SIMON
A Single Electron Device and Circuit Simulator

SIMON is a sophisticated multipurpose simulator for single-electron devices and circuits. It features a graphical circuit editor embedded in a graphical user interface as well as the simulation of co-tunnel events and a single step interactive analyses mode. It supports energy dependent density of states and is able to calculate stability plots.

Versions and Prices Screen Shots For any questions please contact
Christoph Wasshuber at
by email.

Ordering SIMON Examples

Features of SIMON 2.0 Customer List

License Terms FAQ

Suggested reading: If you want to learn about the details of SIMON and much more about single-electronics in general, circuits, theory, simulation techniques, ..., then I suggest to read my book which appeared in the prestigious Springer series 'Computational Microelectronics' edited by Prof. Siegfried Selberherr:

Computational Single-Electronics
Christoph Wasshuber
Springer Verlag; ISBN: 321183558X; (July 2001)

Contents

Introduction
1. Single-Electronics Made Easy
2. A Historical Look Back
Theory
1. Orthodox Single-Electron Theory
2. Time and Space Correlations
3. Master Equation of Electron Transport
4. Extensions to the Orthodox Theory
Simulation Methods and Numerical Algorithms
1. Monte Carlo Method
2. Solution of the Master Equation
3. Coupling with SPICE
4. Free Energy
5. Tunnel Transmission Coefficient
6. Energy Levels
7. Evaluation Schemes for Cotunneling
8. Rate Calculation Including Electromagnetic Environment
9. Numerical Integration of Tunnel Rates
10. Time Dependent Node Voltages and Node Charges
11. Stability Diagram and Stable States
12. Capacitance Calculations
Circuits and Applications
1. Fundamental Circuits
2. Metrology Applications
3. Memory
4. Logic
5. Interfacing to CMOS
6. Exotic Circuits
7. Evolutionary Circuit Design
Random Background Charges
1. The Good Side of High Charge Sensitivity
2. Solutions on the Material Level
3. Solutions on the Device Level
4. Solutions on the Circuit and System Level
Manufacturing Methods and Material Systems
1. Shadow Evaporation
2. Step-Edge Cutoff
3. Nanoimprint
4. Planar Quantum Dots
5. Scanning Probe Microscopy
6. Granular Films
7. Self-Assembled Structures
8. Outlook
Appendixes
1. Fermi's Golden Rule
2. Capacitance and Resistance Extraction from Measured Data
3. Analytic Solutions of the Cotunneling Rate
4. Algorithms from Number Theory
5. Convex Hull of Point Set
6. Analytic Capacitance Calculation
References
Subject Index

Versions and Prices:

Version Price Operating System and Hardware

SIMON 2.0 - EDUCATIONAL Linux/PC OR Windows (95, 98, 2000, NT)
>> order Linux or Windows version

SIMON 2.0 - COMMERCIAL Linux/PC OR Windows (95, 98, 2000, NT)
>> order Linux or Windows version

SIMON 1.1 free of charge Unix
In this version several features are missing and limited support is available. Nevertheless, it is one way to check out some of the features of SIMON. If you want to obtain SIMON 1.1, please go to Institute of Microelectronics and fill out the license agreement form. After your completely filled out license agreement is received, the password to retrieve SIMON 1.1 via ftp is sent to you by regular mail.

Ordering SIMON:

Please use the secure order links in the Versions and Prices section to place your order. You can pay by check, credit card or PayPal.

If you need any special arrangements, such as payment by wire transfer, purchase orders, references or other documentation, please contact me by email or fax (see top of this page).

Please note that all billing will be handled through LYBRARY.COM. This means your credit card deduction will bear the name Lybrary.com.

