See also gallium arsenide .
vertical cavity surface emitting laser (VCSEL)
A vertical cavity surface emitting laser (VCSEL...(SearchCIO-Midmarket.com)
Gallium nitride (GaN) is a semiconductor compound expected to make possible miniaturized, high-power wireless transmitters. These transmitters will be combined with sensitive receivers into telephone sets capable of directly accessing communications satellite . The compound can also be used in light-emitting diodes ( LED s) and other semiconductor devices.
The advantages of GaN devices include high output power with small physical volume, and high efficiency in power amplifiers at ultra-high and microwave radio frequencies.
The main problem with GaN technology is cost. A special process is required to grow a GaN crystal or wafer on which transistor s and integrated circuits ( IC s) can be fabricated. Once the process is implemented on a large scale, the cost should come down.