Rapid biexciton-state preparation in a quantum dot using on-off pulse sequences

pH Effect on the Size of Graphene Quantum dot Synthesized by Using Pulse Laser Irradiation

In this study graphene oxide (GO) was synthesized by using Hummer’s method. Low dimension graphene quantum dot nanoparticles (GQDs) were synthesized using pulse laser irradiation. Fourier Transform-Infrared Spectroscopy (FTIR), Ultraviolet-Visible (UV-Vis) spectroscopy and photoluminescence (PL) analysis were applied to study the GQDs characteristic. Scanning electron microscopy illustrated the...

Magnetoluminescence from trion and biexciton in type-II quantum dot

We theoretically investigate optical Aharonov-Bohm (AB) effects on trion and biexciton in the type-II semiconductor quantum dots, in which holes are localized near the center of the dot, and electrons are confined in a ring structure formed around the dot. Many-particle states are calculated numerically by the exact diagonalization method. Two electrons in trion and biexciton are strongly corre...

A study on photon-entanglement from the biexciton cascade in a quantum dot

Radiative cascade from quantum dot metastable spin-blockaded biexciton

Y. Kodriano,1 E. Poem,1 N. H. Lindner,2 C. Tradonsky,1 B. D. Gerardot,3 P. M. Petroff,4 J. E. Avron,1 and D. Gershoni1 1Department of Physics, The Technion-Israel Institute of Technology, Haifa 32000, Israel 2Institute of Quantum Information, Caltech, Pasadena, California 91125, USA 3School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom 4Materia...

Quantum-dot spin-state preparation with near-unity fidelity.

We have demonstrated laser cooling of a single electron spin trapped in a semiconductor quantum dot. Optical coupling of electronic spin states was achieved using resonant excitation of the charged quantum dot (trion) transitions along with the heavy-light hole mixing, which leads to weak yet finite rates for spin-flip Raman scattering. With this mechanism, the electron spin can be cooled from ...