用于极大增强和控制光发射偏振的多粒子纳米天线。

Multiple-particle nanoantennas for enormous enhancement and polarization control of light emission.

作者信息

Li Zhipeng, Shegai Timur, Haran Gilad, Xu Hongxing

机构信息

Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

出版信息

ACS Nano. 2009 Mar 24;3(3):637-42. doi: 10.1021/nn800906c.

DOI:10.1021/nn800906c

PMID:19222232

Abstract

We investigate the light emission from dipolar emitters located within nanoparticle antennas. It is found that the enormous emission enhancement can reach nearly a million fold. For multinanoparticle antennas, the polarization of the emissions strongly depends on the geometry of the antennas, the emitted wavelengths, and the dielectric functions of surrounding media. It is shown that a polarization nanorotator, which modulates the emission polarization on the nanometer scale, can be readily realized by varying either the geometry or surrounding media of nanoparticle antennas.

摘要

我们研究了位于纳米颗粒天线内的偶极发射器的光发射。结果发现，巨大的发射增强可达近百万倍。对于多纳米颗粒天线，发射的极化强烈依赖于天线的几何形状、发射波长以及周围介质的介电函数。结果表明，通过改变纳米颗粒天线的几何形状或周围介质，可轻松实现一种在纳米尺度上调制发射极化的极化纳米旋转器。