Phonon amplification

Fabrizio Tafuri, C. A. Perroni, G. De Filippis

Feng Peng

The phonon amplification effect occurring in a single-walled nanotube was discussed,and the change rates of phonon population at different temperatures were calculated by using a time-dependent-perturbation method.It is shown that the optical phonon population increases nonlinearly with increasing laser field and the rate decreases as the temperature increases.At a definite temperature,the more intense the laser field is,the more remarkable the phonon amplification effect is,and a reasonable interpretation on this phenomenon was presented.

B. R. Sood

Possibility of phonon amplification by stimulated emission is discussed by considering the requirements from crystals for achieving longer lifetimes of optical phonons. Using an appropriately chosen crystal a simple experiment for observing phonon amplification is suggested.

Ling-Juan Feng, Yu You, Hengxing Dong +2 more

We present a proposal to enhance the cross-Kerr coupling between the cavity and the mechanical oscillator significantly. Specifically, the periodic modulation of the mechanical spring constant induces strong mechanical parametric amplification, which leads to the cross-Kerr nonlinear enhancement. Also, we discuss its application in photon-phonon blockade and phonon-number measurement. We find that under the strong cross-Kerr coupling condition, not only the photon-phonon blockade effect is dramatically enhanced but also different phonon number is clearly distinguished. Our results offer an alternative approach to perform quantum manipulation between photon and phonon.

Walter E. Bron, Wolfgang Grill