Traditional von Neumann computing architecture with separated computation and storage units has already impeded the data processing performance and energy efficiency, calling for emerging neuromorphic electronic and o...
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Traditional von Neumann computing architecture with separated computation and storage units has already impeded the data processing performance and energy efficiency, calling for emerging neuromorphic electronic and optical devices and systems which can mimic the human brain to shift this paradigm. Material-level innovation has become the key component to this revolution of information technology. Chalcogenide phase-change material (PCM) as a well-acknowledged data-storage medium is a promising candidate to tackle this challenge. In this review, the use of PCMs to implement artificial neurons and synapses from both the electronic and optical respects is discussed, and in particular, the structure-property physics and transition dynamics that enable such brain-inspired and in-memory computing applications are emphasized. Recent advances on the atomic-level amorphous and crystalline structures, transition mechanisms, materials optimization and design, neural and synaptic devices, brain-inspired chips, and computing systems, as well as the future opportunities of PCMs, are summarized and discussed.
We present the experimental realization of a compact and fully automized volume holographic memory based on phase-coded multiplexing that is capable of both, high-resolution analog image and digital datastorage, havi...
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Recent progress in the opticaldatastoragetechnology has created new R&D and manufacturing opportunities for the optical coating community. datastoragetechnology has so far been confined to the semiconductor a...
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ISBN:
(纸本)0819403849
Recent progress in the opticaldatastoragetechnology has created new R&D and manufacturing opportunities for the optical coating community. datastoragetechnology has so far been confined to the semiconductor and magnetics industry. The emergence of optical media for datastorage has opened up manufacturing potential for the optical coating industry which has largely been devoted to the manufacture of conventional coatings such as antireflection coatings, laser mirrors, optical filters and beam splitters. Multilayer coatings needed for opticalstorage media are within the scope of the manufacturing environment in a conventional optical coating plant with reasonable adaptations. Progress in the opticalstoragetechnology is generally reported in special topical meetings devoted to this technology. Therefore a survey of recent developments in this important field is considered appropriate for this conference devoted to new developments in thin film technology. In this review, we present the salient features, particularly the design aspects, of multilayer thin film storage media, and discuss recent developments in erasable phase change and magneto-opticalstorage media.
作者：
Ruan, HaoChinese Acad Sci
Shanghai Inst Opt & Fine Mech High Dens Opt Storage Lab Shanghai Peoples R China
In big data center, opticalstorage technologies have many advantages, such as energy saving and long lifetime. However, with the target of magnetic tape technology being 100TB/disc, how to improve the storage density...
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ISBN:
(纸本)9780960038008
In big data center, opticalstorage technologies have many advantages, such as energy saving and long lifetime. However, with the target of magnetic tape technology being 100TB/disc, how to improve the storage density of opticalstorage is still a huge challenge.
The results of a fresh look at holographic datastorage in photorefractive materials is reported. This work concludes that advances in photorefractive material, particularly SBN, AO deflector technology, CCD technolog...
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The results of a fresh look at holographic datastorage in photorefractive materials is reported. This work concludes that advances in photorefractive material, particularly SBN, AO deflector technology, CCD technology, and laser technology could make a very interesting low latency mass storage device possible. Two advances in this technology, a technique for a highly asymmetric write/read cycle and a method for building artificial crystal shcipes, are described.
This paper presents techniques developed at the Information technology Laboratory of the US National Institute of Standards and technology (NIST / ITL) for enabling microscopic image analysis of opticaldatastorage m...
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ISBN:
(纸本)081943292X
This paper presents techniques developed at the Information technology Laboratory of the US National Institute of Standards and technology (NIST / ITL) for enabling microscopic image analysis of opticaldatastorage media such as optical disks. These non-destructive techniques allow investigators to easily locate on the media a pre-existing series of media defects. These techniques can be applied to any type of optical disks including CDs and DVDs. The paper describes the experimental setup and the techniques utilized to achieve localization and registration of media defects. These techniques include data acquisition, computer control, auto focus, image processing, and remote control and observation. An extension of this setup utilizing available graphical programming environments can allow investigators at different locations to share and discuss the information on media defects by use of the Internet.
