All-optical single-electron read-out devices based on GaN quantum dots

We study few-particle interactions in GaN-coupled quantum dots and discuss how the built-in field characteristic of these structures strongly reinforce dipole-dipole and dipole-monopole interactions. We introduce a semi-analytical model that allows for a rapid and easy estimate of the magnitude of few-particle interactions and whose predictions are closer than 10% to "exact" results. We apply our study to the design of an all-optical read-out device that exploits long-range dipole-monopole interactions and may be also used to monitor the charge status of a quantum dot system. (C) 2002 American Institute of Physics. [DOI: 10.1063/1.1532546].