Collection of transverse and longitudinal fields by means of apertureless nanoprobes with different metal coating characteristics
Collection of transverse and longitudinal fields by means of apertureless nanoprobes with different metal coating characteristics
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DOI：
10.1063/1.1827925
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发表时间：
2004-11-29
影响因子：
4
通讯作者：
Herzig, HP
中科院分区：
文献类型：
--
作者：
Descrovi, E;Vaccaro, L;Herzig, HP
研究了横向和纵向场到无孔径微加工近场光学探头的耦合和传输。考虑了两种具有不同金属涂层粗糙度的探头。通过聚焦液晶板产生的方位角和径向偏振光束来获得横向和纵向场分布。使用微加工探针在收集模式配置中扫描焦平面。研究发现，金属涂层的粗糙度对横向场与探头的耦合强度起着重要作用：粗糙的金属涂层会降低横向场的相对耦合效率，而纵向场的相对耦合效率则不会。 (C) 2004 年美国物理研究所。
The coupling and transmission of transverse and longitudinal fields into apertureless microfabricated near-field optical probes is investigated. Two kinds of probes with different metal coating roughness are considered. Transverse and longitudinal field distributions are obtained by focusing azimuthally and radially polarized beams produced by means of a liquid crystal plate. The focal plane is scanned using microfabricated probes in a collection mode configuration. It is found that the roughness of the metal coating plays an important role in the coupling strength of transverse fields into the probes: the relative coupling efficiency for transverse fields diminishes with a rough metal coating, while that of longitudinal fields does not. (C) 2004 American Institute of Physics.