Zn ions were added into melts with 4.0mol.%, Fe ions were with 0.02mol.%, and In ions were with varying concentration of 0, 1.0, 2.0 and 3.0mol.%. A series of Zn:In:Fe:LiNbO3 Crystals were grown by Czochralski techniq...
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ISBN:
(纸本)0819455989
Zn ions were added into melts with 4.0mol.%, Fe ions were with 0.02mol.%, and In ions were with varying concentration of 0, 1.0, 2.0 and 3.0mol.%. A series of Zn:In:Fe:LiNbO3 Crystals were grown by Czochralski technique. Their absorption spectra and photo-damage resistant ability were measured. The mechanism of the shift of OH- absorption peak was investigated. Their photorefractive properties were experimentally investigated by using two-beam coupling. The results shown that, the photo-damage resistant ability of Zn(4mol.%):In(3mol.%): Fe(0.02mol.%):LiNbO3 Crystals were two orders than that of magnitude higher than that of Fe:LiNbO3 crystals, and with concentration of Zn and In ions increasing, diffraction efficiency and response time of crystals were shortened. The experiment of associative memory were also carried out with Zn(4mol.%):In(3mol.%):Fe(0.02mol.%):LiNbO3 crystals for the recording device and with Zn(4mol.%):In(2mol.%):Fe(0.02mol.%):LiNbO3 Crystals for phase conjugation.
Holographic datastorage is a new opticaltechnology which allows storing an important number of bits in a recording material. In this work, two different types of modulations, defocused binary intensity modulation an...
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ISBN:
(纸本)9780819486646
Holographic datastorage is a new opticaltechnology which allows storing an important number of bits in a recording material. In this work, two different types of modulations, defocused binary intensity modulation and phase modulation, are compared to obtain which modulation could be the most suitable for holographic datastorage. The best modulation would be the modulation with a homogeneous distribution of energy in the FT plane with no zero frequency peak.
The Center Aperture Detection (CAD) type Magnetically Induced Super-resolution (MSR) Magneto-optical Disk is one of method to overcome the limitation of optical resolution. For a reliability of the disk, it is importa...
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ISBN:
(纸本)0819455989
The Center Aperture Detection (CAD) type Magnetically Induced Super-resolution (MSR) Magneto-optical Disk is one of method to overcome the limitation of optical resolution. For a reliability of the disk, it is important to investigate the stability of the magneto-static coupling between a readout layer and a recording layer through readout characteristics. In this paper, we tested the reliability of CAD tMSR magneto-optical disk. We used iD PHOTO disk for the CAD MSR magneto-optical disk. In the disk, the data is recorded on land and groove with a track pit of 0.6 mu m and a bit length of 0.235 mu m, by a method of laser pumped magnetic field modulation with an optical pickup of NA=0.62, lambda-650 nm. The reliability was examined by PI error lines under the test condition of 80 degrees C-90 %RH. There were no considerable changes in read/write characteristics up to with an aging time of 2000 hour. The lifetime of the disk was estimated more than 7000 hour under the condition. By a method of the Arrhenius plots, we assumed that the lifetime of the disk would be more than 100 years under the condition of room temperature. We also confirmed that there were no significant changes in mechanical characteristics of the disks. These results show the disk using magnetostatic coupling has sufficient reliability for consumer use.
Phase-change storage is widely used in optical information technologies (DVD, CD-ROM and so on), and recently it has also been considered for non-volatile memory applications. This work reports advances in thermal dat...
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Phase-change storage is widely used in optical information technologies (DVD, CD-ROM and so on), and recently it has also been considered for non-volatile memory applications. This work reports advances in thermal data recording of phase-change materials. Specifically, we show erasable thermal phase-change recording at a storage density of 3.3 Tb inch(-2), which is three orders of magnitude denser than that currently achievable with commercial opticalstorage technologies. We demonstrate the concept of a thin film nanoheater to realize ultra-small heat spots with dimensions of less than 50 nm. Finally, we show in a proof-of-concept demonstration that an individual thin-film heater can write, erase and read the phase of these storage materials at competitive speeds. This work provides important stepping stones for a very-high-density storage or memory technology based on phase-change materials.
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