Cerenkov generation of high-frequency confined acoustic phonons in quantum wells

Details Cerenkov generation of high-frequency confined acoustic phonons in quantum wells Cerenkov generation of high-frequency confined acoustic phonons in quantum wells

1999-11-23

arxiv.org/abs/cond-mat/9911381v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures. Submitted to APL

Scientific paper

10.1063/1.126195

We analyze the Cerenkov emission of high-frequency confined acoustic phonons by drifting electrons in a quantum well. We find that the electron drift can cause strong phonon amplification (generation). A general formula for the gain coefficient, alpha, is obtained as a function of the phonon frequency and the structure parameters. The gain coefficient increases sharply in the short-wave region. For the example of a Si/SiGe/Si device it is shown that the amplification coefficients of the order of hundreds of 1/cm can be achieved in the sub-THz frequency range.

Affiliated with

Also associated with

No associations

Rating

Cerenkov generation of high-frequency confined acoustic phonons in quantum wells does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Cerenkov generation of high-frequency confined acoustic phonons in quantum wells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cerenkov generation of high-frequency confined acoustic phonons in quantum wells will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-651755