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We report that photoluminescence (PL) intermittency properties of single CdSe semiconductor nanoparticles at room temperature are sensitive to local environments around nanoparticles. The PL intermittency behaviors depend on ambient gas (N 2 or air) and substrate material (glass or Au). Blueshift of the PL peak energy is observed on glass and Au surfaces during photodegradation in air. The...
Near-field photoluminescence spectroscopy of a GalnNAs quantum well with a spatial resolution of 50-150 nm (lambda/20- lambda/8) was performed to visualize the bandgap fluctuation, which reflects the nonuniform distribution of N and In atoms. We quantitatively estimate the real-space potential profile and fluctuation of N concentration in combination with numerically solving Schrodinger equation.
Near-field photoluminescence imaging spectroscopy of GaAs quantum dots is presented. We successfully mapped out center-of -mass wave function of an exciton in real-space due to the enhancement of spatial resolution up to 30 nm
Summary form only given. Excitons confined in nanocrystals or quantum dots attract much attention because they have a very long phase relaxation time that opens the way to the artificial coherent control of the excitons. CuCl quantum dot is a typical material in which the translational motion of the exciton is confined. In this paper, we report on the high resolution measurement of the resonant luminescence...
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