Deformed-helix ferroelectric liquid-crystal spatial light modulator that demonstrates high diffraction efficiency and 370-line pairs/mm resolution

Wick, David V.; Martínez, Ty; Wood, Mitchell; Wilkes, James M.; Gruneisen, Mark T.; Berenberg, Vladimir A.; Vasil'ev, Michael V.; Onokhov, A. P.; Beresnev, L. A.

doi:10.1364/ao.38.003798

Cited by 21 publications

(8 citation statements)

References 9 publications

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“…With the help of a C-doped a-Si:H film, the OASLM resolution was further improved to 370 lp mm 21 with a peak DE of 8%. 8 In this case, the modulation transfer function at 50%, generally considered an indication of the spatial resolution of the device, was measured to be ,225 lp mm 21 .…”

Section: Introductionmentioning

confidence: 94%

A high-resolution optically addressed spatial light modulator based on ZnO nanoparticles

2015

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An optically addressed spatial light modulator (OASLM) can modulate the wavefront of a read light by displaying a phase pattern or a hologram configured by the intensity distribution of a write light. Using ZnO nanoparticles (NPs) as a novel photoconductor, a high-resolution OASLM was fabricated. A ZnO NP suspension was spin-coated on an indium tin oxide (ITO)-coated glass substrate and annealed to form a photosensitive layer. The device was characterized electrically and optically. The device was operated at low driving voltages in the transmission mode. Updatable recording of a diffraction grating up to 825 lp mm 21 with a diffraction efficiency (DE) of 0.05% and binary holograms with pixel sizes from 2 mm down to 0.72 mm were demonstrated using a 405 nm wavelength write laser and a 635 nm wavelength read laser.

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Section: Introductionmentioning

confidence: 94%

A high-resolution optically addressed spatial light modulator based on ZnO nanoparticles

2015

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“…[182] Beam steering with two ferroelectric SLMs has been reported about the same time. [189] The development of SmC* gratings took a step forward with the introduction of polymer stabilization. [184] The mixture was filled into a 4 µm, planar rubbed cell and a setup to simultaneously apply DC voltage, probe the diffracted beam and two interfering continuous wave laser (pump) at 514.5 nm was built.…”

Section: Chiral Smectic C Lcsmentioning

confidence: 99%

Dynamic Control of Light Direction Enabled by Stimuli‐Responsive Liquid Crystal Gratings

et al. 2018

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the duality consolidation, the idea of controlling light and how it interacts with matter has always been an exciting topic. Visible light, as we perceive it, is a small portion of the electromagnetic spectrum composed of mutually perpendicular oscillating electric and magnetic fields that propagate through space and presents wave-like and particle-like behavior. Since the elements comprising matter possess dynamic electron clouds, the electromagnetic nature of light prompts different responses when it interacts with different materials, depending on its intensity, frequency, the arrangement of molecules, and so on. Whenever light interacts with matter, it might be absorbed, re-emitted, scattered, or transmitted. Although these effects are well known, the combination of them with new, innovative materials pushes optics forward. In fact, advances in optics have often occurred through the development of materials with improved optical properties, thus creating remarkable applications that tremendously influence our daily lives. These exciting applications include image processing and recording, lasing, data storage, display devices, detector systems, propulsion systems, and optical tweezers, which have enabled remote micromanipulation of colloidal particles and promising applications in various biomedical and biological applications. [1][2][3] There is, however, one component that stands out: the diffraction grating. It is generally regarded as one of the most important devices in the development of several fields of science. [4] Such importance comes from the fact that a diffraction grating is a device with a periodic structure capable of changing the propagation and splitting the spectrum The ability to control light direction with tailored precision via facile means is long-desired in science and industry. With the advances in optics, a periodic structure called diffraction grating gains prominence and renders a more flexible control over light propagation when compared to prisms. Today, diffraction gratings are common components in wavelength division multiplexing devices, monochromators, lasers, spectrometers, media storage, beam steering, and many other applications. Next-generation optical devices, however, demand nonmechanical, full and remote control, besides generating higher than 1D diffraction patterns with as few optical elements as possible. Liquid crystals (LCs) are great candidates for light control since they can form various patterns under different stimuli, including periodic structures capable of behaving as diffraction gratings. The characteristics of such gratings depend on several physical properties of the LCs such as film thickness, periodicity, and molecular orientation, all resulting from the internal constraints of the sample, and all of these are easily controllable. In this review, the authors summarize the research and development on stimuli-controllable diffraction gratings and beam steering using LCs as the active optical materials. Dynamic gratings fabricated by applying external f...

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“…In reality, due to the inevitable light loss in the modulator elements, the diffraction efficiency is even lower. This is a drawback of the direct method for holographic corrector recording, which was used in [4][5][6][7]. This drawback can be overcome by sophisticating the corrector recording schemes [8,9], as a result of which dynamic holographic gratings with an asymmetric fringe profile can be recorded.…”

Section: Introduction Thin Dynamic Holograms With An Asymmetric Frinmentioning

confidence: 99%

10.1007/s11449-008-2024-7

2010

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Deformed-helix ferroelectric liquid-crystal spatial light modulator that demonstrates high diffraction efficiency and 370-line pairs/mm resolution

Cited by 21 publications

References 9 publications

A high-resolution optically addressed spatial light modulator based on ZnO nanoparticles

A high-resolution optically addressed spatial light modulator based on ZnO nanoparticles

Dynamic Control of Light Direction Enabled by Stimuli‐Responsive Liquid Crystal Gratings

10.1007/s11449-008-2024-7

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