Broadband terahertz ultrasonic transducer based on a laser-driven piezoelectric semiconductor superlattice

A. A. Maznev, Kara J. Manke, Kung Hsuan Lin, Keith A. Nelson, Chi Kuang Sun, Jen Inn Chyi

研究成果: 雜誌貢獻期刊論文同行評審

25 引文 斯高帕斯(Scopus)

摘要

Spectral characteristics of laser-generated acoustic waves in an InGaN/GaN superlattice structure are studied at room temperature. Acoustic vibrations in the structure are excited with a femtosecond laser pulse and detected via transmission of a delayed probe pulse. Seven acoustic modes of the superlattice are detected, with frequencies spanning a range from 0.36 to 2.5 THz. Acoustic waves up to ∼2 THz in frequency are not significantly attenuated within the transducer which indicates excellent interface quality of the superlattice. The findings hold promise for broadband THz acoustic spectroscopy.

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頁(從 - 到)1-4
頁數4
期刊Ultrasonics
52
發行號1
DOIs
出版狀態已出版 - 1月 2012

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