Information AboutBlue Laser |
| CATEGORIES ABOUT BLUE LASER | |
| compound semiconductors | |
| lasers | |
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Blue lasers have applications in many areas, from opto-electronic data storage at high-density, to medical applications. Until the mid 1990s blue lasers were large and expensive Gas Laser instruments which rely on Population Inversion in rare gas mixtures and need high currents and strong cooling. In the mid 1990's Shuji Nakamura at Nichia Chemical Industries in Anan (Tokushima-ken, Japan) in a series of inventions developed commercially viable blue and violet Semiconductor Laser s based on Gallium Nitride compound sectors, using Quantum Well s or Quantum Dot s spontaneously formed via Self-assembly . This invention enables the development of small, convenient and low priced blue, violet and UV lasers, which have not been available before, opening applications such as high-density DVD data storage Blu-ray disc, a blue laser will also be present in the Playstation 3 , the shorter wavelength will allow it to read discs with much more information. Use of Indium Gallium Nitride as a Semiconductor Material suitable for formation of Quantum Heterostructure s is proposed. Recently, CdS/ZnS quantum dots have been used as the gain material in spherical Whispering Gallery Mode lasers; see Applied Physics Letters, 2005, 86:073102. SEE ALSO FURTHER READING
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