Abstract
We describe two kinds of electrical pump and probe measurements to investigate energy relaxation time in a quantum dot in the Coulomb blockade regime. Transient current driven by single-step pulses can be used to determine the tunneling rates for the two tunneling barriers as well as the relaxation rate under a limited condition. A double-step pulse scheme is more useful for deducing longer relaxation times. The feasibility of these techniques is demonstrated by simple simulations based on rate equations that describe the time-dependent transport, and by experiments performed on a few-electron quantum dot.
| Original language | English |
|---|---|
| Pages (from-to) | 4804-4808 |
| Number of pages | 5 |
| Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
| Volume | 42 |
| Issue number | 7 B |
| DOIs | |
| Publication status | Published - 2003 Jul |
| Externally published | Yes |
Keywords
- Coulomb blockade
- Energy relaxation
- Pump and probe measurement
- Quantum dot
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)