Holographic data storage
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Collinear holographic data storage technologies Open
In the era of information explosion, the demand of data storage is increased dramatically. Holographic data storage technology is one of the most promising next-generation data storage technologies due to its high storage density, fast dat…
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Volume holographic recording in Irgacure 784-doped PMMA photopolymer Open
Photoinitiator plays a crucial role on photopolymer. Unlike photoinitiator phenanthrenequinone (PQ), the solubility of Irgacure 784 dissolved in MMA is very high. In this paper, we use Irgacure 784 as photoinitiator doped in poly(methyl me…
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A Review of Hologram Storage and Self-Written Waveguides Formation in Photopolymer Media Open
Photopolymer materials have received a great deal of attention because they are inexpensive, self-processing materials that are extremely versatile, offering many advantages over more traditional materials. To achieve their full potential,…
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Phase modulated high density collinear holographic data storage system with phase-retrieval reference beam locking and orthogonal reference encoding Open
A novel phase modulation method for holographic data storage with phase-retrieval reference beam locking is proposed and incorporated into an amplitude-encoding collinear holographic storage system. Unlike the conventional phase retrieval …
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Lensless complex amplitude demodulation based on deep learning in holographic data storage Open
To increase the storage capacity in holographic data storage (HDS), the information to be stored is encoded into a complex amplitude. Fast and accurate retrieval of amplitude and phase from the reconstructed beam is necessary during data r…
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Rewritable three-dimensional holographic data storage <i>via</i> optical forces Open
The development of nanostructures that can be reversibly arranged and assembled into 3D patterns may enable optical tunability. However, current dynamic recording materials such as photorefractive polymers cannot be used to store informati…
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Multilevel recording of complex amplitude data pages in a holographic data storage system using digital holography Open
A holographic data storage system using digital holography is proposed to record and retrieve multilevel complex amplitude data pages. Digital holographic techniques are capable of modulating and detecting complex amplitude distribution us…
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Highly Sensitive Photopolymer for Holographic Data Storage Containing Methacryl Polyhedral Oligomeric Silsesquioxane Open
Herein, via introducing eight methacryl polyhedral oligomeric silsesquioxane (Ma-POSS), we dramatically enhance the holographic performance of phenanthraquinone-doped poly(methyl methacrylate) (PQ/PMMA) photopolymer with excellent characte…
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Design concepts for diffusive holographic photopolymers Open
Diffusive photopolymers are an area of intense recent materials development, spurred by interest in holographic data storage, display holography, and custom diffractive optical elements, among other applications. This review examines a ran…
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Fast non-interferometric iterative phase retrieval for holographic data storage Open
Fast non-interferometric phase retrieval is a very important technique for phase-encoded holographic data storage and other phase based applications due to its advantage of easy implementation, simple system setup, and robust noise toleran…
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Single Cell Analysis of Stored Red Blood Cells Using Ultra-High Throughput Holographic Cytometry Open
Holographic cytometry is introduced as an ultra-high throughput implementation of quantitative phase imaging of single cells flowing through parallel microfluidic channels. Here, the approach was applied for characterizing the morphology o…
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Holographic-Inspired Meta-Surfaces Exploiting Vortex Beams for Low-Interference Multipair IoT Communications: From Theory to Prototype Open
Meta-surfaces, also known as Reconfigurable Intelligent Surfaces (RIS), have emerged as a cost-effective, low power consumption, and flexible solution for enabling multiple applications in Internet of Things (IoT). However, in the context …
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Orthogonal polarization encoding for reduction of interpixel cross talk in holographic data storage Open
Interpixel cross talk decreases the quality of a reconstructed signal in holographic data storage and imposes a limitation on its storage capacity. To reduce the interpixel cross talk, an orthogonal polarization encoding method is proposed…
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Ultrafast volume holographic storage on PQ/PMMA photopolymers with nanosecond pulsed exposures Open
Ultrafast holographic recording in bulk phenanthrenequinone dispersed poly (methyl methacrylate) photopolymers is experimentally examined under nanosecond pulsed exposure. A modified interference optical system is set to investigate the da…
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Exploring binary and ternary modulations on a PA-LCoS device for holographic data storage in a PVA/AA photopolymer Open
We focus on the novelty of three elements in holographic data storage systems (HDSS): the data pager, where we introduce a parallel-aligned liquid crystal on silicon (PA-LCoS) microdisplay; the recording material, where we consider the hig…
