OBSERVATION OF SINGLE-PARTICLE PLASMONS BY NEAR-FIELD OPTICAL MICROSCOPY
OBSERVATION OF SINGLE-PARTICLE PLASMONS BY NEAR-FIELD OPTICAL MICROSCOPY
复制标题
DOI：
10.1103/physrevlett.62.458
复制
发表时间：
1989-01-23
影响因子：
8.6
通讯作者：
POHL, DW
中科院分区：
文献类型：
--
作者：
FISCHER, UC;POHL, DW
用扫描近场光学显微镜(SNOM)研究了平坦金膜小突起中的等离子体激元。通过以受控的方式用另一种介质接近它们来选择单个突起。在散射强度与距离的关系方面，观察到了极窄的共振。这一结果为局域等离子体激元研究以及具有更高灵敏度和分辨率的近场光学显微镜开辟了新的机会，例如，在新的地形模式(光学隧道显微镜)下操作。
Plasmons in small protrusions of an otherwise flat gold film were studied with a scanning near-field optical microscope (SNOM). Individual protrusions were selected by approaching them with another medium in a controlled way. Extremely narrow resonances in terms of scattering intensity versus distance were observed. The results open new opportunities for local plasmon studies as well as for SNOM with enhanced sensitivity and resolution, eg, operation in a novel topographic mode (optical tunnel microscopy).