title: Reflectionless tunneling of light in gradient optics.
abstract: We analyze the optical (or microwave) tunneling properties of electromagnetic waves passing through thin films presenting a specific index profile that provides a cutoff frequency when the films are used below this frequency. We show that, contrary to the usual case of a square index profile, where tunneling is accompanied by a strong attenuation of the wave due to reflection, such films present the possibility of reflectionless tunneling, where the incoming intensity is totally transmitted.
authors.affiliation: Central Design Bureau for Unique Instrumentation of the Russian Academy of Science, Butlerov Strasse 15, 117342 Moscow, Russia.
authors.forename: Alexander B
authors.initials: AB
authors.lastname: Shvartsburg
authors.forename: Guillaume
authors.initials: G
authors.lastname: Petite