Photoconductive imaging in a photon scanning tunnelling microscope capable of point‐contact current sensing using a conductive fibre probe
Photoconductive imaging in a photon scanning tunnelling microscope capable of point‐contact current sensing using a conductive fibre probe
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光子扫描隧道显微镜中的光电导成像，能够使用导电纤维探针进行点接触电流传感
DOI：
10.1046/j.1365-2818.2001.00883.x
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发表时间：
2001
影响因子：
2
通讯作者：
Akira Sasaki
中科院分区：
文献类型：
--
作者：
F. Iwata;D. Someya;H. Sakaguchi;Y. Igasaki;M. Kitao;T. Kubo;Akira Sasaki
为了研究凝聚态物质的点接触光电导特性，研制了一台光电导光子扫描隧道显微镜。为了检测表面上局部点处的电流和光信号，我们在弯曲型光纤探针的边缘涂上氧化铟锡。从而使亚波长分辨率的光电流和光学性质的测量成为可能。通过分析酞菁铜（CuPc）的有机薄膜，这是已知的是一种有效的光电导材料的新型显微镜的性能进行了评估。在CuPc薄膜上的局部点处观察到光电流和电流-电压特性。此外，使用该系统通过形貌和近场光学成像获得光电导图像。光电导光子扫描隧道显微镜在未来光学和电子学的各个领域显示出巨大的潜力。
A photoconductive photon scanning tunnelling microscope was developed to investigate the point‐contact photoconductive properties of condensed matter. In order to detect the current and the optical signal at a local point on a surface, we coated the edge of a bent type fibre probe with indium tin oxide. Thus it was possible to measure both photocurrent and optical property with subwavelength resolution. The performance of the novel microscope was evaluated by analysing an organic thin film of copper phthalocyanine (CuPc), which is known to be an efficient photoconductive material. Photocurrent and current–voltage characteristics were observed at the local point on the CuPc thin films. Furthermore, photoconductive images were obtained with topography and near‐field optical imaging using this system. The photoconductive PSTM shows potential in various areas of future optics and electronics.