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Entangled Photon Pair Emission and Interference from Single Quantum Dots

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNChapter (peer-reviewed)

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Publication date2008
Host publicationSemiconductor Quantum Bits
EditorsFritz Henneberger , Oliver Benson
PublisherJenny Stanford
Pages369-388
Number of pages20
ISBN (electronic)9789814241199
ISBN (print)9789814241052
<mark>Original language</mark>English

Abstract

We review in this chapter our recent realization and development of en- tangled light emission from individual InAs quantum dots. We describe how energetic which-path information is circumvented by attention to the confinement energy of the dot, resulting in generation of entangled photon pairs with up to 76% fidelity. Improvements in device design are detailed that reveal the importance of controlling the charge of the dot in order to maximize both emission intensity and fidelity. Finally we present interferometric measurements of the entangled biphoton state that shows a two-fold enhancement of the de Broglie wavelength com- pared to single photons.