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Conferences > QO > 1993 > QThC > QThC.2

Time Resolved Optical Orientation Used to Examine Coulomb Screening and Phase Space Filling in Quantum Well Excitonic Saturation

M. J. Snelling, P. Perozzo, R. Bambha, A. Miller, and D. C. Hutchings

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Abstract

Picosecond pulses from a mode locked dye laser were used in an excite-probe configuration (figure 1) with excite and probe beam powers of 200uW and 20uW respectively. Both beams were polarised to produce either mutually orthogonal linear polarisations (linear-linear), the same circular polarisation (same-circular), or opposite circular polarisation (opposite-circular). The sample was fabricated by MBE with a p-type background doping of 1016cm-3, etched to remove the GaAs substrate, and consisted of 120 periods of 65Å quantum wells with 212Å AI0.4Ga0.6As barriers.

© 1993 Optical Society of America

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