Modification of Nonlinear Optical Properties in CdSe/PBMA Film by High Intensity Light |
| V. Kovalevskija and V. Gulbinasa,b
aInstitute of Physics, Savanoriu pr. 231, 02300 Vilnius, Lithuania bVilnius University, Saulėtekio al. 9, bldg 3. 2040 Vilnius, Lithuania |
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| Received: 22 08 2004; |
| Excitation-relaxation dynamics in CdSe nanocrystals passivated with tri-n-octylphosphine oxide and embedded in the poly(butylmethacrylate) polymer was investigated before and after their irradiation by high intensity laser pulses. The irradiation causes a significant bleaching of the sample absorption as well as the shift of the lowest energy absorption band to the short wavelength side. The film irradiation reduces the nonlinear transient absorption bleaching on the long wavelength side of the low energy absorption band, however, it has only minor influence on the transient absorption relaxation. |
| DOI: 10.12693/APhysPolA.107.351 PACS numbers:78.67.-n |