Open AccessМоделирование ангармонических блоховских осцилляций: численные проблемы и нелинейные эффекты
Author(s) -
К.А. Иванов,
Е.И. Гиршова,
М.А. Калитеевский
Publication year - 2021
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2021.01.50458.18441
Subject(s) - superlattice , physics , work (physics) , bloch wave , condensed matter physics , bloch oscillations , field (mathematics) , statistical physics , mathematics , quantum mechanics , pure mathematics
The work presents robust and fast numerical method for calculation of complex-valued energies and wave functions of carriers in one-dimensional electrically biased periodic structures. Using this method optical transitions were studied in a superlattice (Bloch oscillations). Transition probabilities were shown to disobey linear dependence from applied field when it is large enough; in this case transitional with double and triple Bloch frequency can be more intensive than on single frequency. In a superlattice with a split miniband the same holds, with non-linearity being more pronounced in wider split case.