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Type: Artigo de periódico
Title: Reversible electron pumping and negative differential resistance in two-step barrier diode under strong terahertz ac field
Author: Murillo, G
Schulz, PA
Arce, JC
Abstract: 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. (C) 2011 American Institute of Physics. [doi:10.1063/1.3562309]
Country: EUA
Editor: Amer Inst Physics
Citation: Applied Physics Letters. Amer Inst Physics, v. 98, n. 10, 2011.
Rights: aberto
Identifier DOI: 10.1063/1.3562309
Date Issue: 2011
Appears in Collections:Unicamp - Artigos e Outros Documentos

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