Phononic Transistor

Author: Ramaz Khomeriki
Co-authors: Merab Malishava
Keywords: Nonlinear Phonons, Gap Solitons
Annotation:

A conceptual mechanism of amplification of phonons by phonons on the basis of a nonlinear band-gap transmission (supratransmission) phenomenon is presented. As an example, a system of weakly coupled chains of anharmonic oscillators is considered. One (source) chain is driven harmonically by a boundary with a frequency located in the upper band close to the band edge of the ladder system. Amplification happens when a second (gate) chain is driven by a small signal in the counterphase and with the same frequency as the first chain. If the total driving of both chains overcomes the band-gap transmission threshold, the large amplitude band-gap soliton emerges and the amplification scenario is realized. The results could be straightforwardly generalized for all-optical or all-magnonic contexts and have all the promise of logic gate operations.