[tt] Next Big Future - 2 new articles
Eugen Leitl
<eugen at leitl.org> on
Tue Aug 19 16:40:48 UTC 2008
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Date: Sat, 02 Aug 2008 02:45:40 -0400
To: eugen <eugen at leitl.org>
Subject: Next Big Future - 2 new articles
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Here are the latest updates for eugen at leitl.org
"[2]Next Big Future" - 2 new articles
1. [3]Carnival of Space Week 65
2. [4]Confining light to 10 nanometers matching size of future
lithography
3. [5]More Recent Articles
4. [6]Search Next Big Future
[7]Carnival of Space Week 65
[8]Carnival of space 65 is up at 21st century waves
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[15]Music of the spheres talks about solar power satellites
[16]This site contributed an article about the latest and future
thermoelectrics which has a space related angle for better RTGs
[17]Colony Worlds talks about likely iron on Mars
There is a LOT more. Go check out the Space Carnival.
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[35]Confining light to 10 nanometers matching size of future lithography
[36]Berkeley University has compressed light to 10 nanometers This
will make possible smaller optical fibers, but it could lead to huge
advances in the field of optical computing. Many researchers want to
link electronics and optics, but light and matter make strange
bedfellows, Oulton said, because their characteristic sizes are on
vastly different scales. However, confining light can actually alter
the fundamental interaction between light and matter. Ideally, optics
researchers would like to cram light down to the size of electron
wavelengths to force light and matter to cooperate.
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Oulton had been working on combining plasmonics and semiconductors,
where these losses are even more pronounced, when he came up with
an idea to achieve simultaneously strong confinement of the light
and mitigate the losses. His theoretical "hybrid" optical fiber
consists of a very thin semiconductor wire placed close to a smooth
sheet of silver.
"It's really a very simple geometry, and I was surprised that no
one had come up with it before," Oulton said.
Oulton ran computer simulations to test this idea. He found that
not only could the light compress into spaces only tens of
nanometers wide, but it could travel distances nearly 100 times
greater in the simulation than by conventional surface plasmonics
alone. Instead of the light moving down the center of the thin
wire, as the wire approaches the metal sheet, light waves are
trapped in the gap between them, the researchers found.
Oulton believes the hybrid technique of confining light could have
huge ramifications. It brings light closer to the scale of electrons'
wavelengths, meaning that new links between optical and electronic
communications might be possible.
This idea could be an important step on the road to an optical
computer, a machine where all electronics are replaced with optical
parts, Oulton said. The construction of a compact optical transistor
is currently a major stumbling block in the progress toward fully
optical computing, and this technique for compacting light and linking
plasmonics with semiconductors might help clear this hurdle, the
researchers said.
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----- End forwarded message -----
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Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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