Tutorials

Download our example input files

CEO T-shape wire

Tutorials

On this website, you can download a selection of our tutorial input files. If you need input files not listed here, please contact stefan.birner [at] nextnano.com.

Complete list of all tutorials


Triangular quantum well

Triangular well

Triangular well

What you can learn:
  • Energy levels and wave functions of a triangular quantum well
  • Schrödinger equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-09-22

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Quantum well (Interband transitions)

Quantum well

Optical interband transitions in a quantum well - Matrix elements and selection rules

What you can learn:
  • Energy levels and wave functions of an infinite and finite quantum well, interband transition matrix elements (spatial wave function overlap), selection rules
  • Schrödinger equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-07-20

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Schottky barrier

Schottky barrier

Schottky Barrier

What you can learn:
  • Metal-semiconductor interface: Fermi-level pinning; Ohmic contact vs. Schottky contact vs. Surface charge density vs. Surface doping
  • Poisson equation

Input files for: 1D, 2D / nextnano++, nextnano³ / Date: 2016-07-20

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pn junction

pn junction

Example 1: GaAs pn junction

What you can learn:
  • doping
  • Poisson equation

Input files for: 1D, 2D, 3D / nextnano++, nextnano³ / Date: 2016-07-20

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Example 2: GaAs pn junction under forward bias

What you can learn:
  • apply a bias, drift-diffusion calculation, recombination
  • Current-Poisson equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-07-20

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Cascade Solar Cell

Cascade solar cell

Cascade Solar Cell (Tandem Solar Cell)

What you can learn:
  • pn junction, heterostructure, doping
  • strain equation, Poisson equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-07-20

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AlGaAs/GaAs heterostructure

Schrödinger-Poisson

Schrödinger-Poisson - A comparison to the tutorial file of Greg Snider's code (AlGaAs/GaAs HEMT)

What you can learn:
  • heterostructure, doping, 2DEG, AlGaAs/GaAs, user-defined function for the doping profile
  • self-consistent Schrödinger-Poisson equation

Input files for: 1D, 2D / nextnano³ / Date: 2016-07-20

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HEMT

HEMT

InGaAs/AlInAs HEMT structure (High Electron Mobility Transistor)

What you can learn:
  • heterostructure, doping, 2DEG, InGaAs/AlInAs
  • strain equation, self-consistent Schrödinger-Poisson equation

Input files for: 1D, 2D, 3D / nextnano++, nextnano³ / Date: 2016-07-20

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Inverted HEMT

Inverted HEMT

AlGaAs/GaAs inverted HEMT structure (High Electron Mobility Transistor) - no online documentation available

What you can learn:
  • heterostructure, doping, 2DEG, AlGaAs/GaAs, variables in input file
  • self-consistent Schrödinger-Poisson equation

Input files for: 1D / nextnano³ / Date: 2016-07-20

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Si/SiGe MODQW

Si/SiGe modulation doped quantum well

Si/SiGe MODQW (Modulation Doped Quantum Well)

What you can learn:
  • heterostructure, doping, 2DEG, Si/SiGe, strain, Delta band edge
  • strain equation, self-consistent Schrödinger-Poisson equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-07-20

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AlGaInP on GaAs

AlGaInP

Band gap of strained AlGaInP on GaAs substrate

What you can learn:
  • alloys, linearly graded alloys, bowing, strain, band gaps
  • strain equation

Input files for: 1D / nextnano³ / Date: 2016-10-25

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Capacitance-Voltage (MIS)

Metal-insulator-semiconductor structure

Capacitance-Voltage curve of a “metal”-insulator-semiconductor (MIS) structure

What you can learn:
  • apply a bias
  • self-consistent Schrödinger-Poisson equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-07-20

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Wurtzite

wurtzite band edge

GaN/AlN wurtzite structure: Strain, piezo and pyroelectric charges in wurtzite

What you can learn:
  • wurtzite, strain, piezoelectricity, pyroelectricity
  • strain equation, Poisson equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-07-20

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AlGaN/GaN FET

Band structure of an AlGaN/GaN FET

Two-dimensional electron gas in an AlGaN/GaN field effect transistor (FET)

