Fully updatable three-dimensional holographic stereogram display device based on organic monolithic compound

Tsutsumi, Naoto; Kinashi, Kenji; Tada, Kunio; Fukuzawa, Kodai; Kawabe, Yutaka

doi:10.1364/oe.21.019880

Cited by 30 publications

(28 citation statements)

References 8 publications

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“…124 The hologram had a brightness of 2500 cd m − 2 , reduced laser power of 20 mW CW laser, and reported an improvement in resolution and a three-color hologram. 125 Tsutsumi et al [126][127][128] at the Kyoto Institute of Technology, Japan, also demonstrated the development of an updatable 3D hologram and holographic stereogram images using a monolithic compound containing carbazole-azobenzene without a bias-field. In the updatable 3D holographic stereogram display device, 50-100 elemental holograms (hogels) were recorded every 300 ms on a device made of a monolithic compound using a green laser; the recorded 3D holographic stereogram was reconstructed using a yellow-orange or red laser.…”

Section: Pr Response In a Centrosymmetric Environmentmentioning

confidence: 99%

“…In the updatable 3D holographic stereogram display device, 50-100 elemental holograms (hogels) were recorded every 300 ms on a device made of a monolithic compound using a green laser; the recorded 3D holographic stereogram was reconstructed using a yellow-orange or red laser. 127 Recording and reconstruction of the hologram were operated using a software called Holographic Stereogram, KIT (Kyoto Institute of Technology, Kyoto, Japan). 127 The authors also reconstructed an updatable hologram of a coin and a 2D hologram of an object image from a special light modulator using a PVK-based PR polymer composite of PVK/7-DCST/CzEPA/TNF (44/35/20/1 by wt.).…”

Section: Pr Response In a Centrosymmetric Environmentmentioning

confidence: 99%

“…127 Recording and reconstruction of the hologram were operated using a software called Holographic Stereogram, KIT (Kyoto Institute of Technology, Kyoto, Japan). 127 The authors also reconstructed an updatable hologram of a coin and a 2D hologram of an object image from a special light modulator using a PVK-based PR polymer composite of PVK/7-DCST/CzEPA/TNF (44/35/20/1 by wt.). 91 Using the same PR polymer device, they reconstructed a dynamic 2D hologram with an object image that was supplied from a spatial light modulator at a refresh time of 1 s using the same PVK PR device, 129 and a 50 ms response time using a PDAS-based PR composite of PDAS/FDSCT/ECZ/PCBM (44/35/20/1 by wt.).…”

Section: Pr Response In a Centrosymmetric Environmentmentioning

confidence: 99%

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Molecular design of photorefractive polymers

Tsutsumi

2016

Polym J

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This review article describes the current state-of-the-art research on organic photorefractive polymer composites. A historical background on photorefractive materials is first introduced and is followed by a discussion on the opto-physical aspects and the mechanism of photorefractivity. The molecular design of photorefractive polymers and organic compounds is discussed, followed by a discussion on optical applications of the photorefractive polymers. Polymer Journal (2016) 48, 571-588; doi:10.1038/pj.2015.131; published online 27 January 2016 BACKGROUND In this report, the molecular design of organic photorefractive (PR) polymers is reviewed. Organic PR polymers are materials that possess both electro-optical and photoconductive properties. Research on photoconductive polymers, whose pioneering polymer is poly(N-vinyl carbazole) (PVK, PVCz), began in the 1960s. From the 1980s, research on organic nonlinear optical (NLO) materials has been widely conducted in the fields of organic electro-optics and optical nonlinearity. From the 1990s, new technology using organic photorefractivity combined with photoconductive and electro-optical properties was introduced in the field of organic semiconducting materials, 1 and organic light-emitting diodes 2-6 and organic fieldeffect transistors 7 were also debuted in this field. At the same time, the interest of researchers also turned toward the development of organic photovoltaic cells and organic solar cells. [8][9][10][11] The transport of charge carriers through photoconductive manifolds is a common phenomenon found in PR, organic light-emitting diode or organic photovoltaic materials. Thus, the development of materials in each field is expected to merge together to trigger the development of novel materials.The PR effect is a well-known phenomenon that is observed in materials in which refractive index modulation is induced by the space-charge field that results from the redistribution of positive and negative charge carriers separated through photo-excitation. 12 This phenomenon was first reported in inorganic crystals of lithium niobate (LiNbO 3 ) and lithium tantalate (LiTaO 3 ) and was observed through heterogeneous optically induced refractive indices in 1966. 13 Since then, the PR effect has extensively been investigated in many inorganic crystals, and theoretical approaches have been established to explain this phenomenon. 14 In 1991, 1 the first study of PR polymers reported a low diffraction efficiency of 10 −3 to 1% and a small optical gain of 0.33 cm À1 . In 1994, 15 a high diffraction efficiency of 86% (the remaining 14% was attributed to optical losses) and a large optical gain exceeding 200 cm À1 was reported in photoconductive PVK-based PR composites. Over the past two decades, many featured review articles [16][17][18][19][20][21][22][23][24][25][26][27] and book

