The Single Molecule Probe: Nanoscale Vectorial Mapping of Photonic Mode Density in a Metal Nanocavity
The Single Molecule Probe: Nanoscale Vectorial Mapping of Photonic Mode Density in a Metal Nanocavity
复制标题
DOI：
10.1021/nl803865a
复制
发表时间：
2009-03-01
期刊：
影响因子：
10.8
通讯作者：
van Hulst, Niek F.
中科院分区：
文献类型：
--
作者：
Hoogenboom, Jacob P.;Sanchez-Mosteiro, Gabriel;van Hulst, Niek F.
我们使用超分辨单分子极化和寿命成像来探测金属纳米腔中的局域态密度（LDOS）。确定的分子跃迁偶极子的取向，使我们能够检索不同的LDOS行为的平行和垂直的取向相对于金属界面。对于垂直取向，观察到一个强大的寿命减少的距离高达150 nm的腔边缘由于耦合到表面等离子体极化激元模式在金属。同样，对于平行取向，我们观察到的寿命变化所造成的耦合特性A腔模式。我们的结果是在良好的协议与计算的纳米级变化的投影LDOS，这表明了潜在的单分子作为非微扰，纳米级矢量点探针在光子和生物纳米结构。
We use superresolution single-molecule polarization and lifetime Imaging to probe the local density of states (LDOS) in a metal nanocavity. Determination of the orientation of the molecular transition dipole allows us to retrieve the different LDOS behavior for parallel and perpendicular orientations with respect to the metal Interfaces. For the perpendicular orientation, a strong lifetime reduction is observed for distances up to 150 nm from the cavity edge due to coupling to surface plasmon polariton modes In the metal. Contrarily, for the parallel orientation we observe lifetime variations resulting from coupling to characteristic A cavity modes. Our results are In good agreement with calculations of the nanoscale variations of the projected LDOS, which demonstrates the potential of single molecules as nonperturbative, nanoscale vectorial point probes In photonic and biological nanostructures.