Measuring the orientation of a single CdSe/CdS nanocrystal at the end of a near-field tip for the realization of a versatile active SNOM probe

被引：4
作者：
Jazi, R. [1 ]
Ung, T. P. L. [1 ]
Maso, P. [1 ]
Des Francs, G. Colas [2 ]
Nasilowski, M. [3 ]
Dubertret, B. [3 ]
Hermier, J. -P. [1 ]
Quelin, X. [1 ]
Buil, S. [1 ]
机构：
[1] Univ Paris Saclay, GEMaC, CNRS UMR8635, Univ Versailles Saint Quentin En Yvelines, 45 Ave Etats Unis, F-78035 Versailles, France
[2] Univ Bourgogne Franche Comte, UMR CNRS 6303, Lab Interdisciplinaire Carnot Bourgogne ICB, 9 Ave Savary,BP 47870, F-21078 Dijon, France
[3] UPMC Univ Paris06, Sorbonne Univ, Lab Phys & Etud Mat, ESPCI,CNRS UMR8213, 10 Rue Vauquelin, F-75231 Paris, France
来源：
PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2018年 / 20卷 / 24期
关键词：
LOCAL-DENSITY; OPTICAL MICROSCOPY; FLUORESCENCE; EMITTER; STATES; MOLECULE; TIME;
D O I：
10.1039/c8cp02147c
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：
The orientation of a CdSe/CdS nanocrystal attached at the end of a scanning near field optical microscope (SNOM) tip is analyzed by its coupling with a flat gold layer. The Purcell factors for a set of distances to the gold surface are measured after a NC is caught by a SNOM tip. These measurements are compared with the modeling of the emission of a 2D dipole on a gold layer taking into account the layer of polymer serving as a glue for the NC. The 2D dipole is perpendicular to the c-axis of the NC, which is the growth axis. The behavior of the Purcell factor as a function of the distance to the gold layer depends on the angle made by this axis and the surface. The adjustment of the experimental results and the modelization gives the orientation of the NC at the end of the SNOM tip. Different orientations of the c-axis are determined.
引用
收藏
页码：16444 / 16448
页数：5
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