https://scholars.lib.ntu.edu.tw/handle/123456789/340701
Title: | Resonance-enhanced dipolar interaction between terahertz photons and confined acoustic phonons in nanocrystals | Authors: | Liu, T.-M. CHIEH-HSIUNG KUAN PI-TAI CHOU CHI-KUANG SUN Lin, Shih-Hung Chang, Ming-Hao Lai, Chih-Wei Yang, Meng-Ju Chou, Pi-Tai Kuo, Chung-Chiu Chen, Hung-Ping Lu, Ja-Yu |
Issue Date: | 2008 | Journal Volume: | 92 | Journal Issue: | 9 | Source: | Applied Physics Letters | Abstract: | Taking advantage of the specific core-shell charge separation structure in the CdSeCdTe core-shell type-II nanocrystals, we experimentally observed and verified the existence of the resonance-enhanced dipolar interaction between terahertz photons and their corresponding confined acoustic phonons. From the measured terahertz transmission spectra, we found that the photon frequency of the terahertz resonant absorption is inversely proportional to the diameter D of the nanocrystals and agrees with that of dipolar active l=1, n=0 confined acoustic modes. The corresponding absorption cross section shows a D4 dependence, supporting a charged simple-harmonic-oscillator model. These facts verify the occurrence of dipolar interaction between terahertz photons and confined terahertz acoustic phonons. © 2008 American Institute of Physics. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-40549144905&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/340701 |
ISSN: | 00036951 | DOI: | 10.1063/1.2891062 | SDG/Keyword: | Absorption; Crystal structure; Phonons; Photons; Acoustic phonons; Resonance-enhanced dipolar interaction; Terahertz photons; Terahertz transmission spectra; Nanocrystals |
Appears in Collections: | 電機工程學系 |
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