Surface Plasmon Polariton Interference in Gold Nanoplates

被引：10
作者：
Beane, Gary [1 ]
Yu, Kuai [2 ]
Devkota, Tuphan [1 ]
Johns, Paul [1 ]
Brown, Brendan [1 ]
Wang, Guo Ping [2 ]
Hartland, Gregory [1 ]
机构：
[1] Univ Notre Dame, Dept Chem & Biochem, Notre Dame, IN 46556 USA
[2] Shenzhen Univ, Coll Elect Sci & Technol, Shenzhen 518060, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2017年 / 8卷 / 19期
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
CHEMICALLY SYNTHESIZED GOLD; NEAR-FIELD CHARACTERIZATION; PUMP-PROBE MICROSCOPY; STRIP WAVE-GUIDES; SILVER NANOWIRES; METAL STRIPES; PROPAGATION; MODES; NANOSTRUCTURES; SPECTROSCOPY;
D O I：
10.1021/acs.jpclett.7b02079
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Transient absorption microscopy (TAM) measurements have been used to study the optical properties of surface plasmon polariton (SPP) modes in gold nanoplates on a glass substrate. For thin gold nanoplates, the TAM images show an oscillation in the signal across the plate due to interference between the "bound" and "leaky" SPP modes. The wavelength of the interference pattern is given by lambda = 2 pi/Delta k, where Delta k is the difference between the wavevectors for the bound and leaky modes and is sensitive to the dielectric constant of the material above the gold nanoplate. Back focal plane imaging was also used to measure the wavevector of the leaky mode, which, in combination with the Delta k information from the TAM images, enabled the bound mode wavevector to be determined. These experiments represent the first far-field optical measurement of the wavevector for the bound mode in metal nanostructures.
引用
收藏
页码：4935 / 4941
页数：7
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