Publications associated with Quantum Optoelectronics

Observation of a Biexciton Wigner Molecule by Fractional Optical Aharonov-Bohm Oscillations in a Single Quantum Ring.

Nano letters 16 (2016) 27-33

HD Kim, R Okuyama, K Kyhm, M Eto, RA Taylor, AL Nicolet, M Potemski, G Nogues, LS Dang, K-C Je, J Kim, J-H Kyhm, KH Yoen, EH Lee, JY Kim, IK Han, W Choi, J Song

The Aharonov-Bohm effect in ring structures in the presence of electronic correlation and disorder is an open issue. We report novel oscillations of a strongly correlated exciton pair, similar to a Wigner molecule, in a single nanoquantum ring, where the emission energy changes abruptly at the transition magnetic field with a fractional oscillation period compared to that of the exciton, a so-called fractional optical Aharonov-Bohm oscillation. We have also observed modulated optical Aharonov-Bohm oscillations of an electron-hole pair and an anticrossing of the photoluminescence spectrum at the transition magnetic field, which are associated with disorder effects such as localization, built-in electric field, and impurities.

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