Coherent phonons, nanoseismology and THz radiation in InGaN/GaN heterostructures

Coherent phonons, nanoseismology and THz radiation in InGaN/GaN heterostructures

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 i...

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Veröffentlicht in:Superlattices and microstructures 2003-09, Vol.34 (3), p.525-529
Hauptverfasser: Stanton, C.J, Sanders, G.D, Liu, R, Chern, G.W, Sun, C.-K, Yahng, J.S, Jho, Y.D, Sohn, J.Y, Oh, E, Kim, D.S
Format: Artikel
Sprache:eng
Schlagworte:
Coherent phonons
Nanoseismology
THz radiation
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Zusammenfassung: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.
ISSN:0749-6036
1096-3677
DOI:10.1016/j.spmi.2004.03.053