title: Efficient hyper-Raman scattering in resonant coherent media.
abstract: We propose and analyze a hyper-Raman scheme for generation of coherent light in a five-level atomic system based on electromagnetically induced transparency (EIT). We show that EIT suppresses linear and nonlinear photon absorption and enables the hyper-Raman process to proceed through real, near-resonant intermediate states. The scheme greatly enhances hyper-Raman efficiency and may be used for generating short-wavelength radiation at low pump intensities.
authors.affiliation: National Key Laboratory for Laser Technique and Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China. yingwu2@eyou.com
authors.forename: Ying
authors.initials: Y
authors.lastname: Wu
authors.forename: Lingling
authors.initials: L
authors.lastname: Wen
authors.forename: Yifu
authors.initials: Y
authors.lastname: Zhu