Features of SIMON 2.0:

STABILITY PLOT
- traditional stability plot with two voltages as x- and y-axis
- one axis can be the temperature
- one or both axis can be a capacitance or resistance
- differentiation in x or y direction possible
NORMAL RESISTORS
- normal resistors allow the modeling of more complex and realistic circuits
CURRENT SOURCES
- current sources can be specified with a certain charge-granularity, which allows the modeling of electron injectors/pumps/turnstiles in a very easy manner
ENERGY DEPENDENT DENSITY OF STATES
- The tunnel model has been improved by incorporating three kinds of density of states functions
  - constant with optional bandgap (metallic)
  - square-root with bandgap (semiconductor-like)
  - x/(x²-1)^1/2 with bandgap (superconductor-like)
- discrete energy levels are modeled as gaussian functions, with mean, width, and height.
SUPPORT FOR SUPERCONDUCTING TUNNEL JUNCTIONS
- quasiparticle tunneling
FULL SUPPORT FOR LINUX
- SIMON is shipped in a software package where all necessary libraries (tcl/tk) are wrapped into the application. Hence no need to install any 3rd party tools to run SIMON on Linux. The installation is as easy as copying a file into a subdirectory.
EASY TO USE
- simple automatic installation for Windows operating systems
- graphical user interface
- graphical circuit editor (drag and drop assembly of circuits; few mouse clicks and your circuit is assembled)
- graphical visualization of simulation results (you can plot many graphs in one diagram; compare results from different simulations)
CO-TUNNELING
- co-tunneling is simulated up to a user specified order
- two different co-tunnel simulation algorithms are available
INTERACTIVE SINGLE-STEP MODE
- single electrons can be forced to tunnel through particular tunnel junctions in an interactive fashion
- the system energy, all node voltages, and all node charges are updated automatically

License Terms:

LICENSOR and AUTHOR:

DI. Dr. Christoph Wasshuber
PO Box 425281
Cambridge, MA 02142
USA

LICENSOR grants to the purchaser of the license (hereinafter called LICENSEE) of the SIMON-Software-Package (hereinafter called SIMON) a non-exclusive license to use SIMON on one computer and upon the terms and conditions hereinafter set out.

1. LICENSEE acknowledges that the code of SIMON which has been originally developed by Dipl.-Ing. Dr. Christoph Wasshuber is supplied "as is", without any accompanying maintenance services from the LICENSOR and AUTHOR.

EDUCATIONAL and CAMPUS License:
2. This is an EDUCATIONAL LICENSE and therefore SIMON shall be used only for educational or research purposes. The use for commercial purposes is strictly prohibited.

COMMERCIAL and DEVELOPER License:
2. This is a COMMERCIAL LICENSE and therefore SIMON can be used for commercial purposes.

3. LICENSEE agrees that any output of SIMON and any results obtained with SIMON will bear the subscript:

"SIMON - Simulation of Nano Structures - Christoph Wasshuber"

4. LICENSEE agrees to reference in any publication which directly or indirectly uses results obtained by SIMON the following work:

"Computational Single-Electronics", Christoph Wasshuber, 2001, Springer-Verlag,
ISBN 3-211-83558-X.

5. LICENSEE agrees to notify the LICENSOR by email, or regular mail, of every publication, where output or results obtained with SIMON have been used, and to send a copy or reprint of the same publication to the LICENSOR (address see above).

Versions and Prices	Screen Shots	For any questions please contact Christoph Wasshuber at by email.
Ordering SIMON	Examples
Features of SIMON 2.0	Customer List
License Terms	FAQ

Version	Price	Operating System and Hardware
SIMON 2.0 - EDUCATIONAL		Linux/PC OR Windows (95, 98, 2000, NT) >> order Linux or Windows version
SIMON 2.0 - COMMERCIAL		Linux/PC OR Windows (95, 98, 2000, NT) >> order Linux or Windows version
SIMON 1.1	free of charge	Unix In this version several features are missing and limited support is available. Nevertheless, it is one way to check out some of the features of SIMON. If you want to obtain SIMON 1.1, please go to Institute of Microelectronics and fill out the license agreement form. After your completely filled out license agreement is received, the password to retrieve SIMON 1.1 via ftp is sent to you by regular mail.