Abstract
Tunable electronic properties and large transition dipole moments of colloidal core/shell quantum dots are highly attractive for applications in quantum optics [1]. We investigate temperature-dependent optical emission properties of single CdSe/CdS colloidal quantum dots (QDs) embedded in a PMMA nanoshell. The two lowest exciton fine-structure levels (“A” and “F”) in these nanoparticles exhibit bright and stable emission below 70 K (Fig. 1(a)). In addition to the zero-phonon peak, five narrow sidebands are observed in the photoluminescence (PL). These features are attributed to discrete acoustic phonon modes of the nanoparticle. The eigen-frequencies νl,n of an elastic vibrating sphere are calculated using Lamb’s theory [2], where the quantum numbers l = 0,1,2.. and n = 1,2,3.. describe the angular and the radial parts of the vibrational modes.
© 2015 IEEE
PDF ArticleMore Like This
Florian Werschler, Christopher Hinz, Tjaard de Roo, Stefan Mecking, Alfred Leitenstorfer, and Denis V. Seletskiy
FW1N.5 CLEO: QELS_Fundamental Science (CLEO:FS) 2016
Florian Werschler, Benjamin Lindner, Christopher Hinz, Tjaard de Roo, Stefan Mecking, Denis V. Seletskiy, and Alfred Leitenstorfer
FW4H.4 CLEO: QELS_Fundamental Science (CLEO:FS) 2017
Florian Werschler, Benjamin Lindner, Christopher Hinz, Tjaard de Roo, Stefan Mecking, Denis V. Seletskiy, and Alfred Leitenstorfer
EG_5_4 European Quantum Electronics Conference (EQEC) 2017