Optical reconfiguration by anisotropic diffraction in holographic polymer-dispersed liquid crystal memory

Ogiwara, Akifumi; Watanabe, Minoru

doi:10.1364/ao.51.005168

Cited by 13 publications

(3 citation statements)

References 27 publications

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“…The special characterization of HPDLCs is that the diffraction can be switched using external field because of the LC in the HPDLCs. HPDLCs are novel multi-function holographic optical elements (HOEs), which show promising prospects in the field of spatial light modulation [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Large angle beam steering using a slanted holographic polymer dispersed liquid crystal grating

Liu

Diao

et al. 2018

J. Phys. D: Appl. Phys.

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This paper reports 65° beam steering using a slanted holographic polymer dispersed liquid crystal (HPDLC) grating with the slanted angle at 16.6°. The HPDLC grating was fabricated using a convenient one-step holographic technique. The SEM image confirmed the slanted grating configuration. The grating showed anisotropic diffraction characterizations. The diffraction efficiency for the p-polarized light was as high as 80%. The Bragg angle deviation diffraction and the transmittance properties of the slanted HPDLC grating were investigated. The slanted HPDLC grating can be switched with an external electric field. The results in this work provide an optional method to fabricate a slanted grating configuration. The slanted HPDLC grating can be used in the field where polarized beam steering is required.

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Section: Introductionmentioning

confidence: 99%

Large angle beam steering using a slanted holographic polymer dispersed liquid crystal grating

Liu

Diao

et al. 2018

J. Phys. D: Appl. Phys.

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“…[24][25][26] The anisotropic volume grating in LC composites can have high diffraction efficiency depending on the incident polarization state of laser light, and the HPDLC memory demonstrated rigorous recording with high diffraction efficiency based on the polarization modulation technique. [27][28][29] We also discussed the formation of HPDLC memory by anglemultiplexing recording for an optically reconfigurable gate array under the control of the laser interference exposure at specified regions in LC composites. 30) Thus, the HPDLC memory formed by volume gratings has advantageous optical properties to advance configuration generation for optically reconfigurable gate arrays.…”

Section: Introductionmentioning

confidence: 99%

Effects of multi-context information recorded at different regions in holographic polymer-dispersed liquid crystal on optical reconfiguration

Ogiwara

Watanabe

2016

Jpn. J. Appl. Phys.

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A holographic polymer-dispersed liquid crystal (HPDLC) memory to record multi-context information for an optically reconfigurable gate array is formed by constructing a laser illumination system to implement successive laser exposures at different small regions in a glass cell filled with LC composites. The context pattern arrangements for circuit information are designed in a 3 × 3 in.2 photomask by electron beam lithography, and they are recorded as laser interference patterns at nine regions separated in an HPDLC sample by a laser interferometer composed of movable pinhole and photomask plates placed on motorized stages. The multi-context information reconstructed from the different regions in the HPDLC is written to a photodiode array in a gate-array VLSI by switching only the position of laser irradiation using the displacement of the pinhole plate under the control of a personal computer (PC). The effects of multi-context information recorded at different regions in the HPDLC on optical reconfiguration are discussed in terms of the optical system composed of ORGA VLSI and HPDLC memory. The internal structures in the HPDLC memory formed by multi-context recording are investigated by scanning electron microscopy (SEM) observation, and the configurations composed of LC and polymer phases are revealed at various regions in the HPDLC memory.

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“…The anisotropic volume grating can perform high diffraction efficiency depending on the incident polarization state of laser light. Thus, the novel characteristics of the HPDLC grating were applied for formation of the holographic memory to record image information by using the polarization modulation property of a spatial light modulator (SLM), and the HPDLC memory demonstrated rigorous recording with high diffraction efficiency based on the polarization modulation technique 16 . The HPDLC memory formed by volume gratings has advantageous optical properties to implement the anisotropic diffractions for a multi-context recording and thermal stability at high temperatures [17][18] .…”

Section: Introductionmentioning

confidence: 99%

Formation of holographic memory for optically reconfigurable gate array by angle-multiplexing recording of multi-circuit information in liquid crystal composites

et al. 2014

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A holographic polymer-dispersed liquid crystal (HPDLC) memory to record multi-context information for an optically reconfigurable gate array is formed by the angle-multiplexing recording using a successive laser exposure in liquid crystal (LC) composites. The laser illumination system is constructed using the half mirror and photomask written by the different configuration contexts placed on the motorized stages under the control of a personal computer. The fabricated holographic memory implements a precise reconstruction of configuration contexts corresponding to the various logical circuits such as OR circuit and NOR circuit by the laser illumination at different incident angle in the HPDLC memory.

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Optical reconfiguration by anisotropic diffraction in holographic polymer-dispersed liquid crystal memory

Cited by 13 publications

References 27 publications

Large angle beam steering using a slanted holographic polymer dispersed liquid crystal grating

Large angle beam steering using a slanted holographic polymer dispersed liquid crystal grating

Effects of multi-context information recorded at different regions in holographic polymer-dispersed liquid crystal on optical reconfiguration

Formation of holographic memory for optically reconfigurable gate array by angle-multiplexing recording of multi-circuit information in liquid crystal composites

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