Reversible electron pumping and negative differential resistance in two-step barrier diode under strong terahertz ac field
A computational study, employing a Floquet-transfer-matrix approach, of the current in a model two-step barrier diode under intense ac fields in the terahertz range is reported. It is demonstrated that the field pumps a net tunnel current through the structure, which can exhibit a negative differential resistance and whose direction can be controlled by the ac-bias amplitude. These behaviors are seen to originate from the inelastic scattering of incoming electrons by absorption or emission of field quanta from a shape resonance present in the field-free structure.
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| Main Authors: | , , |
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| Format: | Artículo científico biblioteca |
| Language: | eng |
| Published: |
2011-03
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| Subjects: | Teoría molecular, Conductores eléctricos, Teoría de la información, Análisis de sistemas, Modelos matemáticos, Electrones, > Partículas, |
| Online Access: | https://repositorio.minciencias.gov.co/handle/20.500.14143/21670 |
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