Ultrafast E(1)(LO) phonon and plasma dynamics in a-plane wurtzite InN

作者：Chang Y M^*; Lin H W; Hong Y L; Gwo S

来源：Journal of Applied Physics, 2008, 104(3): 036105.

DOI：10.1063/1.2968207

Coherent phonon spectroscopy of an a-plane wurtzite InN epitaxial thin film is demonstrated with time-resolved second-harmonic generation technique. Coherent E(1)(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 E(1)(LO) phonons and photoexcited plasmons, two hybridized vibration modes, phononlike (L-) and plasmonlike (L+) E(1)(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.

• 出版日期2008-8-1
• 单位清华大学