Optical second and third harmonic generation on excitons in ZnSe/BeTe quantum wells
Optics
2020-10-07 v1 Mesoscale and Nanoscale Physics
Abstract
Optical harmonic generation on excitons is found in ZnSe/BeTe quantum wells with type-II band alignment. Two experimental approaches with spectrally-broad femtosecond laser pulses and spectrally-narrow picosecond pulses are used for spectroscopic studies by means of second and third harmonic generation (SHG and THG). The SHG signal is symmetry-forbidden for light propagation along the structure's growth axis, which is the [001] crystal axis, but can be induced by an external magnetic field. The THG signal is detected at zero magnetic field and its intensity is field independent. A group theory analysis of SHG and THG rotational anisotropy diagrams allows us to identify the involved excitation mechanisms.
Keywords
Cite
@article{arxiv.2008.11953,
title = {Optical second and third harmonic generation on excitons in ZnSe/BeTe quantum wells},
author = {Johannes Mund and Andreas Farenbruch and Dmitri R. Yakovlev and Andrei A. Maksimov and Andreas Waag and Manfred Bayer},
journal= {arXiv preprint arXiv:2008.11953},
year = {2020}
}
Comments
11 pages, 17 figures