title: Microwave-controlled efficient Raman sub-harmonic generation.
abstract: We propose a novel scheme for efficient Raman sub-harmonic generation in a system of inhomogeneously broadened atomic vapor with atoms in a closed three-level Λ-configuration. The key feature underlying Raman sub-harmonics generation is microwave-induced hyperfine coherence between the two lower level metastable states. We show explicitly how the amplitude and phase of the microwave field generate controllable spectral amplitudes of Raman sub-harmonics. Our scheme is viable in currently available atomic vapor cells thereby opening the way for efficient sub-harmonic generation in standard experimental setups.
authors.forename: K V
authors.initials: KV
authors.lastname: Rajitha
authors.forename: Tarak N
authors.initials: TN
authors.lastname: Dey
authors.forename: Sumanta
authors.initials: S
authors.lastname: Das
authors.forename: Pankaj K
authors.initials: PK
authors.lastname: Jha