Photogalvanic effect in asymmetric quantum wells and superlattices
| Autor: | K. Schwarz, C. Schönbein, G. Tränkle, J. Fleissner, Harald Schneider, G. Bihlmann, S. Ehret, G. Böhm |
|---|---|
| Přispěvatelé: | Publica |
| Rok vydání: | 1998 |
| Předmět: |
Physics
Photocurrent Übergitter Infrarotdetektor photogalvanic effect Condensed matter physics Oscillation Intersubband-Übergang Superlattice media_common.quotation_subject Photoconductivity superlattice Condensed Matter Physics Asymmetry infrared detector quantum wells Electric field photogalvanischer Effekt General Materials Science intersubband transition Electrical and Electronic Engineering Quantum well Excitation media_common |
| Zdroj: | Superlattices and Microstructures. 23:1289-1295 |
| ISSN: | 0749-6036 |
| DOI: | 10.1006/spmi.1996.0225 |
| Popis: | We have investigated the influence of the final states of bound-to-continuum transitions within the conduction band of asymmetric quantum well structures on the photocurrent. This influence manifests itself by an energy-dependent oscillation of the current direction. We observe pronounced oscillations at zero bias voltage in a double quantum well structure, induced by an asymmetric excitation into continuum states with positive and negative momentum, i.e. by a photogalvanic effect (PGE). If this effect is superimposed on an asymmetric backrelaxation, similar oscillations are observed in the spectrum when the latter asymmetry is compensated by an external electric field. Theoretically, we find a strong relation between the PGE and a quantum interference effect occurring in the a strong re continuum. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect