Organic recording media for 3D bitwise optical memory on optical disks

Barachevsky, V. А.; Strokach, Yu. P.; Puankov, Yu. A.; Grebennikov, E. P.; Kiyko, V. V.; Krayushkin, М. М.

doi:10.1117/12.778763

SPIE Proceedings

2007

DOI: 10.1117/12.778763

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Organic recording media for 3D bitwise optical memory on optical disks

V. А. Barachevsky

Yu. P. Strokach

Yu. A. Puankov

et al.

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Cited by 3 publications

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“…This paper is devoted to recent results received by us throughout before carried out investigations [2]. The main attention is attended to the discussion concerning the development to photochromic recording media with the refractive and fluorescent readout for bitwise working optical memory.…”

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confidence: 98%

“…In this case, the absorption band of phosphore must be situated between absorption bands of both form of the photochromic compound. But for all that, the absorption spectrum of photoinduced form of the photochromic compound and the fluorescence band of the phosphor must be overlapped [2].…”

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confidence: 99%

“…This is a reason for their application in our following investigations. The compounds of this type undergo reversible photoinduced valence isomerization: 2.1 Photochromic materials for bitwise working optical memory with the refractive readout The photochromic properties of more than 200 dihetarylethenes with various bridging fragments [2] were studied by the spectral-kinetic method in solutions. This study showed that photochromic dihetarylethenes of this type are thermally irreversible.…”

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Light‐sensitive organic recording media for 3D optical memory

Barachevsky

Krayushkin

Kyiko³

et al. 2011

Phys. Status Solidi C

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This paper presents own results in the field of organic recording media for bitwise working (WERM) and archival (WORM) optical memory. For the development of recording media for bitwise WERM optical memory thermally irreversible photochromic compounds from diarylethene, fulgimide classes manifesting reversible photoinduced valence are used. For making WORM optical memory chromons which form fluorescent products from nonluminescent compounds during irreversible photochemical reaction under laser UV irradiation are suggested. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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confidence: 98%

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confidence: 99%

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confidence: 99%

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Light‐sensitive organic recording media for 3D optical memory

Barachevsky

Krayushkin

Kyiko³

et al. 2011

Phys. Status Solidi C

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Photochromic organic compounds for optical memory

Barachevsky

Krayushkin

2008

Russ Chem Bull

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For the purpose of target syntheses of new photochromic compounds, a relationship between the structure and properties of a series of the known thermally irreversible photochromes was analyzed using the spectral kinetic data obtained by the authors.Progress in information technologies demands a sharp increase in the informational capacity of information carriers and in the rate of data processing.An analysis of the modern state of research in this area 1 shows that the limiting density of information re cording on magnetic discs can reach 230 Gbit inch -2 . In this case, the informational capacity of magnetic discs can be increased to 20 Gbit. The rate of data processing can be 1 Gbit s -1 .In addition to magnetic discs, optical discs (ODs) for archive storage of information are widely popular. They can be of the CD type (type I), providing multiple read ing of an optical information recorded in a studio, and of the WORM type (type II) with a single recording and multiple reading directly in a personal computer. Rever sive ODs of the WERM type (type III) were created for operative multiple recording and repeated recording of optical information and its multiple reading. Optical in formation recording on the most part of known ODs is based on thermoinduced processes of substance conver sion. In the case of ODs of types I and II, information recording is performed due to the thermoinduced abla tion of deposited in vacuo layers of organic and inorganic substances. Reversible recording -rewriting of optical information in an OD of type III occurs due to the ther moinduced magnetization reversal of magnetic domains in optical discs or reversible phase transformations of metallic alloys. The informational capacity of these ODs used for information reading from a semiconducting la ser with a radiation wavelength of 650 nm is ~4.7 Gbit. New commercial ODs developed by the Blu ray Disc Association have the record breaking informational ca pacity: 25 Gbit for single sided and 50 Gbit for double sided (DVD) information carriers, which is achieved by the application of a semiconducting laser with a shorter wavelength (405 nm), an optical system with a digital aper ture of 0.7/0.8, and the photosensitive layer with a thickness of 0.1 mm.Prospects for increasing the informational capacity of ODs are related to the creation of multilayer photosensi tive coatings for bitwise information detection and thick (>2 mm) photosensitive layers for holographic informa tion detection. These ODs provide the three dimension al (3D) optical memory with the recording density higher than 1 Tbit due to information recording and reproduc tion in various layers of a detecting medium (in the case of the bitwise optical memory) or at different incident angles of the activating and recovering laser radiation (in the case of the holographic optical memory).The prospects for improving ODs for optical memory are associated with the use of photosensitive organic me dia that experience photochemical transformations. In principle, these media possess a hi...

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Photochromic and irreversible photofluorescent organic materials for 3D bitwise optical memory

Barachevsky

Кобелева

Валова

et al. 2010

Opt. Mem. Neural Networks

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Organic recording media for 3D bitwise optical memory on optical disks

Cited by 3 publications

References 0 publications

Light‐sensitive organic recording media for 3D optical memory

Light‐sensitive organic recording media for 3D optical memory

Photochromic organic compounds for optical memory

Photochromic and irreversible photofluorescent organic materials for 3D bitwise optical memory

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