Residential College | false |
Status | 已發表Published |
Resonant Raman technique-a powerful tool for exploring electron-phonon coupling in Se nanoclusters | |
Li I.L.2; Zhai J.P.1; Tang Z.K.1; Ruan S.C.2; Zhang M.2 | |
2006-03-31 | |
Conference Name | 20th Congress of the International-Commission-for-Optics |
Source Publication | Proceedings of SPIE - The International Society for Optical Engineering |
Volume | 6029 |
Conference Date | AUG 21-26, 2005 |
Conference Place | Changchun, PEOPLES R CHINA |
Abstract | Raman scattering is an inelastic process, in which we can obtain information about material lattice vibration frequencies. If the wavelength of the excitation laser is within the electronic spectrum of the material, the intensity of some Raman-active vibrations will increase enormously. This resonant Raman effect can be quite useful to explore the electron-phonon coupling in the substance. In this article, we report the investigations on the electron-phonon coupling effect in Se nanoclusters using resonant Raman technique. Up to 10 different laser lines are used in the experiment. The Raman intensity strongly depends on the energy of the laser lines used for excitation. The one-phonon symmetric A modes for Se single helix and Se rings are enhanced in the vicinity of their absorption bands. Detailed analysis shows that the Raman intensity in the high frequency range 450 - 550 cm is a sum of individual second-order Raman scattering intensities for the confined Se species. These two-phonon Raman shifts occur at twice the frequency shift of the first-order Raman lines, and their intensities are also enhanced when the excitation laser energy matches an electronic transition in Se nanoclusters. |
Keyword | Electron-phonon Coupling Nanoclusters Resonant Raman Effect |
DOI | 10.1117/12.667691 |
URL | View the original |
Language | 英語English |
WOS ID | WOS:000235334400023 |
Scopus ID | 2-s2.0-33645237916 |
Fulltext Access | |
Citation statistics | |
Document Type | Conference paper |
Collection | University of Macau |
Affiliation | 1.Hong Kong University of Science and Technology 2.Shenzhen University |
Recommended Citation GB/T 7714 | Li I.L.,Zhai J.P.,Tang Z.K.,et al. Resonant Raman technique-a powerful tool for exploring electron-phonon coupling in Se nanoclusters[C], 2006. |
APA | Li I.L.., Zhai J.P.., Tang Z.K.., Ruan S.C.., & Zhang M. (2006). Resonant Raman technique-a powerful tool for exploring electron-phonon coupling in Se nanoclusters. Proceedings of SPIE - The International Society for Optical Engineering, 6029. |
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