| Autor: |
Lethiec, Clotilde, Laverdant, Julien, Vallon, Henri, Javaux, Clémentine, Dubertret, Benoît, Frigerio, Jean-Marc, Schwob, Catherine, Coolen, Laurent, Maître, Agnès |
| Rok vydání: |
2013 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. X 4 (2014) 021037 |
| Druh dokumentu: |
Working Paper |
| Popis: |
We demonstrate theoretically and experimentally that the three-dimensional orientation of a single fluorescent nano-emitter can be determined by polarization analysis of the emitted light (while excitation polarization analysis provides only the in-plane orientation). The determination of the emitter orientation by polarimetry requires a theoretical description including the objective numerical aperture, the 1D or 2D nature of the emitting dipole and the environment close to the dipole. We develop a model covering most experimentally relevant microscopy configurations and provide analytical relations useful for orientation measurements. We perform polarimetric measurements on high-quality core-shell CdSe/CdS nanocrystals and demonstrate that they can be approximated by two orthogonal degenerated dipoles. Finally, we show that the orientation of a dipole can be inferred by polarimetric measurement even for a dipole in the vicinity of a gold film, while in this case the well-established defocused microscopy is not appropriate. |
| Databáze: |
arXiv |
| Externí odkaz: |
|
