標題: Magnitude-tunable sub-THz shear phonons in a non-polar GaN multiple-quantum-well p-i-n diode
作者: Chen, Chien-Cheng
Huang, Huei-Min
Lu, Tien-Chang
Kuo, Hao-Chung
Sun, Chi-Kuang
光電工程學系
Department of Photonics
公開日期: 14-May-2012
摘要: Coherent transverse acoustic phonons are optically generated and detected through the piezoelectric coupling between the build-in electric fields and shear strains of a non-polar GaN multiple quantum wells embedded in a p-n junction. By optical transient transmission change measurement, the phonon frequency is observed to be 0.4 THz which corresponds to a wavelength of 12.5 nm, the periodicity of the multiple quantum wells, and the estimated phonon velocity corresponds to the transverse acoustic phonon velocity in GaN. Moreover, we can magnify the driving amplitude of the generated shear phonons by increasing the reverse bias of the p-i-n diode. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4718524]
URI: http://dx.doi.org/201905
http://hdl.handle.net/11536/16309
ISSN: 0003-6951
DOI: 201905
期刊: APPLIED PHYSICS LETTERS
Volume: 100
Issue: 20
結束頁: 
Appears in Collections:Articles


Files in This Item:

  1. 000304265000027.pdf

If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.