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We report measurements of optical transitions in single III/V InGaN quantum dots as a function of time. Temporal fluctuations in microphotoluminescence peak position and linewidth are demonstrated and attributed to spectral diffusion processes. The origin of this temporal variation is ascribed to randomly generated local electric fields inducing a Stark shift in the optical emission peaks of the InGaN quantum dots.© 2004 American Institute of Physics. DOI: 10.1063/1.1753653

Quantum dots QDs have attracted significant interest because of their potential use in classical and quantum optoelectronics applications and because of their interesting fundamental physics. To fully exploit potential applications in classical and quantum optoelectronics and nanotechnology, individual QDs must be studied and controlled. Single QDs can be probed using local spectroscopic techniques such as microphotoluminescence PL …