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High-sensitivity and high-spatial-resolution imaging of self-assembled monolayer on platinum using radially polarized beam excited second-harmonic-generation microscopy
被引:7
作者:
Hashimoto, Mamoru
[1
]
Niioka, Hirohiko
[1
]
Ashida, Koichiro
[1
]
Yoshiki, Keisuke
[2
]
Araki, Tsutomu
[1
]
机构:
[1] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan
[2] Univ Hyogo, Grad Sch Engn, Himeji, Hyogo 6712201, Japan
基金:
中国国家自然科学基金;
关键词:
GENERATION;
LIGHT;
DEVICES;
D O I:
10.7567/APEX.8.112401
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
High-sensitivity, high-spatial-resolution imaging of organic monolayers on platinum with second harmonic generation (SHG) microscopy using radially polarized beam excitation is investigated. A tightly focused, radially polarized beam forms a longitudinal electric field at the focus. The longitudinal field is enhanced at a metal surface and increases the intensity of SHG from the molecules on the metal surface. The SHG signal from a self-assembled monolayer (SAM) on a platinum surface excited by a radially polarized beam is approximately 3.7 times higher than that obtained with a linearly polarized beam. Improved spatial resolution is also demonstrated using a SAM patterned by electron beam lithography. (C) 2015 The Japan Society of Applied Physics
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