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Lecture M.J.A. de Dood


04 October 2011 FWN-Building 5118.-102, Nijenborgh 4, 9747 AG, Groningen
Speaker: Dr. M.J.A. de Dood
Affiliation: Huygens Lab., Universiteit Leiden
Title: Quantum optics in periodic structures
Date: Tue Oct 4, 2011
Start: 11.00
Location: FWN-Building 5118.-152
Host: C.H. van der Wal
Telephone: +31 50 363 4974


The process of spontaneous parametric down-conversion in a non-linear crystal is often used to create pairs of (quantum) correlated photons. The entanglement between the photon pairs is an important resource in quantum information and quantum computation. To go beyond two entangled photons requires either logic gates or sources that produce quantum states with more than two photons. In this talk I will present two different routes towards producing quantum states with larger photon numbers. The first approach uses large two-dimensional GaAs photonic crystals with large optical non-linearity. We also started working on another approach using highly efficient periodically poled crystals for parametric down-conversion to create high-dimensional spatial entanglement between photons. When pumped at a high power the regime with more than one photon pair per pump pulse is here feasible. With this approach we study the process of stimulated emission of photon pairs to create entangled 4-photon states.

Last modified:22 October 2012 2.31 p.m.