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Highly sensitive photopolymer for holographic data storage Open
The insufficient photosensitivity of conventional organic recording materials such as phenanthraquinone-doped poly(methyl methacrylate) (PQ/PMMA) significantly limits the recording speed in holographic data storage. Accelerating the format…
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Detection method for the complex amplitude of a signal beam with intensity and phase modulation using the transport of intensity equation for holographic data storage Open
Holographic data storage (HDS), in which both the amplitude and the phase of a signal beam are modulated, has been extensively studied with the goal of increasing its storage capacity. To detect such modulation during data retrieval, it is…
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SiO2 NPs-PQ/PMMA Photopolymer Material Doped with a High-Concentration Photosensitizer for Holographic Storage Open
Dispersing nanoparticles and increasing the photosensitizer concentration have been regarded as effective approaches for improving the performance of a holographic storage material. In this paper, SiO2 nanoparticle (NP)-dispersed PQ/PMMA n…
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Frequency expanded non-interferometric phase retrieval for holographic data storage Open
A novel frequency expanded non-interferometric phase retrieval method for holographic data storage is proposed. The limitation of twice Nyquist frequency for phase retrieval with high fidelity is broken through. Only 1 times Nyquist size f…
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Multidimensional‐Encrypted Meta‐Optics Storage Empowered by Diffraction‐Order Decoupling Open
Recent advancements in multidimensional multiplexing have paved the way for meta‐optics encryption to be a viable solution to next‐generation information storage and encryption security. However, challenges persist in increasing simultaneo…
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Cavity-enhanced eigenmode and angular hybrid multiplexing in holographic data storage systems Open
Resonant optical cavities have been demonstrated to improve energy efficiencies in Holographic Data Storage Systems (HDSS). The orthogonal reference beams supported as cavity eigenmodes can provide another multiplexing degree of freedom to…
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LED-Cured Reflection Gratings Stored in an Acrylate-Based Photopolymer Open
The storage of volume holographic reflection gratings in low-toxicity photopolymers represents a challenge at present since they can be used in many important applications such as biosensors and holographic optical elements. In this contex…
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Reprogrammable optical metasurfaces by electromechanical reconfiguration Open
Metasurfaces, with artificially designed ultrathin and compact optical elements, enable versatile manipulation of the amplitude, phase, and polarization of light waves. While most of the metasurfaces are static and passive, here we propose…
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Collinear non-interferometric phase retrieval for holographic data storage Open
A collinear non-interferometric phase retrieval method for holographic data storage is proposed. The code rate of the collinear system can be increased by 2 times due to transferring the 50% embedded data from a signal beam to a reference …
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Holographically encoded volume phase masks Open
We present here a method to create spectrally addressable phase masks by encoding phase profiles into volume Bragg gratings, allowing these holographic elements to be used as phase masks at any wavelength capable of satisfying the Bragg co…
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Dynamic sampling iterative phase retrieval for holographic data storage Open
A dynamic sampling iterative phase retrieval method, which dynamically samples the Fourier intensity distribution of the reconstruction beam captured by the detector, is proposed to shorten the iterative number and decrease the phase error…
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Phenanthraquinone-Doped Polymethyl Methacrylate Photopolymer for Holographic Recording Open
Phenanthraquinone-doped polymethyl methacrylate (PQ/PMMA) photopolymers are considered to be the most promising holographic storage media due to their unique properties, such as high stability, a simple preparation process, low price, and …
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Digital super-resolution holographic data storage based on Hermitian symmetry for achieving high areal density Open
Digital super-resolution holographic data storage based on Hermitian symmetry is proposed to store digital data in a tiny area of a medium. In general, reducing a recording area with an aperture leads to the improvement in the storage capa…
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Bi-photonic reduction of anisotropic Ag nanoparticles for color-tunable hologram reconstruction Open
Efficient optical phase modulation is essential for information processing. The polarization response of metallic nanoparticles plays a key role in the formation of vector hologram. Commonly, Ag nanoparticles reduced by incoherent UV lamp …
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Cavity techniques for holographic data storage recording Open
Conventionally, reading and writing of data holograms utilizes a fraction of the light power because of a trade off in write and read efficiencies. This system constraint can be mitigated by applying a resonator cavity. Cavities enable mor…