title: Large phase-by-phase modulations in atomic interfaces.
abstract: Phase-resonant closed-loop optical transitions can be engineered to achieve broadly tunable light phase shifts. Such a novel phase-by-phase control mechanism does not require a cavity and is illustrated here for an atomic interface where a classical light pulse undergoes radian level phase modulations all-optically controllable over a few micron scale. It works even at low intensities and hence may be relevant to new applications of all-optical weak-light signal processing.
authors.affiliation: European Laboratory for Nonlinear Spectroscopy (LENS), I-50019 Sesto Fiorentino, Firenze, Italy.|Istituto Nazionale di Ottica (INO-CNR), I-50125 Firenze, Italy.|Department of Engineering and Information Technology, Brescia University, I-25133 Brescia, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Artoni
authors.affiliation: Istituto Nazionale di Ottica (INO-CNR), I-50125 Firenze, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Zavatta