Sub-molecular photoluminescence

Igor L Klyukach, R. I. Sokolovskiǐ

Alexey A. Toropov, Maxim V. Rakhlin, K. G. Belyaev +7 more

We report on emission properties of single-photon sources of visible light, based on InAs/AlGaAs, CdTe/ZnTe, and CdSe/ZnSe quantum dot (QD) heterostructures grown by molecular beam epitaxy. For all types of QDs, the studies performed by micro-photoluminescence and photon correlation spectroscopies demonstrated the single-photon nature of emission with typical values of the second-order correlation function g (2) (0) less than 0.2 and allowed evaluation of sub-microsecond kinetics of blinking governed by local charging effects.

Mariangela Gussoni, Chiara Castiglioni, M. Del Zoppo +1 more

Li Yuan, Dou Xiu-Ming, Chang Xiu-Ying +3 more

Single InAs quantum dot (QD) sample was grown by molecular-beam epitaxy (MBE). The Photoluminescences (PL) of the exciton and biexciton in a single QD were measured at 5 K. The PL intensity as a function of the laser excitation power, the fine structure splittings of the exciton and biexciton, and the corresponding linearly polarized emissions were analyzed. By means of Hanbury-Brown and Twiss (HBT) setup, the photon correlation between the PL of exciton and biexciton were measured, which is gave an evidence of the quantum cascade emissions between biexciton and exciton PL.

Charles Santori, Andrei Faraon, Zhihong Huang +5 more

Spectral diffusion is a critical problem affecting quantum devices based on nitrogen-vacancy centers in diamond. Here we report sub-GHz photoluminescence emission spectroscopy of near-surface nitrogen-vacancy centers in several types of samples.

Gustav Richter, M. Schleifstein