Fractals: Localization of dipole excitations and giant optical polarizabilities
Fractals: Localization of dipole excitations and giant optical polarizabilities
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DOI：
10.1016/0378-4371(94)90373-5
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发表时间：
1994-06
影响因子：
3.3
通讯作者：
V. Shalaev;R. Botet;D. Tsai;J. Kovacs;M. Moskovits
中科院分区：
文献类型：
--
作者：
V. Shalaev;R. Botet;D. Tsai;J. Kovacs;M. Moskovits
利用光子扫描隧道显微镜（PSTM）观察了激光在银胶体分形团簇上激发的高度局域化的光学模。激发模式的空间分布显示了数值模拟所建议的频率和偏振选择性。分形上的光激发局域化导致非常高的局域场，导致共振瑞利、拉曼，特别是非线性光散射的极大增强。实验结果验证了分形共振光学理论的主要概念。
Highly localized optical modes laser-excited on silver colloid fractal clusters were observed using photon scanning tunnelling microscopy (PSTM). The spatial distribution of the modes excited shows the frequency and polarization selectivity suggested by numerical simulations. The localization of the optical excitations on fractals results in very high local fields leading to the huge enhancement of resonant Rayleigh, Raman and, especially, nonlinear light scattering. The experimental results verify the main concepts of the developed resonant optical theory of fractals.