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Abstract:
This research was focused on four topics that are aimed at a better understanding of the physics and structural properties of quantum dots. The authors have demonstrated that the positioning and ordering of self-assembled InAs/GaAs quantum dots (QDs) are possible using a localized strain engineering of the growth surface. Using micro-photoluminescence (Micro-PL) they have demonstrated a novel way of generating charged exciton states in QDs. A detailed understanding of the recombination processes involved with the various charged states excitons states was obtained. Using QDs in microdisk, they have demonstrated single heralded photon emission from a self-assembled QD. By temperature tuning, they are able to shift the 1X exciton QD exciton into resonance with a whispering gallery mode of a microdisk and achieve turnstile of the coupled cavity-quantum dot system. The authors have shown that a QD is not only a source of correlated monochromatic photons, but it also is a source of multicolor photons with excitation-power-dependent correlation properties. This research on GaN QDs was aimed at developing the optimal growth conditions in the AlN/GaN system using molecular beam epitaxy (MBE). Optical spectroscopy of quantum dot ensembles was carried out and structures were developed to probe single GaN QDs using micro-photoluminescence. A list of 58 publications dated July 2000 to June 2003, 3 works in press, 12 oral presentations, 15 conference papers dated 2000-2003, and 4 patents is included as well as a cumulative list of 61 publications from July 2000 on. (5 figures)
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Description: |
Final rept. 2000-2003 |
| Pages: |
30 |
| Report Date: |
2003 |
| Contract Number: |
DAAD19-99-1-0372 |
| Report Number: |
A452924 |
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Keywords relating to this report:
