David Kirkpatrick

January 26, 2010

Optical computing breakthrough

Filed under: Science, Technology — Tags: , , , , , — David Kirkpatrick @ 3:06 pm

Via KurzweilAI.net — It really is fun watching to see where the next big advancement in computing comes from. Optical computers, quantum computers, something we haven’t even heard of yet? One thing is certain, computers will continue to become more and more powerful for the foreseeable future.

Spasers set to sum: A new dawn for optical computing
New Scientist Tech, Jan. 25, 2010

The “spaser,” the latest by-product of a buzzing field known as nanoplasmonics, based on plasmons, may lead to building a super-fast computer that computes with light.

Plasmons, which are ultra-high-frerquency electron waves on a metallic surface, overcome the speed limits of the wires that interconnect transistors in chips, allowing for converting electronic signals into photonic ones and back again with speed and efficiency.
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August 20, 2008

Optical computing coming soon?

Filed under: Science, Technology — Tags: , , , , — David Kirkpatrick @ 5:59 pm

From KurzweilAI.net — optical computing is an exciting development and looks like it’s coming down the pike.

Scientists Move Optical Computing Closer to Reality
PhysOrg.com, Aug. 19, 2008

University of Pennsylvania scientists have theorized a way to increase the speed of pulses of light traveling in nanoparticle chains (acting as miniature waveguides) to 2.5 times the speed of light by altering the particle shape.

As the velocity of the light pulse increases, so too does the operating bandwidth of a waveguide, thus increasing the number of information channels and allowing more information to flow simultaneously through a waveguide.

They found that shaping the particles as prolate, cigar-shaped or oblate, saucer-shaped spheroids boosted the velocities of surface plasmon pulses reflecting off the surface to 2.5 times the speed of light in a vacuum, while decreasing power loss.

Application of this theory would use nanosized metal chains as building blocks for novel optoelectronic and optical devices, which would operate at higher frequencies than conventional electronic circuits. Such devices could eventually find applications in the developing area of high-speed optical computing, in which protons and light replace electrons and transistors for greater performance.

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