| Autor: |
Chakravarthy, Giridhar, Allam, Srinivasa Rao, Sharan, Alok, Ghosh, Oriparambil Sivaraman Nirmal, Gayathri, Sethuraman, Viswanath, Annamraju Kasi, Prabhakar, M. N., Song, Jung-Il |
| Předmět: |
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| Zdroj: |
Journal of Nonlinear Optical Physics & Materials; Jun2016, Vol. 25 Issue 2, p-1, 12p |
| Abstrakt: |
Nanoparticles of Titanium dioxide with its unique optical and electronic characteristics is an important material for photochemical catalysis. The efficiency of catalytic activity of anatase nanostructures is greatly influenced by the photo-generated bound excitons. It is found that the interaction of bound excitons generated in enhances the cubic nonlinearity of the system due to strong oscillation of photo-generated bound excitons. The trapped electron hole pair concentration is directly proportional to the photocatalytic efficiency of the anatase nanostructures. In our report, we show how these photo-generated bound excitons play a significant role in origin of third-order optical nonlinearities. In particular, we have measured large phase shift and seen two photon absorption process through closed and open aperture Z-scan, respectively, using femtosecond pulses at 532nm. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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