The Experts below are selected from a list of 53757 Experts worldwide ranked by ideXlab platform
Takahiro Ishinabe - One of the best experts on this subject based on the ideXlab platform.
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vertical field switching for blue phase liquid crystal devices
Applied Physics Letters, 2011Co-Authors: Hui Chuan Cheng, Jin Yan, Takahiro IshinabeAbstract:A low-voltage ( 80%), submillisecond-response, and hysteresis-free polymer-stabilized blue-phase liquid crystal (BPLC) device with vertical field switching (VFS) and oblique incident light are demonstrated experimentally. Unlike the commonly employed in-plane switching in which the electric field is primarily in Lateral Direction and not uniform spatially, the VFS mode has uniform longitudinal field. As a result, the operating voltage is reduced by ∼ 3.2 × which in turn helps to eliminate hysteresis. The VFS mode is a promising candidate for the emerging BPLC display and photonic devices.
Yanqing Lu - One of the best experts on this subject based on the ideXlab platform.
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fast switchable optical vortex generator based on blue phase liquid crystal fork grating
Optical Materials Express, 2014Co-Authors: Shijun Ge, Wei Ji, Wei Hu, Yanqing LuAbstract:Optical vortices have great potentials in optical communications, quantum computations, micro-manipulations and so on. At present, fast switching and reconfiguring of these beam vortices are still challenges. We proposed a blue phase liquid crystal fork grating by applying a vertical electric field with a forked electrode to the polymer stabilized blue phase liquid crystal cell. A fork shaped phase profile with alternation of isotropic and ordinary refractive indices in the Lateral Direction is thus obtained. Both fork gratings and fork grating array with different topological charges are demonstrated. They permit rapid optical vortex switching and topological charge tuning, and also exhibit excellent polarization independency and high efficiency.
Yağmurlu F. - One of the best experts on this subject based on the ideXlab platform.
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Depositional features and coal potential of the Gölbaşı- Bahçeköy Neogene Basin, Ankara (Central Turkey)
'Springer Science and Business Media LLC', 2019Co-Authors: Şentürk M., Tagliasacchi E., Yağmurlu F.Abstract:The Bahçeköy coal field, which is the subject of this study, is located in the Gölbaşı Neogene basin in the south of Ankara (central Turkey). The pre-Neogene basement rocks located in the west and south of the basin are mostly composed of Permo-Triassic carbonate rocks, Cretaceous ophiolites, and Eocene turbidites. The coals in the Bahçeköy area are observed in the lower part of the Pliocene lacustrine sedimentary sequence which fills the basin. In the western part of the basin, the basalts and the lacustrine sediments, which contain coal, show intrusive contact relations in the Lateral Direction, during the Pliocene period, with the effect of the volcanism developing at the same time with sedimentation. Diatomite intercalations were formed at the upper parts of the lacustrine sequence which reached 12 m. The widespread observation of diatomites is quite important and it implies that the silicon-rich solutions associated with volcanism are involved in the lacustrine environment. The thickness of the economic coal level in Bahçeköy area varies between 4 and 12 m. According to these thicknesses, the total coal reserves calculated for the Bahçeköy area reach up to 16 million tons. The obtained drilling data shows that Bahçeköy coals exhibit rapid thickness and quality changes in the Lateral Direction. The chemical analyses point out these coals have average calorific value ranging from 7762 to 12,413 kJ/kg and ash content ranging from 44 to 65%. © 2019, Saudi Society for Geosciences
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Neogene Basin, Ankara (Central Turkey)
'Springer Science and Business Media LLC', 2019Co-Authors: Şentürk M., Tagliasacchi E., Yağmurlu F.Abstract:The Bahcekoy coal field, which is the subject of this study, is located in the Golbasi Neogene basin in the south of Ankara (central Turkey). The pre-Neogene basement rocks located in the west and south of the basin are mostly composed of Permo-Triassic carbonate rocks, Cretaceous ophiolites, and Eocene turbidites. The coals in the Bahcekoy area are observed in the lower part of the Pliocene lacustrine sedimentary sequence which fills the basin. In the western part of the basin, the basalts and the lacustrine sediments, which contain coal, show intrusive contact relations in the Lateral Direction, during the Pliocene period, with the effect of the volcanism developing at the same time with sedimentation. Diatomite intercalations were formed at the upper parts of the lacustrine sequence which reached 12 m. The widespread observation of diatomites is quite important and it implies that the silicon-rich solutions associated with volcanism are involved in the lacustrine environment. The thickness of the economic coal level in Bahcekoy area varies between 4 and 12 m. According to these thicknesses, the total coal reserves calculated for the Bahcekoy area reach up to 16 million tons. The obtained drilling data shows that Bahcekoy coals exhibit rapid thickness and quality changes in the Lateral Direction. The chemical analyses point out these coals have average calorific value ranging from 7762 to 12,413 kJ/kg and ash content ranging from 44 to 65%.C1 [Senturk, Murat; Yagmurlu, Fuzuli] Suleyman Demirel Univ, Geol Engn Dept, Cunur Isparta, Turkey.[Tagliasacchi, Ezher] Pamukkale Univ, Geol Engn Dept, TR-20070 Denizli, Turkey
Hui Chuan Cheng - One of the best experts on this subject based on the ideXlab platform.
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vertical field switching for blue phase liquid crystal devices
Applied Physics Letters, 2011Co-Authors: Hui Chuan Cheng, Jin Yan, Takahiro IshinabeAbstract:A low-voltage ( 80%), submillisecond-response, and hysteresis-free polymer-stabilized blue-phase liquid crystal (BPLC) device with vertical field switching (VFS) and oblique incident light are demonstrated experimentally. Unlike the commonly employed in-plane switching in which the electric field is primarily in Lateral Direction and not uniform spatially, the VFS mode has uniform longitudinal field. As a result, the operating voltage is reduced by ∼ 3.2 × which in turn helps to eliminate hysteresis. The VFS mode is a promising candidate for the emerging BPLC display and photonic devices.
Shijun Ge - One of the best experts on this subject based on the ideXlab platform.
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fast switchable optical vortex generator based on blue phase liquid crystal fork grating
Optical Materials Express, 2014Co-Authors: Shijun Ge, Wei Ji, Wei Hu, Yanqing LuAbstract:Optical vortices have great potentials in optical communications, quantum computations, micro-manipulations and so on. At present, fast switching and reconfiguring of these beam vortices are still challenges. We proposed a blue phase liquid crystal fork grating by applying a vertical electric field with a forked electrode to the polymer stabilized blue phase liquid crystal cell. A fork shaped phase profile with alternation of isotropic and ordinary refractive indices in the Lateral Direction is thus obtained. Both fork gratings and fork grating array with different topological charges are demonstrated. They permit rapid optical vortex switching and topological charge tuning, and also exhibit excellent polarization independency and high efficiency.
