Resonant-enhanced dipolar interaction between THz-photons and confined acoustic phonons in nanostructures

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

doi:10.1117/12.760547

14 February 2008 Resonant-enhanced dipolar interaction between THz-photons and confined acoustic phonons in nanostructures

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

Author Affiliations +

Proceedings Volume 6892, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XII; 68921C (2008) https://doi.org/10.1117/12.760547
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

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.

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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, and 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); https://doi.org/10.1117/12.760547

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