100% Reflection in Less Than No Time At All
A poster presented at DAMOP 2000 in Storrs Connecticut

J. S. Lundeen, K. J. Resch, L. Wawrezinieck and A. M. Steinberg
Department of Physics, University of Toronto

We present an experiment to measure the delay upon reflection from a frustrated Gires-Tournois interferometer.  It has been predicted [1] that the time delay for a reflected pulse in this geometry should be negative. In experiments on absorption or tunneling, pulse reshaping ensures that energy transport on average never violates causality.  However, in this experiment the reflection amplitude is 100%.  We explore this apparent paradox while clarifying the relationship between the phenomenon and the Goos-Hanchen shift.  We measure the negative group delay time with a Hong-Ou-Mandel Interferometer, which offers sub-femtosecond time resolution and some dispersion cancellation effects. Experimental results are presented as well as a theoretical explanation of the apparent paradox.  [1] P. Tournois, IEEE J. Quantum Elect. 33, 1, (1997).

Introduction and Hong-Ou-Mandel Interferometer

Negative Delay Time System - The Frustrated Gires-Tournois Interferometer

Experimental Setup and Measurement Techniques

How the Goos-Hanchen Shift Comes into the Problem


A PDF version of the entire poster

This page is maintained by Jeff Lundeen.
Last updated August 11, 2000

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