title: Quantum simulation of multiple-exciton generation in a nanocrystal by a single photon.
abstract: We have shown theoretically that efficient multiple-exciton generation (MEG) by a single photon can be observed in small nanocrystals. Our quantum simulations that include hundreds of thousands of exciton and multiexciton states demonstrate that the complex time-dependent dynamics of these states in a closed electronic system yields a saturated MEG effect on a picosecond time scale. Including phonon relaxation confirms that efficient MEG requires the exciton-biexciton coupling time to be faster than exciton relaxation time.
authors.affiliation: Naval Research Laboratory, Washington D.C. 20375, USA.
authors.forename: Wayne M
authors.initials: WM
authors.lastname: Witzel
authors.forename: Andrew
authors.initials: A
authors.lastname: Shabaev
authors.forename: C Stephen
authors.initials: CS
authors.lastname: Hellberg
authors.forename: Verne L
authors.initials: VL
authors.lastname: Jacobs
authors.forename: Alexander L
authors.initials: AL
authors.lastname: Efros