THIN-LAYER HOLOGRAPHIC PHOTOPOLYMER MATERIALS WITH A LARGE CHANGE IN THE REFRACTIVE INDEX
D. I. Derevianko1, E. F. Pen2,3, V. V. Shelkovnikov1,3, S. I. Aliev1,3
1Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
3Novosibirsk State Technical University, Novosibirsk, Russia
Keywords: photopolymers, reflection and transmission holograms, refractive index modulation
Abstract
Modified holographic photopolymer materials developed at NIOCH SB RAS, which, as a result of post-processing, provide high diffraction efficiency with a small thickness of the recording layer, have been studied by the method of recording reflection and transmission volume elementary holograms. Samples of volume reflection holograms with a diffraction efficiency of about 90% are obtained with a recording layer thickness of about 6 μm and refractive index modulation ∆n of no less than 0.036. The obtained holograms have high transparency in the entire visible range of the spectrum, low shrinkage, and good uniformity of the spatial structure of the grating, as evidenced by a clear picture of the side lobes of the spectral response contour.
|
