Abstract:Three different blends containing side-chain azobenzene polyesters and poly(methyl methacrylate) homopolymers have been prepared for recording volume holographic polarization gratings using 488 nm light pulses. The final azo content in the blends has been decreased down to 0.2 wt. %, and their morphologies have been investigated by transmission electron microscopy. Stable and rewritable polarization gratings have been recorded, and 20 gratings have been multiplexed using 2 ms pulses of low energy (4 mJ/cm 2). … Show more
“…Thick fi lms of this material displayed good optical quality, and stable volume holograms were multiplexed by using low energy light pulses and reducing the duration to 2 ms (Berges et al, 2013b).…”
Section: Photoinduced Response Of Azobenzene Polymersmentioning
“…Thick fi lms of this material displayed good optical quality, and stable volume holograms were multiplexed by using low energy light pulses and reducing the duration to 2 ms (Berges et al, 2013b).…”
Section: Photoinduced Response Of Azobenzene Polymersmentioning
“…На одном участке слоя реги-стрировалось до 20 поляризационных голограмм. Сни-жение длительности импульса до 2 ms приводило к повышению светочувствительности слоев азополисти-рольных полимеров до 4 mJ/cm 2 и возрастанию вели-чины ДЭ до 0.005% [129]. При этом было обнару-жено, что ДЭ голограмм и их термическая стабиль-ность зависят от предварительного облучения слоя излучением с λ = 488 nm, интенсивности считываю-щего излучения с λ = 633 nm и промежутка време-ни между окончанием предварительного облучения и воздействием импульсного регистрирующего излучения.…”
Section: обратимые светочувствительные среды 31 фотохромные полимерunclassified
“…9,10 High diffraction efficiency and low selection angle of recorded gratings are favored to achieve holograms multiplexing in ultrafast holography. 11 Zhao et al investigated the holographic performances of an acrylamide/polyvinyl alcohol (AA/PVA) photopolymer with different Eosin Y concentration under 8 ns single-pulse holographic exposure. The diffraction efficiency of gratings reached 2.1%, but the selection angle was broad (1.35°).…”
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