Near-field circular polarization probed by chiral polyfluorene

被引：15

作者：

Savoini, M. ^{[1
]}

Biagioni, P. ^{[1
]}

Lakhwani, G. ^{[2
]}

Meskers, S. C. J. ^{[2
]}

Duo, L. ^{[1
]}

Finazzi, M. ^{[1
]}

机构：

[1] Politecn Milan, Dipartimento Fis, CNISM, I-20133 Milan, Italy

[2] Eindhoven Univ Technol, NL-5600 MB Eindhoven, Netherlands

来源：

OPTICS LETTERS | 2009年 / 34卷 / 22期

关键词：

OPTICAL MICROSCOPY; FILMS; MOLECULES; LIGHT;

D O I：

10.1364/OL.34.003571

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We demonstrate that a high degree of circular polarization can be delivered to the near field (NF) of an aperture at the apex of hollow-pyramid probes for scanning optical microscopy. This result is achieved by analyzing the dichroic properties of an annealed thin polymer film containing a chiral polyfluorene derivative, placed in close proximity to the optical probe. We also prove that the degree of circular polarization in the probe NF does not depend in a significant way on the shape of the aperture, at variance with the far-field behavior. These results demonstrate the feasibility of nano-optics applications exploiting circularly polarized NFs. (C) 2009 Optical Society of America

引用

页码：3571 / 3573

页数：3

共 16 条

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