Ultrafast E1 (LO) phonon and plasma dynamics in a -plane wurtzite InN
Journal
Journal of Applied Physics
Journal Volume
104
Journal Issue
3
Pages
036105-1 - 036105-3
Date Issued
2008
Author(s)
Abstract
Coherent phonon spectroscopy of an a-plane wurtzite InN epitaxial thin film is demonstrated with time-resolved second-harmonic generation technique. Coherent E1(LO) phonons are launched via a transient electric field screening process in the near surface region of the a-plane wurtzite InN. Because of the macroscopic electric dipole interaction between coherent E1(LO) phonons and photoexcited plasmons, two hybridized vibration modes, phononlike (L−) and plasmonlike (L+) E1(LO) phonon-plasmon coupling modes, are identified. The investigation of these coupling modes allows us to understand the ultrafast carrier and phonon dynamics in a-plane wurtzite InN.
Publisher
American Institute of Physics
Type
journal article