title: 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.
authors.affiliation: Fastlite, Campus de l'Ecole Polytechnique, 91128 Palaiseau, France. tournois@fastlite.com
authors.forename: P
authors.initials: P
authors.lastname: Tournois