Photostable second-harmonic generation from a single KTiOPO4 nanocrystal for nonlinear microscopy
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Yksityiskohdat
| Alkuperäiskieli | Englanti |
|---|---|
| Sivut | 1332-1336 |
| Sivumäärä | 5 |
| Julkaisu | Small |
| Vuosikerta | 4 |
| Numero | 9 |
| DOI - pysyväislinkit | |
| Tila | Julkaistu - syyskuuta 2008 |
| Julkaistu ulkoisesti | Kyllä |
| OKM-julkaisutyyppi | A1 Alkuperäisartikkeli |
Tiivistelmä
A study was conducted to report the observation and the characterization of nanometric-sized crystals extracted by centrifugation from KTP (potassium titanyl phosphate) powder. In situ atomic force microscopy (AFM) analysis of its size and analysis of its second-harmonic emission properties were performed for a well-isolated single nanocrystal. The highly efficient nonlinear response leads to the emission of several SHG photons and in a photostable and blinking-free manner due to non-resonant coherent interaction. The study retrieved the in situ three-dimensional crystal orientation by recovering the radiation pattern from the recorded defocused images. Solution-based chemical synthesis of KTP nanocrystals with a monodisperse size controlled by capping agents should lead to optimized KTP nanocrystallites and to a more accurate estimate of the size-detection threshold. Fully characterized nano-KTPs are also attractive for the development of novel schemes of nonlinear microscopy.