| Zugriffsnummer | 14715 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Role of acoustical reflections in quantized acousto-electric current devices |
| Autor(in); Institution |
Ebbecke, Jens; 2.41, Halbleiterstrukturen, PTB-Braunschweig
Ahlers, Franz Josef; 2.41, Halbleiterstrukturen, PTB-Braunschweig
|
| Quelle/Jahr | Conference digest : 2002 Conference on Precision Electromagnetic Measurements:(2002), 332 - 333 |
| ISBN | 0-7803-7242-5 |
| Verlag | Piscataway, NJ: IEEE |
| Konferenzangaben | Conference on Precision Electromagnetic Measurements ; CPEM 2002, Ottawa, 16-21, June, 2002, Canada |
| Zusammenfassung | In surface acoustic wave devices exhibiting quantised acoustoelectric current (QAC) transport the precision of quantisation, which is crucial in a potential application as a current standard, is influenced by reflections of the acoustic wave. We studied the role of these reflections in two extreme limits: an intentionally applied counterpropagating SAW beam simulates intense reflections whereas a nearly reflectionless situation is realised with a specially designed device. In contrast to previous findings we conclude that acoustic echoes are always detrimental and should be avoided completely. |
