Photoinduced Spontaneous Surface Relief Gratings In Azo Glass Material
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Authors
Edmond, Kyle
Date
2025-02-07
Type
thesis
Language
eng
Keyword
Azo , Diffraction , Surface relief grating , Spontaneous surface relief grating , Light-induced formation , Photoizomerization , Photoizomers
Alternative Title
Abstract
This work investigates the formation of surface relief gratings (SRGs) on an azobenzene thin film when irradiated with a 532nm laser. The formation of linear gratings is created when exposed to a linearly polarized light, with the gratings formed parallel to the lights polarization. Adjusting the orientation of the lights polarization will result in a matching grating in the same direction. The growth of the SRGs is monitored by following the intensity of the first node via pass-through diffraction. The intensity pattern shows two operating functions over time, one which is actue and one which is longer. In attempt to obtain chirality from an isotropic beam, the azobenzene sample was rotated during growth period to obtain non-uniform, globule shaped structures which indicate non-symmetric properties. The SRGs formed are observed and studied through atomic force microsocpy, in which the grating pitch, orientation and overall structure can be observed. The resulting formations from rotating the sample at incidence, does in fact show varying degrees of anisotropy, however they do not show any clear or certain chiral features.
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ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.