4. nextnano.NEGF

The nextnano.NEGF tool is designed for accurate quantum simulations of semiconducting devices using the Non-Equilibrium Green Functions (NEGF) formalism. It has been originally developed to simulate electron dynamics and gain in quantum cascade lasers (QCLs) and superlattices. It can also be apply to infrared detectors such as quantum well infrared detectors (QWIPs) and quantum cascade detectors (QCDs), as well as transport in resonant tunneling diodes (RTDs). It is progressively extended to further applications such as interband devices.

Note

Check out publications by customers to discover quantitative insights to electron dynamics that the software has provided.

Note

Migration from the old website https://nextnano-docu.northeurope.cloudapp.azure.com/dokuwiki/doku.php?id=qcl:input_file to this documentation is ongoing. Full (but not up-to-date) information can be found in the old website.

• 4.1. Overview
• 4.2. Models
  • Self-consistent iteration
  • Electronic band structure
  • Green’s functions
  • Scattering mechanisms
  • Optical gain/absorption spectrum
  • Photon-assisted transport
  • Wall plug efficiency
• 4.3. Material Database
• 4.4. Tutorials
  • THz QCLs
  • Mid-IR QCLs
  • AlGaAs/GaAs RTD
  • — DEV — Gain enhancement in interband cascade lasers by carrier-rebalancing under quasi-equilibrium conditions
• 4.5. Keywords
  • Temperature
  • Bias{ }
  • SweepParameters{ }
  • Equilibrium{ }
  • Crystal{ }
  • Contacts{ }
  • Hybrid{ }
  • Materials{ }
  • OverwriteMaterialdatabase{ }
  • Structure{ }
  • Scattering{ }
  • Poisson
  • LateralDiscretization{ }
  • SimulationParameter{ }
  • Output{ }
  • Gain{ }
  • SurfaceRoughness{ }
  • EMfield{ }
• 4.6. Input Syntax
• 4.7. Command Line
• 4.8. Release Notes
  • Upcoming changes
  • 2024-09-16
  • 2024-07-25
  • 2024-06-21
  • 2024-05-23
  • 2024-03-14
  • 2023-12-01
  • 2023-05-25
  • 2023-02-22
• 4.9. FAQs
  • Features and Functionalities
  • Error Messages
  • Problems and Limitations
• 4.10. Release Notes (Classic)
  • 2024-01-17
  • 2022-06-13
  • 2022-04-29
  • 2022-03-14
• 4.11. FAQs (Classic)
  • Features and Functionalities
  • Error Messages
  • Problems and Limitations