Fabrication and performance of efficient thin circular polarization gratings with Bragg properties using bulk photo-alignment of a liquid crystalline polymer

Sakhno, Oksana; Gritsai, Yuri; Sahm, Hagen; Stumpe, Joachim

doi:10.1007/s00340-018-6920-2

Cited by 20 publications

(15 citation statements)

References 17 publications

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“…7 (a), For the simulation ne=1.7, no=1.55, and the was thickness 0.53 microns. The fabrication could be done using a 3D holographic alignment method that we have previously discussed [12,13]. The on axis performance of the compensator to convert linear polarized light to circular polarized light is verified by FDTD simulation [8] seen in Fig.…”

Section: Compensator Design To Use Linear Polarized Light In Waveguidementioning

confidence: 94%

“…1 (b), the LC director rotation plane could be slanted to the x-z plane, in which the Bragg plane (red dash line) is perpendicular to the LC rotation plane (green dash line). This [12,13] with volume exposure method but not been extensively studied yet.…”

Section: Polarization State In Input/output Couplers (T-pvh)mentioning

confidence: 99%

“…We used the two-beam interference method [12] with the photopolymer PMCB6M [15,16] to fabricate the Slanted T-PVH (B-θ/D-θ+90). As reported by Nobuhiro Kawatsuki et al, PMCB6M could polymerize and align side chain with birefringence group along with the polarization direction of linearly polarized exposure beam.…”

Section: Experiments Validationsmentioning

confidence: 99%

“…Recently a new structure of T-PVH as shown in Fig. 1 (b) was reported which could be fabricated by the volume exposure technology [12,13]. This structure has not been extensively studied yet especially for the polarization state output with large diffraction angle.…”

Section: Introductionmentioning

confidence: 99%

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30‐3: Student Paper: Polarization State Exploration and Management in Waveguide Display with Polarization Volume Gratings

Feng

Lee

et al. 2021

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In this work, we focus on the polarization state input, propagation and output of waveguide display device using polarization volume holographic gratings (PVH) as couplers. First, a detailed study of the transmissive PVH (T‐PVH) is presented in terms of diffraction efficiency, polarization selectivity and polarization output, which is expected to be used as the waveguide input/output couplers. The configuration here called “Slanted T‐PVH” has the advantageous property of maintaining orthogonal circular output polarization states. Then, the polarization state management of light propagating in waveguide is considered. The issue that the polarization state of the light can change as it propagates in the waveguide due to total internal reflection (TIR) is made clear, that has a negative effect on the waveguide PVH input/output couplers efficiency, image uniformity, and the polarization multiplexing capability. Finally, it is shown that applying compensators to correct the polarization state change can solve the polarization state change in a waveguide.

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Section: Compensator Design To Use Linear Polarized Light In Waveguidementioning

confidence: 94%

Section: Polarization State In Input/output Couplers (T-pvh)mentioning

confidence: 99%

Section: Experiments Validationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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30‐3: Student Paper: Polarization State Exploration and Management in Waveguide Display with Polarization Volume Gratings

Feng

Lee

et al. 2021

Symp Digest of Tech Papers

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“…Besides HPDLC, the recently-developed LC polarization volume gratings (PVGs) are more attractive, due to their near-100% diffraction efficiency [42,[85][86][87][88][89][90]. Figure 13a illustrates the LC director distribution of a reflective PVG [85].…”

Section: Lc Volume Gratingsmentioning

confidence: 99%

Liquid Crystal Beam Steering Devices: Principles, Recent Advances, and Future Developments

et al. 2019

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Continuous, wide field-of-view, high-efficiency, and fast-response beam steering devices are desirable in a plethora of applications. Liquid crystals (LCs)-soft, bi-refringent, and self-assembled materials which respond to various external stimuli-are especially promising for fulfilling these demands. In this paper, we review recent advances in LC beam steering devices. We first describe the general operation principles of LC beam steering techniques. Next, we delve into different kinds of beam steering devices, compare their pros and cons, and propose a new LC-cladding waveguide beam steerer using resistive electrodes and present our simulation results. Finally, two future development challenges are addressed: Fast response time for mid-wave infrared (MWIR) beam steering, and device hybridization for large-angle, high-efficiency, and continuous beam steering. To achieve fast response times for MWIR beam steering using a transmission-type optical phased array, we develop a low-loss polymer-network liquid crystal and characterize its electro-optical properties.

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Holographic Optical Elements for Augmented Reality: Principles, Present Status, and Future Perspectives

Xiong

Yin

Li³

et al. 2020

Advanced Photonics Research

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Holographic optical elements (HOEs) exhibit several unique properties in arbitrary wavefront recording and extraction. Versatile recording mechanisms and material availabilities further expand their design flexibilities. Augmented reality (AR) displays are emerging and transforming daily life. Applications of HOEs in AR have harvested numerous fruitful evolutionary and revolutionary progresses. Herein, the basic operation principles of HOEs are elucidated, recent advances in AR systems are reviewed, and their future perspectives are discussed.

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Fabrication and performance of efficient thin circular polarization gratings with Bragg properties using bulk photo-alignment of a liquid crystalline polymer

Cited by 20 publications

References 17 publications

30‐3: Student Paper: Polarization State Exploration and Management in Waveguide Display with Polarization Volume Gratings

30‐3: Student Paper: Polarization State Exploration and Management in Waveguide Display with Polarization Volume Gratings

Liquid Crystal Beam Steering Devices: Principles, Recent Advances, and Future Developments

Holographic Optical Elements for Augmented Reality: Principles, Present Status, and Future Perspectives

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