What you can learn:
  • wurtzite, strain, piezoelectricity, pyroelectricity, electron energy levels and wave functions, 2DEG, variables in input file
  • strain equation, self-consistent Schrödinger-Poisson equation

Input files for: 1D, 2D / nextnano++, nextnano³ / Date: 2016-07-20

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2DEG in a hexagonal core-shell nanowire

Core-shell nanowires

1. Schrödinger equation of a two-dimensional core-shell structure
2. Hexagonal 2DEG - Two-dimensional electron gas in a delta-doped hexagonal shaped GaAs/AlGaAs nanowire heterostructure

What you can learn:
  • 2D simulations, circular and hexagonal quantum confinement, core-shell nanowires, sweep over alloy concentrations and core radius, interband transitions (spatial overlap matrix elements)
  • Schrödinger equation in 2D, self-consistent Schrödinger-Poisson equation in 2D

Input files for: 2D / nextnano++, nextnano³ / Date: 2016-07-20

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Quantum dot molecule

Quantum dot molecule

Quantum dot molecule

What you can learn:
  • 3D simulation, quantum dot, applying an electric field, performing an electric field sweep
  • Schrödinger equation in 3D

Input files for: 3D / nextnano++, nextnano³ / Date: 2016-07-20

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Pyramidal shaped quantum dot

Quantum dot (pyramid)

Energy levels in a pyramidal shaped InAs/GaAs quantum dot including strain and piezoelectric fields

What you can learn:
  • 3D simulation, quantum dot, strain, piezoelectric fields
  • Strain equation, Poisson equation, Schrödinger equation in 3D

Input files for: 3D / nextnano++, nextnano³ / Date: 2016-07-20

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Spherical Si Quantum Dot (Artificial Atom)

Spherical Si Quantum Dot (Artificial Atom)

Hole energy levels of an "artificial atom" - Spherical Si Quantum Dot (6-band k.p)

What you can learn:
  • 3D simulation, quantum dot, spin-orbit splitting, artificial atom
  • 6-band k.p Schrödinger equation in 3D

Input files for: 3D / nextnano++, nextnano³ / Date: 2017-01-27

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InGaAs laser diode

Laser Diode (InGaAs)

InGaAs Laser Diode - no online documentation available

What you can learn:
  • drift-diffusion current based on quantum density, pn junction, quaternaries
  • self-consistent Schrödinger-Poisson-Current equation in 1D

Input files for: 1D / nextnano++ / Date: 2016-07-20

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Double Gate MOSFET

Double Gate MOSFET

Double Gate MOSFET (Metal Oxide Semiconductor Field Effect Transistor)

What you can learn:
  • 2D and 3D simulations, drift-diffusion, mobility models
  • self-consistent Current-Poisson equation in 2D and 3D

Input files for: 2D / nextnano++, nextnano³ / Date: 2016-07-20

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Strained substrate

Strained substrate

Growth of layers on strained (or stressed) substrates (biaxial and uniaxial)

What you can learn:
  • uniaxial and biaxial strain, stress
  • strain equation

Input files for: 1D / nextnano³ / Date: 2016-07-20

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Broken gap quantum well

InAs/GaSb superlattice

InAs / GaSb broken gap quantum well (BGQW) (type-II band alignment)

What you can learn:
  • 1D simulation, 8-band k·p, broken gap, type-II band alignment
  • 8-band k·p equation

Input files for: 1D / nextnano++, nextnano³ / Date: 2016-07-20

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Optical absorption

Optical absorption of a quantum well

Optical absorption of a quantum well - Diploma thesis documentation available

What you can learn:
  • 8-band k·p, optical absorption
  • 8-band k·p equation

Input files for: 1D / nextnano++ / Date: 2016-07-20

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Tight-binding (sp3s*)

Tight-binding band structure

Empirical tight-binding (sp3s*) band structure of GaAs, GaP, AlAs, InAs, C (diamond) and Si

What you can learn:
  • tight-binding band structure of bulk semiconductors

Input files for: nextnano³ / Date: 2016-10-31

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(for 2015-08-18 version of nextnano)

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(for updates of nextnano)