Filtering electrons by mode coupling in finite semiconductor superlattices
Abstract
Electron transmission through semiconductor superlattices is studied with transfer matrix method and resonance theory. The formation of electron band-pass transmission is ascribed to the coupling of different modes in those semiconductor superlattices with the symmetric unit cell. Upon Fabry-P\'erot resonance condition, Bloch modes and two other resonant modes are identified to be related to the nature of the superlattice and its unit cell, respectively. The bands related to the unit cell and the superlattice overlap spontaneously in the tunneling region due to the shared wells, and the coupling of perfectly resonances results in the band-pass tunneling. Our findings provide a promising way to study electronic systems with more complicated superlattices or even optical systems with photonic crystals.
Cite
@article{arxiv.2109.12905,
title = {Filtering electrons by mode coupling in finite semiconductor superlattices},
author = {Xiaoguang Luo and Jian Shi and Yaoming Zhang and Ziang Niu and Dongpeng Miao and Huiru Mi and Wei Huang},
journal= {arXiv preprint arXiv:2109.12905},
year = {2022}
}
Comments
15 pages, 4 figures