|
Scanning emitter lifetime imaging microscopy for spontaneous emission control
点击次数：
论文类型：期刊论文
发表刊物：Phys. Rev. Lett.
所属单位：光电学院，国家光电研究中心
刊物所在地：美国
学科门类：工学
项目来源：自然科学基金
文献类型：J
卷号：107
期号：12
页面范围：123602
关键字：无
DOI码：10.1103/PhysRevLett.107.123602
发表时间：2011-09-16
摘要：We report an experimental technique to map and exploit the local density of optical states of arbitrary planar nanophotonic structures. The method relies on positioning a spontaneous emitter attached to a scanning probe deterministically and reversibly with respect to its photonic environment while measuring its lifetime. We demonstrate the method by imaging the enhancement of the local density of optical states around metal nanowires. By nanopositioning, the decay rate of a pointlike source of fluorescence can be reversibly and repeatedly changed by a factor of 2 by coupling it to the guided plasmonic mode of the wire.