We have performed ultrafast pump-probe spectroscopy studies on a series of InAs/GaSb-based short-period superlattice (SL) samples with periods ranging from 46 \AA to 71 \AA. We observe two types of oscillations in the differential reflectivity with fast ($\sim$ 1- 2 ps)... View more
13. C.-K. Sun, J.-C. Liang, A. Abare, L. Coldren, S. P. Denbaars, and C. J. Stanton, “Large Coherent AcousticPhonon Oscillations in InGaN/GaN Multiple-Quantum Wells,” Appl. Phys. Lett. 75, 1249 (1999).