Quantum derivatives and high-frequency gain in semiconductor superlattices
Mesoscale and Nanoscale Physics
2007-05-23 v1
Abstract
We derive simple difference formulas describing a small-signal absorption of THz field in a semiconductor superlattice driven by a microwave pump. We give a transparent geometric interpretation of these formulas that allows a search of optimum conditions for the gain employing only a simple qualitative analysis. Our theoretical approach provides a powerful tool for finding the correspondence between quasistatic and dynamic regimes in ac-driven semiconductor superlattices.
Keywords
Cite
@article{arxiv.cond-mat/0602546,
title = {Quantum derivatives and high-frequency gain in semiconductor superlattices},
author = {A. V. Shorokhov and K. N. Alekseev},
journal= {arXiv preprint arXiv:cond-mat/0602546},
year = {2007}
}
Comments
Submitted to proceedings of 4th Int. Symp. Nanostructures: Physics and Technology (St Petersburg, Russia, June 26-30, 2006). For detailed consideration see in cond-mat/0602209