Acoustic manipulation of electron–hole pairs in GaAs at room temperature

de Lima, M. M.; Hey, R.; Stotz, J. A. H.; Santos, P. V.
April 2004
Applied Physics Letters;4/5/2004, Vol. 84 Issue 14, p2569
Academic Journal
We demonstrate the optically detected long-range (>100 μm) ambipolar transport of photogenerated electrons and holes at room temperature by surface acoustic waves (SAWs) in (In,Ga)As-based quantum well structures coupled to an optical microcavity. We also show the control of the propagation direction of the carriers by a switch composed of orthogonal SAW beams, which can be used as a basic control gate for information processing based on ambipolar transport. © 2004 American Institute of Physics.


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