

02 Jun 2006 | Online Presentations | Contributor(s): Dragica Vasileska

Drift-Diffusion Model

Drift-Diffusion Model, Part C: Sharfetter-Gummel, Time-Dependent Simulations

02 Jun 2006 | Online Presentations | Contributor(s): Dragica Vasileska

Drift-Diffusion Model