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Section: Pr Response In a Centrosymmetric Environmentmentioning

confidence: 99%

Section: Pr Response In a Centrosymmetric Environmentmentioning

confidence: 99%

Section: Pr Response In a Centrosymmetric Environmentmentioning

confidence: 99%

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Molecular design of photorefractive polymers

Tsutsumi

2016

Polym J

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“…Since the most fascinating application of updatable holographic 3D displays has been demonstrated, many photorefractive materials, including polymers, composites and liquid crystals, have been investigated to realize real-time dynamic 3D hologram displays [6][7][8][9][10]. However, some disadvantages, such as low stability and the need of high electric fields to obtain excellent photorefraction properties, limit their practical applications [4,5,9,10].…”

Section: Introductionmentioning

confidence: 99%

Improvement in the Photorefractive Response Speed and Mechanism of Pure Congruent Lithium Niobate Crystals by Increasing the Polarization Current

et al. 2017

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A series of pure congruent lithium niobate (LiNbO 3 , CLN) crystals were grown and directly polarized under different electric currents in the growth furnace. Their holographic properties were investigated from the ultraviolet to the visible range. The response time shortened, whereas the diffraction efficiency increased incrementally with the electric current. In particular, the response time of CLN polarized under 100 mA can be reduced by a factor of 10 with a still high saturation diffraction efficiency of about 40.8% at 351 nm. Moreover, its response speed improved by 60 times and 10 times for 473 and 532 nm laser, respectively. The light erasing behavior implies that at least two kinds of photorefractive centers exist in the crystals. Increasing the polarization current induces two pronounced UV absorption peaks and a wide visible absorption peak in CLN crystals. The diffusion effect dominates the photorefractive process and electrons are the dominant carriers. The possible mechanism for the fast photorefractive response is discussed. Increasing the polarization electric current is an effective method to improve the photorefractive response of LN crystal.

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“…Recently, azo-carbazole compounds have been studied also due to their high performance as rewritable holographic/stereographic 3D displays in the form of the polymer films containing the highly concentrated dyes [4][5][6][7][8]. It is necessary to elaborate the precise grating formation and erasure processes in order to realize efficient holographic system.…”

Section: Introductionmentioning

confidence: 99%

Optically Inscribed Grating in Azo-Carbazole Dye: Concentration Dependence

Matsuoka

Tada

Yoshikawa

et al. 2015

e-J. Surf. Sci. Nanotech.

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Investigation for the operation mechanism in writing and reading processes are necessary in order to realize practical 3D devices with azo-carbazole dyes which are promising candidates for real-time 3D displays. We made dynamical studies of four-wave mixing and two-beam coupling for dyes 3-[(4-nitrophenyl)azo]-9H-calbazole-9-ethanol (NACzEtOH) and Disperse Red (DR1) doped in a polymer and investigated their dependence on dye concentration. Results indicated the important roles of birefringence on the holographic response and stable but erasable characteristics of the gratings in the azo-carbazole.

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Fully updatable three-dimensional holographic stereogram display device based on organic monolithic compound

Cited by 30 publications

References 8 publications

Molecular design of photorefractive polymers

Molecular design of photorefractive polymers

Improvement in the Photorefractive Response Speed and Mechanism of Pure Congruent Lithium Niobate Crystals by Increasing the Polarization Current

Optically Inscribed Grating in Azo-Carbazole Dye: Concentration Dependence

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