5D DVD

WELCOME

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Presented byNikhil eg

ECETjajeec 038

5 dimensional dvd

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INTRODUCTIONINTRODUCTION

Scientists have unveiled new DVD technology that

stores data in five dimensions, making it possible to

pack more than 300 DVDs onto a single disc.

Multiplexed optical recording provides an un-

paralleled approach to increasing the information

density beyond 1012 bits per cm3

The major hurdle is the lack of a suitable recording

medium that is extremely selective in the domains

of wavelength and polarization3

CURRENT TECHNOLOGIESOptical RecordingThe process of recording signals on a medium

through the use of light, so that the signals may be reproduced at a subsequent time.

The introduction of the laser as a light source greatly improves the quality of reproduced signals

Optical data storage involves placing information in a medium so that, when a light beam scans the medium, the reflected light can be used to recover the information.

There are many forms of optical storage media like CD, DVD, Blu Ray Disc etc4

 Existing Technology

At present there exist so many different medium for performing optical recording. They are

1. Floppy Disc2. Compact Disc (CD)3. Digital Versatile Disc (DVD)4. Blu Ray Disc5. Holographic Versatile Disc

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Floppy Disc

A floppy disk is a data storage medium that is composed of a disk of thin, flexible ("floppy")

magnetic storage medium sealed in a square or rectangular plastic carrier lined with fabric that removes dust particles

Floppy disks are read and written by a floppy disk drive or FDD. Invented by the American information technology company IBM , floppy disks in 8-inch

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Compact Disc (CD)

The Compact Disc (also known as a CD) is an optical disc used to store digital data.

It was originally developed to store and playback sound recordings exclusively.

Standard CDs have a diameter of 120 millimetr (4.7 in) and can hold up to 80 minutes of uncompressed audio (700 MB of data).

The Mini CD has various diameters ranging from 60 to 80 millimetre (2.4 to 3.1 in); they are sometimes used for CD singles

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Digital Versatile Disc (DVD)

DVD is an optical disc storage media format, invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995.

DVDs offer higher storage capacity than compact discs while having the same dimensions.

DVDs are used in DVD-Video consumer digital video format and in DVD-Audio consumer digital audio format, as well as for authoring AVCHD discs.

DVDs containing other types of information may be referred to as DVD data discs.

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Blu Ray Disc

Blu-ray Disc (official abbreviation BD) is an optical disc storage medium designed to supersede the DVD format

The standard physical medium is a 12 cm plastic optical disc, the same size as DVDs and CDs. Blu-ray Discs contain 25 GB per layer

The name Blu-ray Disc refers to the blue laserused to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs.

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Holographic Versatile DiscThe Holographic Versatile Disc (HVD) is an

optical disc technology developed between April 2004 and mid-2008

that can store up to several terabytes of data on an optical disc the same size as a CD, DVD or Blu-Ray disc.

Standards for 100 GB read-only holographic discs and 200 GB recordable cartridges were published by ECMA in 2007, but no holographic disc product has appeared in the market.

A number of release dates were announced, all since passed.

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CONVENTIONAL OPTICAL STORAGE SCHEMES

Two Dimensional Optical Storage Three Dimensional StorageFOUR DIMENSIONAL STORAGEFIVE DIMENSIONAL DVD

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Two Dimensional Optical Storage

In this technology the data is written in ‘pits’ on the surface of the disc.

Examples are CD, DVD and blue ray disc. Smaller pits mean that for the same

available area, more data can be stored. This depends on how narrow is the laser

beam used for recording as well as reading. That is how a DVD holds more than that of a

CD and the storage capacity of a blue ray disc is very much higher than a DVD.

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2D optical storage

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Three Dimensional Storage Three dimensional optical storage

includes multi-layered and holographic storage.

In the case of multi-layer optical storage the data is held in multiple layers.

There will be two or more recording media packed in a single disc

Current optical data storage media, such as the CD and DVD store data as a series of reflective marks on an internal surface of a disc.

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3D storage (multilayered)

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FOUR DIMENSIONAL STORAGE

Along with the three dimensions mentioned above, the four dimensional storage makes use of an additional dimension, colour dimension.

This techno-logy is not implemented commercially.

Laser beams of different colours are used to encode data.

Individual bits can have different colours of encoding schemes

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FIVE DIMENSIONAL DVD

The new optical disc format - known as 5D DVD - is developed by researchers at Melbourne Australia's Swinburne University of Technology.

Along with the data storage techniques used by traditional optical disc formats, 5D DVD uses gold nanorods to record information using different wavelengths on the same location on the disc.

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THE CONCEPT OF FIVE DIMENSION

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READING PROCESS

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FIVE DIMENSIONAL RECORDING AND READOUT

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GOLD NANORODS

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SURFACE PLASMONS

A surface plasmon is an electromagnetic surface wave which propagates in metals with negative real component of their permittivity.

Surface waves can exist free of illuminating field – i.e. plasmons are true surface waves.

In some cases, SPs can travel distaces much longer than the skin depth of the metal (~ 100 mm’s) surface plasmons are highly localized – at sharp corners and discontinuities, charge accuulation results in high field intensities.

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Surface Plasmon on metallic surfaces

FIELDS OF APPLICATION

Medical FieldMilitary and Security ArenasEntertainment sectorSpace researchFinancial Sector

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ADVANTAGES

Large storage capacityLight and CompactData securityCompatible with existing technologyCan be manufactured on a large scale

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DISADVANTAGES

Slow writing speedImpracticality of using Titanium

Sapphire Femtosecond Laser Re-writability

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CONCLUSIONInstead of the current three dimensional

optical storage technologies, five dimensional DVD exploits the colour and

polarization of light as two additional dimensions along with the three spatial dimensions.

These multiple variables mean that the same volume of space can hold multiple bits in multiple ways, the researchers explain.

For instance, a space that responds to three different colors and two different polarizations can hold six bits.

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Any Questions..?Any Questions..?

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Thank youThank you

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