Photoionization cross section of a hydrogenic impurity in a piezoelectric core-shell nanowire

DOI

10.2991/978-94-6463-330-6_16How to use a DOI?

Keywords

Photoionization cross section; impurity; piezoelectric polarization; core-shell nanowire

Abstract

The photoionization cross section (PCS) of a hydrogenic-like impurity in a piezoelectric core-shell nanowire is investigated by a variational method combined with a finite-difference algorithm. The quantum Stark effect caused by the piezoelectric field, the quantum confinement effect due to structural dimension and the electron-impurity coulombic interaction are taken into account for analyzing the photoionization properties of different types of electronic intersubband transitions. Two types of optical transitions, i.e., the transition from the impurity ground state to the unbound electron ground state and the transition between the impurity states, are involved in our numerical calculation. The PCS shows an obvious resonant peak for each optical transition, especially from the impurity high-energy states in core-shell NWs. The peak position and intensity are more sensitive to core radius than impurity position. The quantum Stark effect plays a more important role in the variation of PCS when the impurity appears in the core region but becomes less influential when the impurity moves to the shell region. Our method can be easily applied in other low-dimensional nanostructures.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Sihua Ha
AU  - Jun Zhu
PY  - 2023
DA  - 2023/12/31
TI  - Photoionization cross section of a hydrogenic impurity in a piezoelectric core-shell nanowire
BT  - Proceedings of the International Conference on Applied Sciences and Engineering (ICASE 2023)
PB  - Atlantis Press
SP  - 118
EP  - 124
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-330-6_16
DO  - 10.2991/978-94-6463-330-6_16
ID  - Ha2023
ER  -