標題: Resonant-enhanced dipolar interaction between THz-photons and confined acoustic phonons in nanostructures
作者: Liu, Tzu-Ming
Lu, Ja-Yu
Kuo, Chung-Chiu
Yang, Meng-Ju
Lai, Chih-Wei
Chou, Pi-Tai
Chang, Ming-Hao
Liu, Hsiang-Lin
Li, Yu-Tai
Pan, Ci-Ling
Lin, Shih-Hung
Kuan, Chieh-Hsiung
Sun, Chi-Kuang
光電工程學系
Department of Photonics
關鍵字: terahertz;confined acoustic phonons;type-II nanocrystals;piezoelectric nanocrystals
公開日期: 1-Jan-2008
摘要: By using a frequency-controlled narrow band THz source, a Fourier Transform Infrared (FTIR) spectroscopy system, and a frequency-controlled terahertz (THz) emitter, for the first time, we studied the THz photon absorption related to the THz confined acoustic vibrations in semiconductor nanocrystals. Through a specific charge separation in the CdSe/CdTe type-II nanocrystals and a piezoelectric coupling in the wurtzite CdSe nanocrystals, the THz photons can be resonantly coupled with (l=1) dipolar modes and the (l=0) breathing modes, respectively. Our results provide new mechanisms for low dimensional systems to convert a THz photon into a phonon of the same frequency.
URI: http://dx.doi.org/10.1117/12.760547
http://hdl.handle.net/11536/146777
ISBN: 978-0-8194-7067-6
ISSN: 0277-786X
DOI: 10.1117/12.760547
期刊: ULTRAFAST PHENOMENA IN SEMICONDUCTORS AND NANOSTRUCTURE MATERIALS XII
Volume: 6892
起始頁: 0
結束頁: 0
Appears in Collections:Conferences Paper


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