Ballistic nanodevices for terahertz data processing: Monte Carlo simulations
| Autor: | Y. Roelens, Alain Cappy, Daniel Pardo, Beatriz G. Vasallo, Tomas Gonzalez, J.S. Galloo, Javier Mateos, Sylvain Bollaert |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Materials science
Condensed matter physics business.industry Terahertz radiation Mechanical Engineering Monte Carlo method Bioengineering General Chemistry Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Multiplexer Space charge Mechanics of Materials Ballistic conduction Optoelectronics General Materials Science Electric potential Electrical and Electronic Engineering business Diode |
| Zdroj: | Nanotechnology. 14:117-122 |
| ISSN: | 0957-4484 |
| DOI: | 10.1088/0957-4484/14/2/303 |
| Popis: | By using a semi-classical two-dimensional Monte Carlo simulation, simple devices (T-branch junctions (TBJs) and rectifying diodes) based on AlInAs/InGaAs ballistic channels are analysed. Initially, the model is validated by means of Hall-effect measurements of mobility and electron concentration in long (diffusive) channels. Then, quasi-ballistic transport at room temperature is confirmed in a 100 nm channel. Our simulations qualitatively reproduce the experimental results of electric potential measured in a TBJ appearing as a result of electron ballistic transport, and in close relation with the presence of space charge inside the structure. As examples of devices exploiting the ballistic transport of electrons, preliminary simulations of a multiplexor/demultiplexor and a rectifying diode are presented, demonstrating their capability for terahertz operation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|