An electrically driven cavity-enhanced source of indistinguishable photons with 61% overall efficiency

Electrically driven single-photon source.

Electroluminescence from a single quantum dot within the intrinsic region of a p-i-n junction is shown to act as an electrically driven single-photon source. At low injection currents, the dot electroluminescence spectrum reveals a single sharp line due to exciton recombination, while another line due to the biexciton emerges at higher currents. The second-order correlation function of the diod...

A Cavity QED Source for Entangled Photons

The efficient implementation of most quantum communication protocols needs a controlled source of entangled qubits. Presently, the most common choice is using polarization-entangled photons, since they are able to freely propagate maintaining the quantum coherence between the different polarization compo­ nents for long distances. Significant demonstrations of this fact are the recent achieveme...

Task-space Control of Electrically Driven Robots

Actuators of robot operate in the joint-space while the end-effect or of robot is controlled in the task-space. Therefore, designing a control system for a robotic system in the task-space requires the jacobian matrix information for transforming joint-space to task-space, which suffers from uncertainties. This paper deals with the robust task-space control of electrically driven robot manipula...

Indistinguishable near-infrared single photons from an individual organic molecule

Indistinguishable photons from a single molecule.

We report the results of coincidence counting experiments at the output, of a Michelson interferometer using the zero-phonon-line emission of a single molecule at 1.4 K. Under continuous wave excitation, we observe the absence of coincidence counts as an indication of two-photon interference. This corresponds to the observation of Hong-Ou-Mandel correlations and proves the suitability of the ze...