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Coherent Acoustic Phonon Amplification in a Strongly Coupled Semiconductor Superlattice under Intraminiband Transport

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Abstract

We report a new technique to amplify coherent acoustic phonons in a semiconductor superlattice under intraminiband transport. The interaction between drift electrons and copropagating acoustic phonons leads to an amplification of the sound amplitude by 200 %.

© 2016 Optical Society of America

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