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