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Published February 2, 2009 | Published
Book Section - Chapter Open

Single photon nonlinear optics in photonic crystals

Abstract

We coherently probe a quantum dot that is strongly coupled to a photonic crystal nano-cavity by scattering of a resonant laser beam. The coupled system's response is highly nonlinear as the quantum dot saturates with nearly one photon per cavity lifetime. This system enables large amplitude and phase shifts of a signal beam via a control beam, both at single photon levels. We demonstrate photon-photon interactions with short pulses in a system that is promising for ultra-low power switches and two-qubit quantum gates.

Additional Information

© 2009 SPIE. Financial support was provided by the ONR Young Investigator Award and MURI Center for photonic quantum information systems (ARO/DTO Program). D.E. and I.F. were also supported by the NDSEG and NSF fellowships. Work was performed in part at the Stanford Nanofabrication Facility of NNIN supported by the National Science Foundation. We thank Nick Stoltz and Pierre Petroff of UC Santa Barbara for QD material.

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