Laboratory of Optical Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100190, China.
Opt Lett. 2011 Apr 1;36(7):1296-8. doi: 10.1364/OL.36.001296.
We report on the efficient surface plasmon amplification by stimulated emission of radiation (spaser) from a gold nanorod coated with proper gain media. Numerical simulations show that the threshold of the nanorod-based spaser is nearly 1 order of magnitude lower than that of the core-shell nanosphere, which is verified by analysis with electrostatic theory. Furthermore, it is found that the nanorod-based nanosystem possesses unique optical properties such as wavelength tunability and polarization sensitivity.
我们报道了一种通过受激辐射放大表面等离子体（spaser）的高效方法，该方法来自涂有适当增益介质的金纳米棒。数值模拟表明，基于纳米棒的 spaser 的阈值比核壳纳米球低近 1 个数量级，这一结果通过静电理论的分析得到了验证。此外，我们还发现基于纳米棒的纳米系统具有独特的光学性质，如波长可调谐性和偏振敏感性。
