Nanooptics and photonics

Dynamic holographic recording on nanocomposites with various metal and semiconductor particles
Gridyakina А. 1, Bordyuh H.1, Klimusheva G.2, Fedorenko D.2, Kravchuk M.2, Myrna T.3
1 National Aviation University, Prosp. Komarova 1, 03058 Kyiv, Ukraine. 
E-mail: morhin@ukr.net
2 Department of physics of crystals, Institute of Physics of the NAS of Ukraine. Prospect Nauki, 46, Kyiv-03039, Ukraine.
3 Institute of General and Inorganic Chemistry of the NAS of Ukraine, Academician Paladin av., 32-34, Kyiv-03142, Ukraine.

The nonlinear optical properties of anisotropic glasses formed of metal alkanoates doped with various nanoparticles are studied using dynamic holography. Dynamic gratings were induced by the action of nanosecond laser pulses at the wavelength of 539,8 nm. It was found that even a small fraction of nanoparticles in the metal alkanoate matrix is enough to cause effective enhancement of the optical nonlinearity of the studied nanocomposites.
We compared both transparent and absorbing (at 539,8 nm) matrices to figure out the role of nano-sized guest made of semiconductor, metal or core/shell. Since the probe was not applied, we saw only the self-diffraction of the pump-beam on the quickly (ns) developed phase grating due to the fast electronic or plasmon processes in guest.
We assume, that the periods of the recorded gratings are much larger then characteristic length of the nanocomposite and, therefore, have no influence on the manifestation of the grating.
In general, we see the two orders of magnitude enhancement of the nonlinear parameters (n2, χ(3)) caused by incorporation of the nanoparticles into the glassy matrices. This fact together with the high stability of matrices allows efficient appliance of studied nanocomposites in non-linear light-controlling devices.