Determination of the electron effective mass of wurtzite InN by coherent upper-branch A1(LO) phonon-plasmon coupling mode

被引：27

作者：

Chang, Y-M. ^{[1
]}

Chu, H. W.

Shen, C-H.

Chen, H-Y.

Gwo, S.

机构：

[1] Natl Taiwan Univ, Ctr Condensed Matter Sci, Taipei 106, Taiwan

[2] Natl Tsing Hua Univ, Dept Phys, Hsinchu 300, Taiwan

来源：

APPLIED PHYSICS LETTERS | 2007年 / 90卷 / 07期

关键词：

D O I：

10.1063/1.2679926

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Coherent A(1)(LO) phonon and its coupling with photoexcited plasmon in wurtzite InN were generated and detected with time-resolved second-harmonic generation. The experimental results directly reveal that the plasma damping time constant is about 60 similar to 120 fs, which depends on the photoexcited plasma density in InN. The frequency of the upper-branch A(1)(LO) phonon-plasmon coupling mode shifts as a function of the photoexcited plasma density. This frequency shift can be fitted consistently with different InN films by solving the InN dielectric response function and leads to the determination of the electron effective mass m(parallel to)(*)=(0.033 +/- 0.003)m(e), parallel to the c axis of wurtzite InN. (c) 2007 American Institute of Physics.

引用

页数：3

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