Abstract
Near-field spectroscopy of self-assembled InGaAs single quantum dots (QDs) is described. For the application of near-field optical microscope to various versions of advanced spectroscopy of single QDs, the functional performance of a near-field fiber probe is much improved. By optimizing the structure of the probe, high sensitivity in signal detection, as well as high spatial resolution, is successfully achieved. In combination with a standard pump-probe spectroscopic techniques, we realize nonlinear absorption spectroscopy of single QDs at low temperature. The absorption cross section of a single QD is effectively modified by local injection of a few electrons into the QD. Employing a femtosecond pulsed laser, time-resolved photoluminescence spectroscopy is also performed.
| Original language | English |
|---|---|
| Pages (from-to) | 114-123 |
| Number of pages | 10 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3791 |
| Publication status | Published - 1999 |
| Externally published | Yes |
| Event | Proceedings of the 1999 Near-Field Optics: Physics, Devices, and Information Processing - Denver, CO, USA Duration: 1999 Jul 22 → 1999 Jul 23 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering