All-Optical Networks: the Last Piece of the Puzzle 36
Esther Schindler writes "An MIT professor explains why "simple" ideas require hard science and how a gemstone might be the key to an optical network. As the story begins: 'For years, the dream of an all-optical network has lain somewhere between Star Wars and a paper cup and a string. Recent successful work on the creation of an optical diode is a virtual case study in both the physics and materials sciences challenges of trying to develop all-optical networks. It is also a significant step towards their final realization.' One answer may be... garnet. Yes, the January birthstone. 'The material that Ross and others in her field use is a synthetic, lab-grown garnet film. Similar to the natural mineral, often used as a gemstone, it is transparent in the infrared part of the spectrum. This makes synthetic garnet ideal for optical communications systems, which use the near infrared. Unlike natural garnet, it's also magnetic. ... While it works, it's too big and too labor intensive for use as a commercial integrated chip. For that, you need to grow garnet on silicon. The challenge that Ross's group overcame is that garnet doesn't grow on silicon.'"
Higher Eduction (Score:2, Insightful)
It's amazing how much upper education is a much more ethnically-integrated environment for the finest minds in our country around the globe, but a few days ago we were told all the chinese students are spies we should watch out for (http://it.slashdot.org/story/12/04/10/0038244/fbi-says-american-universities-infiltrated-by-spies) And yet, here we are, all excited about the work some bright chinese grad student accomplished. It bugs me, that story.. a sense we are isolating ourselves from the world and what it would buy us?
A diode is not enough (Score:5, Insightful)
You also need a transistor for a logical circuit, and that's much harder.