Modelling of electronic transport in Quantum Well Infrared Photodetectors
| Autor: | Virginie Trinité, Vincent Guériaux, Julien Nagle, Eric Costard, Alexandru Nedelcu, Ezzeddine Ouerghemmi, Mathieu Carras |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Physics
Electron capture business.industry Detector Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Computational physics Gallium arsenide chemistry.chemical_compound Optics Orders of magnitude (time) chemistry Electric field Range (statistics) Quantum well infrared photodetector business Transport phenomena |
| Zdroj: | Infrared Physics & Technology. 54:204-208 |
| ISSN: | 1350-4495 |
| Popis: | Our interest is to model the electronic transport in Quantum Well Infrared Photodetectors (QWIPs). Standard modelling was based on self-consistent calculation of the non-uniform electric field with empirical description of the electron capture (Thibaudeau et al., 1996 [17] ). Realistic empirical parameters had to be extracted from experiment, consequently purely numerical studies were not possible. Moreover, this approach allowed only a qualitative description of transport phenomena. In order to get rid of adjustable parameters, we have changed for a modelling based on the microscopic description of the transport (Jovanovic et al., 2004 [11] ). We have applied this modelling to the design of a variety of QWIPs. For example, excellent agreement with experimental dark current–voltage curves for different sizes of the barriers is demonstrated on a 8 μm detector over more than 6 orders of magnitude. The behaviour with respect to temperature on a wide range (30–200 K) is also well reproduced on this device as well as on a 17 μm detector. Those promising results confirm that this approach can give not only a good quantitative agreement but can also be a useful predictive tool. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect