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Proceedings Paper

Resonant-enhanced dipolar interaction between THz-photons and confined acoustic phonons in nanostructures
Author(s): Tzu-Ming Liu; Ja-Yu Lu; Chung-Chiu Kuo; Meng-Ju Yang; Chih-Wei Lai; Pi-Tai Chou; Ming-Hao Chang; Hsiang-Lin Liu; Yu-Tai Li; Ci-Ling Pan; Shih-Hung Lin; Chieh-Hsiung Kuan; Chi-Kuang Sun
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Paper Abstract

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.

Paper Details

Date Published: 14 February 2008
PDF: 10 pages
Proc. SPIE 6892, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII, 68921C (14 February 2008); doi: 10.1117/12.760547
Show Author Affiliations
Tzu-Ming Liu, National Taiwan Univ. (Taiwan)
Ja-Yu Lu, National Taiwan Univ. (Taiwan)
Chung-Chiu Kuo, National Taiwan Univ. (Taiwan)
Meng-Ju Yang, National Taiwan Univ. (Taiwan)
Chih-Wei Lai, National Taiwan Univ. (Taiwan)
Pi-Tai Chou, National Taiwan Univ. (Taiwan)
Ming-Hao Chang, National Taiwan Normal Univ. (Taiwan)
Hsiang-Lin Liu, National Taiwan Normal Univ. (Taiwan)
Yu-Tai Li, National Chiao Tung Univ. (Taiwan)
Ci-Ling Pan, National Chiao Tung Univ. (Taiwan)
Shih-Hung Lin, National Taiwan Univ. (Taiwan)
Chieh-Hsiung Kuan, National Taiwan Univ. (Taiwan)
Chi-Kuang Sun, National Taiwan Univ. (Taiwan)

Published in SPIE Proceedings Vol. 6892:
Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII
Jin-Joo Song; Kong-Thon Tsen; Markus Betz; Abdulhakem Y. Elezzabi, Editor(s)

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