Coherent Control of Resonant Rayleigh Scattering

✍ Scribed by Kennedy, S.P. ;Garro, N. ;Phillips, R.T. ;Ploog, K.H.

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 148 KB
• Volume: 178
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/1521-396x(200003)178:1<397::aid-pssa397>3.0.co;2-z

✦ Synopsis

Phase-locked pulse pairs are used for resonant excitation of excitons confined within GaAs/ AlGaAs quantum wells. The time-resolved secondary emission displays strong dependence on the relative phases of the two pulses for inter-pulse delays of the order of 1ps or less. Constructive interference is combined with an increase in the rise time of the emission following the second pulse. For longer inter-pulse delays the different phases of inhomogeneous excitons complicate the effect of the second pulse, with the apparent effect changing with time after the second pulse. To model this, the optical Bloch equations for a line of three-level systems are integrated over time and the resulting polarisations summed over a range of angles. The importance of the inhomogeneity in descriptions of coherent control of secondary emission is shown.