title: Plasma-assisted coherent backscattering for standoff spectroscopy.
abstract: We show that an intense coherent backward signal can be generated through a Raman-type four-wave-mixing process using forward propagating fields only. Phase matching for this process is achieved through a plasma modulation of the refractive index. Applications to standoff spectroscopy are discussed.
authors.affiliation: Texas A&M University, College Station, Texas 77843-4242, USA. yuanluqi@physics.tamu.edu
authors.forename: Luqi
authors.initials: L
authors.lastname: Yuan
authors.forename: Konstantin E
authors.initials: KE
authors.lastname: Dorfman
authors.forename: Aleksei M
authors.initials: AM
authors.lastname: Zheltikov
authors.forename: Marlan O
authors.initials: MO
authors.lastname: Scully