Apparent causality paradox in frustrated Gires–Tournois interferometers

Abstract

Negative group delay times upon total reflection from frustrated Gires–Tournois interferometers seem to violate causality. Contrary to what has been recently argued in the literature, I show with the example of total light reflection upon an ideal nonabsorbing plasma that adding the time associated with the Goos–Hänchen shift does not solve the paradox, which remains open.

© 2005 Optical Society of America

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