Switchable Hologram Promises Memory Boost
15 06 2007
AÂ device that stores holograms using a liquid crystal film controlled electronically has been created by researchers in Singapore. They hope that future versions could be used to store large amounts of digital data in small areas, or to manipulate living cells with light.
Holographic memory can store more information than memory technologies like CDs and DVDs because information can be encoded in three dimensions, in the form of light interference. In fact, holographic data disks are already on the market (see Start of the hologram wars), although these can only be written to once.
Xiaowei Sun and Liu Yanjun at Nanyang Technological University, Singapore, have now taken a step towards creating a rewritable holographic memory device. It consists of a cell - around 7 millimetres square - containing an 8-micron-thick layer of liquid crystal and polymer.
Source: http://www.newscientisttech.com/article/dn11964-switchable-hologram-promises-memory-boost.html























