Now showing items 1-4 of 4

    • Large negative and positive delay of optical pulses in coherently prepared dense Rb vapor with buffer gas RID B-9041-2008 

      Mikhailov, E. E.; Sautenkov, V. A.; Novikova, I.; Welch, George R. (American Physical Society, 2004)
      We experimentally study the group time delay for a light pulse propagating through hot Rb-87 vapor in the presence of a strong coupling field in a Lambda configuration. We demonstrate that the ultraslow pulse propagation ...
    • Manipulation of the Raman process via incoherent pump, tunable intensity, and phase control 

      Wang, Li-Gang; Qamar, Sajid; Zhu, Shi-Yao; Zubairy, M. Suhail (American Physical Society, 2008)
      We present a proposal to manipulate the Raman process via incoherent pump, tunable intensity, and phase control of the driving fields. It is found that Raman absorptive peaks can become Raman gain peaks by controlling the ...
    • Optically controlled delays for broadband pulses 

      Sun, Q. Q.; Rostovtsev, Y. V.; Dowling, J. P.; Scully, Marlan O.; Zubairy, M. Suhail (American Physical Society, 2005)
      We propose a scheme that provides large controllable delays for broadband optical pulses. The system is based on the steep dispersion of a coherently driven medium, in which the narrow electromagnetically induced transparency ...
    • Tunable phase control for subluminal to superluminal light propagation 

      Sahrai, M.; Tajalli, H.; Kapale, KT; Zubairy, M. Suhail (American Physical Society, 2004)
      We demonstrate tunable control of the group velocity of a weak probe pulse from subluminal to superluminal. The model is an extended Lambda-type system with two extra control fields and an extra energy level. Phase variation ...