| Investigation of KTiOPO_4 nanocrystals by means of second-harmonic light emission |
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| 作者姓名： | Loc Le Xuan Abdallah Slablab Nicolas Sandeau Sophie Brasselet Dominique Chauvat Jean-Franois Roch |
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| 基金项目： | This work was supported by the AC Nanoscience Research Program and by Institut Universitaire de France |
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| 摘 要： | The finding of nonlinear nanometric-sized probes is of key importance for the development of nonlinear microscopy in physical as well as biological sciences.We isolate nonlinear KTiOPO_4 nanocrystals and study them by second-harmonic generation microscopy(SHGM)and atomic force microscopy(AFM) independently.With both polarization analysis and defocused imaging of the emitted second harmonic field,we extract the Euler angles of the crystalline axes of a single nanocrystal.A balanced coherent optical homodyne detection shows tire coherent nature of the nanocrystal nonlinear emission and allows a phase measurement of the emitted second-harmonic field.These features make the KTiOPO_4 nanocrystal a good candidate for a vectorial probe of electromagnetic near fields.
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