https://scholars.lib.ntu.edu.tw/handle/123456789/340702
標題: | Piezoelectricity-induced terahertz photon absorption by confined acoustic phonons in wurtzite CdSe nanocrystals | 作者: | Liu, T.-M. Yang, M.-J. Lai, C.-W. PI-TAI CHOU Chang, M.-H. Liu, H.-L. CHI-KUANG SUN |
公開日期: | 2008 | 卷: | 77 | 期: | 8 | 來源出版物: | Physical Review B - Condensed Matter and Materials Physics | 摘要: | We report here the observation of piezoelectricity-induced terahertz photon absorption related to confined acoustic phonons in nanoparticles. Terahertz photon inactive (l=0) breathing modes become terahertz photon active in wurtzite CdSe nanocrystals due to the piezoelectric coupling. Obvious absorption peaks related to (l=0) modes appeared in the terahertz absorption spectra and the frequency of the peaks were inversely proportional to the size of the CdSe nanocrystals. This piezoelectrically coupled electric vibration provides a mechanism for low-dimensional systems to convert a terahertz photon into a phonon of the same frequency. © 2008 The American Physical Society. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-40849087985&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/340702 https://www.scopus.com/inward/record.uri?eid=2-s2.0-40849087985&doi=10.1103%2fPhysRevB.77.085428&partnerID=40&md5=fe37c73d5d72cbb76dc1bc245342f538 |
ISSN: | 10980121 | DOI: | 10.1103/PhysRevB.77.085428 |
顯示於: | 電機工程學系 |
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