Entries with tag waveguides.

Researchers Create Inexpensive Holographic Display

MIT Media Lab researchers have developed a low-cost color holographic video display powered by a $10 optical chip they created. The prototype display can update images fast enough—30 times per second—to make the image look like it is in motion. The device could lead to affordable color holographic-video displays and increase conventional 2D displays’ resolutions. The chip is the least expensive component in the system, but it is not the only newly-devised component. Typically, it is difficult to control the light waves to create a holographic video image. Existing technologies are too expensive and cumbersome. As a solution, the researchers used a lithium niobate crystal, smaller than other materials previously attempted, and a single waveguide for each pixel in their system. The waveguides confine the light traveling through them and each can be located in close proximity to each other. Each waveguide also contains a metal electrode able to create an acoustic wave, which is used to filter light. The images they made refreshed at a rate of five frames per second and were 420 × 420 pixels. The researchers published their findings in Nature. (Mashable)(Discovery News)(MIT)(Nature)

New Waveguide Technology Combines Semiconductor, Metal

Researchers from A*STAR Institute of Microelectronics have created a new waveguide technology that effectively combines semiconductor and metal materials to take advantage of both conventional optics and plasmonics. This could enable them to create  smaller optical circuits. They constructed a waveguide made from semiconductor silicon that was oxidized to insulate the material; then covered it with a thin layer of copper. The light travels along the silicon core of this waveguide. The researchers say because it is silicon based, these new waveguide structures could be manufactured using conventional processes. Because silicon and silicon-related material are used, these waveguides could be used for light amplification as well as controlling other light properties. The researchers say their goal is to make a complete nanoplasmonic circuit.  (Science Daily)(R&D Magazine)(Optics Express)

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