Highly Efficient Light Emitters – The Root to Green Laser
The emission of green laser light is of great importance for several applications and procedures particularly in biology, medicine or multimedia. A powerful green laser could revolutionise the market for portable beamers. So far, semiconductor based light emitters, such as laser pointers, convert infra-red into green light (Diode Pumped Solid State Frequency Doubled (DPSSFD) laser technology). A significant drawback of this technique is the loss of power and efficiency. In addition, those devices are limited when it comes to reduction in size for use in integrated devices.
The new technology involves a Zn-Cd- semiconductor material that features a band gap in the 2,2 eV – 2,5 eV range which allows the emission of green light. Contrary to current state of the art techniques the innovative technique produces a semiconductor material that is capable to emit green light directly. Ongoing development demonstrated successfully the optical induced emission of green light.
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