14 February 2008 Resonant-enhanced dipolar interaction between THz-photons and confined acoustic phonons in nanostructures
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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.
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Tzu-Ming Liu, Tzu-Ming Liu, Ja-Yu Lu, Ja-Yu Lu, Chung-Chiu Kuo, Chung-Chiu Kuo, Meng-Ju Yang, Meng-Ju Yang, Chih-Wei Lai, Chih-Wei Lai, Pi-Tai Chou, Pi-Tai Chou, Ming-Hao Chang, Ming-Hao Chang, Hsiang-Lin Liu, Hsiang-Lin Liu, Yu-Tai Li, Yu-Tai Li, Ci-Ling Pan, Ci-Ling Pan, Shih-Hung Lin, Shih-Hung Lin, Chieh-Hsiung Kuan, Chieh-Hsiung Kuan, Chi-Kuang Sun, Chi-Kuang Sun, } "Resonant-enhanced dipolar interaction between THz-photons and confined acoustic phonons in nanostructures", Proc. SPIE 6892, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII, 68921C (14 February 2008); doi: 10.1117/12.760547; https://doi.org/10.1117/12.760547


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