We show that Coherent Population Oscillations effect allows to burn a narrow spectral hole (26Hz) within the homogeneous absorption line of the optical transition of an Erbium ion-doped crystal. The large dispersion of the index of refraction associated with this hole permits to achieve a group velocity as low as 2.7m/s with a ransmission of 40%. We especially benefit from the inhomogeneous absorption broadening of the ions to tune both the transmission coefficient, from 40% to 90%, and the light group velocity from 2.7m/s to 100m/s.
Manipulative resonant nonlinear optics: nonlinear interference effects and quantum control of nonlinearity, dispersion, transparency and inversionless amplification in an extended strongly-absorbing inhomogeneously-broadened medium
Enhancement of femtosecond photon echo signals from an inhomogeneously broadened InAs quantum dot ensemble using chirped pulses
Keio University（庆应义塾大学）；Center for Spintronics Research Network, Keio University（庆应义塾大学自旋电子学研究网络中心）；National Institute of Information and Communications Technology（信息通信研究机构）
Ho3+-doped CALGO crystals for high-power ultrafast 2.1-μm lasers
Ruhr-Universität Bochum（鲁尔大学）；Centre de Recherche sur les Ions, les Matériaux et la Photonique (CIMAP), UMR 6252 CEA-CNRS- ENSICAEN, Université de Caen Normandie（离子、材料与光子研究中心（CIMAP），UMR 6252 CEA-CNRS-ENSICAEN，诺曼底卡昂大学）；Research Center Chemical Science and Sustainability, University Alliance Ruhr（化学科学与可持续性研究中心，鲁尔大学联盟）
