We report on light slowing down in a rare-earth-metal-ion-doped crystal by persistent spectral hole burning. The absence of motion of the active ions, the large inhomogeneous broadening, the small homogeneous width, and the long lifetime of the hyperfine shelving states make this material convenient for the burning of narrow persistent spectral holes. Since the hole can be burnt long before the...

Spatial displacements of the probe and generated four-wave mixing beams are observed in a three-level V-type, as well as a two-level atomic system near resonance. The observed spatial shift curves reflect the typical enhanced cross-Kerr nonlinear dispersion properties in the electromagnetically induced transparency EIT systems. The spatial beam displacements are controlled by the strong control...

There has been an increasing interest in all-optical analogues of electromagnetically induced transparency and Autler-Townes splitting. Despite the differences in their underlying physics, both electromagnetically induced transparency and Autler-Townes splitting are quantified by a transparency window in the absorption or transmission spectrum, which often leads to a confusion about its origin....

F. E. Becerra, R. T. Willis, S. L. Rolston, and L. A. Orozco* Joint Quantum Institute, Department of Physics, University of Maryland and National Institute of Standards and Technology, College Park, Maryland 20742, USA Departamento de Física, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV), Apdo. Post. 14-740, 07000 México, Distrito Federal, México...

Optimization of Thin, Nitrogen-Rich Silicon Oxynitrides Grown by Rapid Thermal Nitridation A. Ludsteck, J. Schulze, I. Eisele, W. Dietl, H. Chung, Z. Nenyei,* A. Bergmaier, and G. Dollinger Institute of Physics, EIT, Universität der Bundeswehr München, 85577 Neubiberg, Germany Mattson Thermal Products GmbH, 89160 Dornstadt, Germany Department of Physics, Technische Universität München, 85747 Ga...

We show how to eliminate the error caused by an incorrectly modeled boundary in electrical impedance tomography (EIT). In practical measurements, one usually lacks the exact knowledge of the boundary. Because of this the numerical reconstruction from the measured EIT–data is done using a model domain that represents the best guess for the true domain. However, it has been noticed that the inacc...

Liang He, Yu-xi Liu, S. Yi, C. P. Sun, and Franco Nori Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080, China Frontier Research System, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan CREST, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan Center for Theoretical Physics, Physics Department, Cen...

Near the condition of electromagnetically induced transparency in a three-level system, the absorption experienced by the weak probe laser beam interacting with one transition is very sensitive to the frequency detuning of the strong-coupling laser beam coupled to another transition. When the frequency detuning of the coupling laser is modulated at different frequencies, the resulting change in...