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Publication Citation: Single-Photon Propagation Time through Dielectric Bandgaps: Large Variation Due to Small Structural Changes

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Author(s): Natalia B. Rutter; Sergey V. Polyakov; Paul D. Lett; Alan L. Migdall;
Title: Single-Photon Propagation Time through Dielectric Bandgaps: Large Variation Due to Small Structural Changes
Published: February 01, 2010
Abstract: The transit times of photons traveling through opaque barriers such as dielectric stacks exhibit the Hartman saturation effect. This saturation of the transit time is quite sensitive to the addition of a single dielectric layers, even onto an already thick stack. These traversal times can vary significantly from sub-luminal to apparently super-luminal and vice versa with the addition of just a single layer to a 30 layer stack. We measure the photon traversal time through dielectric layer stacks with alternating refractive indices using a Hong-Ou-Mandel interferometer and observe transit time changes, both positive and negative, five times larger than the transit time through such a layer in isolation.
Citation: Optics Express
Volume: 18
Pages: pp. 2279 - 2286
Keywords: Hartman effect; Hong-Ou-Mandel; parametric downconversion; single photon; time delay
Research Areas: Optics, Quantum Optics, Single Photon Detectors, Entangled Photons, Quantum Devices, Single Photon Sources, Quantum Information Technology
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