title: Four-wave mixing, quantum control, and compensating losses in doped negative-index photonic metamaterials.
abstract: The possibility of compensating absorption in negative-index metamaterials (NIMs) doped by resonant nonlinear-optical centers is shown. The role of quantum interference and the extraordinary properties of four-wave parametric amplification of counterpropagating electromagnetic waves in NIMs are discussed.
authors.affiliation: Department of Physics and Astronomy, University of Wisconsin-Stevens Point, Stevens Point, Wisconsin 54481, USA. apopov@uwsp.edu
authors.forename: Alexander K
authors.initials: AK
authors.lastname: Popov
authors.forename: Sergey A
authors.initials: SA
authors.lastname: Myslivets
authors.forename: Thomas F
authors.initials: TF
authors.lastname: George
authors.forename: Vladimir M
authors.initials: VM
authors.lastname: Shalaev