Coherent phonons, nanoseismology and THz radiation in InGaN/GaN heterostructures
Journal
Superlattices and Microstructures
Journal Volume
34
Journal Issue
3-6
Pages
525-529
Date Issued
2003
Author(s)
Abstract
The ultrafast optical photoexcitation of hot electrons and holes in semiconductors by femtosecond laser pulses can trigger coherent phonon oscillations. We discuss the huge coherent acoustic phonons which have been generated in InGaN/GaN heterostructures and epilayers and how they might be used in imaging of surfaces and interfaces in nanostructures. We also discuss the THz radiation emitted from these phonons. © 2004 Elsevier Ltd. All rights reserved.
Type
journal article