Accession Number:

ADA429254

Title:

Development of GaN/AIN Self Assembled Quantum Dots for Room Temperature Operation of Quantum Dot Devices

Descriptive Note:

Final rept. 2000-2003

Corporate Author:

CALIFORNIA UNIV SANTA BARBARA DEPT OF MATERIALS

Personal Author(s):

Report Date:

2003-01-01

Pagination or Media Count:

30.0

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 InAsGaAs 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 AlNGaN 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

Subject Categories:

  • Crystallography
  • Optics
  • Quantum Theory and Relativity

Distribution Statement:

APPROVED FOR PUBLIC RELEASE