Holographic and Optical Properties of New Molecular Glasses
27. zinātniskās konferences, veltītas LU Pusvadītāju fizikas problēmu laboratorijas un Salaspils Atomreaktora 50 gadu jubilejai: tēzes 2011
Andris Ozols, Valdis Kokars, Pēteris Augustovs, Kaspars Traskovskis, Elmārs Zariņš

Holographic and optical properties of eight new azobenzene molecular glassy films (of K-D-2, W-50, W-49, W-75, W-41-O-1, W-40, W-44, W-44-Si type) on the izochorone and indandione basis. The aim of the work was to study the azobenzene chromophore trans-cis photoisomerization steric chemical activation possibility. Holographic gratings with two micrometer period have been recorded and selfdiffraction efficiency temporal dependences were measured in transmission and reflection modes at both 633 and 532 nm. Besides, transmittance changes have also been measured at 532 nm. All the measurements were carried out by linearly ppolarized laser berams. It is found that different materials are the most efficient in transmission and reflection modes.In contrast to the previously studied stilbene azobenzene derivatives, the new molecular glasses are more efficient in the green spectral region. Sample W-75 was the most efficient (in transmission mode, selfdiffraction efficiency 15% at 532 nm, recording energy – 0.1 kJ/cm 2 %). Trans-cis photoisomerization is believed to be the recording mechanisms thus confirming our assumptions. Photoinduced sample bleaching was observed by 2 to 60%.


Keywords
azobenzene chromophores, organic glasses, holographic recording
Hyperlink
http://www.cfi.lu.lv/fileadmin/user_upload/lu_portal/projekti/cfi/CFI_konferences/abstracts%202011.PDF#page=86

Ozols, A., Kokars, V., Augustovs, P., Traskovskis, K., Zariņš, E. Holographic and Optical Properties of New Molecular Glasses. In: 27. zinātniskās konferences, veltītas LU Pusvadītāju fizikas problēmu laboratorijas un Salaspils Atomreaktora 50 gadu jubilejai: tēzes, Latvia, Rīga, 14-16 February, 2011. Rīga: LU Cietvielu fizikas institūts, 2011, pp.85-85.

Publication language
English (en)
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