Theoretical Study of Local Surface Plasmon Resonances on a Dielectric-Ag Core-Shell Nanosphere Using the Discrete-Dipole Approximation Method
-
Abstract
The local surface plasmon resonances (LSPRs) of dielectric-Ag core-shell nanospheres are studied by the discrete-dipole approximation method. The result shows that LSPRs are sensitive to the surrounding medium refractive index, which shows a clear red-shift with the increasing surrounding medium refractive index. A dielectric-Ag core-shell nanosphere exhibits a strong coupling between the core and shell plasmon resonance modes. LSPRs depend on the shell thickness and the composition of dielectric-core and metal-shell. LSPRs can be tuned over a longer wavelength range by changing the ratio of core to shell value. The lower energy mode ω? shows a red-shift with the increasing dielectric-core value and the inner core radius, while blue-shifted with the increasing outer shell thickness. The underlying mechanisms are analyzed with the plasmon hybridization theory and the phase retardation effect. -
References
-
Related Articles
[1] WANG Gui-Qiang, HUANG Cong-Cong, XING Wei, ZHUO Shu-Ping. Hierarchical Porous Carbon Counter Electrode for Dye-Sensitized Solar Cells [J]. Chin. Phys. Lett., 2011, 28(3): 038801. doi: 10.1088/0256-307X/28/3/038801 [2] XU Wei-Wei, HU Lin-Hua, DAI Song-Yuan, ZHANG Chang-Neng, LUO Xiang-Dong, JING Wei-Ping. A Study on Porosity Distribution in Nanoporous TiO_2 Photoelectrodes for Output Performance of Dye-Sensitized Solar Cells [J]. Chin. Phys. Lett., 2010, 27(3): 038202. doi: 10.1088/0256-307X/27/3/038202 [3] ZHOU Yan-Fang, XIANG Wan-Chun, FANG Shi-Bi, CHEN Shen, ZHOU Xiao-Wen, ZHANG Jing-Bo, LIN Yuan. Effect of Poly(Ether Urethane) Introduction on the Performance of Polymer Electrolyte for All-Solid-State Dye-Sensitized Solar Cells [J]. Chin. Phys. Lett., 2009, 26(12): 128201. doi: 10.1088/0256-307X/26/12/128201 [4] ZHANG Yong-Zhe, WU Li-Hui, LIU Yan-Ping, XIE Er-Qing, YAN De, CHEN Jiang-Tao. Preparation of ZnO Nanospheres and Their Applications in Dye-Sensitized Solar Cells [J]. Chin. Phys. Lett., 2009, 26(3): 038201. doi: 10.1088/0256-307X/26/3/038201 [5] ZHAO Hui, YIN Xiong, LI Heng, LIN Yuan, WENG Yu-Xiang. Explanation of Effect of Added Water on Dye-Sensitized Nanocrystalline TiO2 Solar Cell: Correlation between Performance and Carrier Relaxation Kinetics [J]. Chin. Phys. Lett., 2007, 24(11): 3272-3275. [6] LIU Xi-Zhe, HUANG Zhen, LI Ke-Xin, LI Hong, LI Dong-Mei, CHEN Li-Quan, MENG Qing-Bo. Recombination Reduction in Dye-Sensitized Solar Cells by Screen-Printed TiO2 Underlayers [J]. Chin. Phys. Lett., 2006, 23(9): 2606-2608. [7] HU Lin-Hua, DAI Song-Yuan, WANG Kong-Jia. Influence of Particle Coordination Number in Nanoporous TiO2 Films on the Performance of Dye-Sensitized Solar Cell Modules [J]. Chin. Phys. Lett., 2005, 22(2): 493-495. [8] ZENG Long-Yue, DAI Song-Yuan, WANG Kong-Jia, PAN Xu, SHI Cheng-Wu, GUO Li. Mechanism of Enhanced Performance of Dye-Sensitized Solar Cell Based TiO2 Films Treated by Titanium Tetrachloride [J]. Chin. Phys. Lett., 2004, 21(9): 1835-1837. [9] LIU Xi-Zhe, MENG Qing-Bo, GAO Chun-Xiao, XUE Bo-Fei, WANG Hong-Xia, CHEN Li-Quan, O. Sato, A. Fujishima. Optical Design of Dye-Sensitized Nanocrystalline Solar Cells [J]. Chin. Phys. Lett., 2004, 21(7): 1384-1387. [10] DAI Song-Yuan, WANG Kong-Jia. Optimum Nanoporous TiO2 Film and Its Application to Dye-sensitized Solar Cell [J]. Chin. Phys. Lett., 2003, 20(6): 953-955.