Photorefractive response and real-time holographic application of a poly(4-(diphenylamino)benzyl acrylate)-based composite

Abstract

A photorefractive (PR) composite based on poly(4-(diphenylamino)benzyl acrylate) (PDAA) as a host photoconductive matrix is reported. The PR performance was investigated at three different wavelengths (532, 561, 594 nm), and an optimized operating wavelength of 532 nm was obtained. The PDAA composite had high sensitivity at 532 nm with a maximum diffraction efficiency of 480%, which was achieved at an applied electric field of 40 V lm À1 . An application with a hologram display system using the PR composite was demonstrated. A clear and updatable hologram of an object was successfully reconstructed in real time, even at a low applied electric field of 25 V lm À1 .

Molecular design of azo-carbazole monolithic dyes for updatable full-color holograms

“…[1][2][3][4][5] Examples of updatable holography include azobenzene molecules in polymer matrices, [6][7][8] liquid crystals, 9,10 polymeric liquid crystals [11][12][13][14][15] and photorefractive polymers. [16][17][18][19] In particular, azobenzene molecules are the most promising candidates for use in updatable holography because azobenzenes are well-known photosensitive chromophores that undergo trans-cis photoisomerization upon irradiation with light of an appropriate wavelength in a solution or in an appropriate host matrix. [20][21][22][23][24] The repetition of such photoisomerization within a host matrix leads to perpendicular alignment of the long axis of the azobenzene chromophore to the electric field vector of the linearly polarized light, which eventually induces anisotropy.…”

Современное Состояние Разработки Светочувствительных Сред Для Голографии (Обзор)

“…Регистрация и восстановление голограмм осуществля-лись в реальном времени, в том числе с использованием промежуточного динамического транспаранта. фотопроводящего полимера -поли (4-дифениламино) бензил акрилата LXVII, фенил-С 61 метилэфира бути-рильной кислоты LXVIII, используемого в качестве нелинейно-оптического хромофора и сенсибилизатора, и пластификатора-бензил-n-бутилфталата LXIX [180]. Слои ПВС, содержащие бихромат калия и гексагидрат хлорида никеля, позволяют записывать голограммы из-лучением лазера с длиной волны λ = 442 nm в реальном времени и не требуют дополнительной химической или термической обработки для получения голограмм [181].…”

Electron dominated grating in a triphenylamine-based photorefractive composite

“…1 Nowadays, p-type PR polymers and composites have become alternative materials owing to their low cost, ease in processability and ability to prepare large size devices. [8][9][10] The plasticizer is used to reduce the glass transition temperature, which is essential to improve the PR performance through orientational enhancement. the efficiency, optical gain and response time.…”