Two-photon near-field mapping of local molecular orientations in hexaphenyl nanofibers

被引：9
|
作者：
Beermann, J
Bozhevolnyi, SI
Balzer, F
Rubahn, HG
机构：
[1] Univ Aalborg, Dept Phys & Nanotechnol, DK-9220 Aalborg E, Denmark
[2] Humboldt Univ, Inst Phys ASP, D-12489 Berlin, Germany
[3] SDU Odense, Inst Fys, DK-5230 Odense, Denmark
来源：
LASER PHYSICS LETTERS | 2005年 / 2卷 / 10期
关键词：
nonlinear optics; near-field scanning optical microscopy; optical properties of nanocrystalline materials; nanoscale materials and structures;
D O I：
10.1002/lapl.200510028
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Two-photon excited near field images of hexaphenyl nanofibers are obtained using a scanning near field optical microscope in transmission configuration. From polarized measurements the orientations of the molecular basis units of the fibers are determined with a resolution of better than 400 nm. The molecular orientation angles obtained are comparable to results from two-photon scanning far-field microscopy, but the present measurements provide a better spatial resolution. From this near-field data it is concluded that the molecules can be oriented either very homogeneously or with some scatter in otherwise similar organic nanoaggregates.
引用
收藏
页码：480 / 484
页数：5
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