QUANTUM DOT LASERS

SEMINAR ON QUANTUM DOT LASERS : The infrastructure of the Information Age has to date claimed in progress microelectronics to produce integrated circuits that are constantly becoming smaller, better, and cheaper. The emergence of photonics, where light rather than electricity is handled, we must advance in the information age. Central photonics revolution is the development of miniature light sources, such as Quantum dots (QDs). Today, the production of quantum dots to be created serve new Datacom and telecom markets. Recent advances in microcavity physics, new materials and manufacturing technologies has enabled a new generation of high performance QDS. This presentation quantum dots notices and commercial applications and discussion of recent research including new device structures such as composite resonators and photonic crystals semiconductor lasers are key components in a variety of techniques widely products, including compact disc players and laser printers, and they play vital the roles of optical communication systems. Based on the operation of the laser depends Create a public non-equilibrium electrons and holes, and coupling electrons and holes in the optical industry, which contributes to the radiated emissions. . Other advantages of quantum dot active layers are made to further reduce the threshold currents and increased differential gain, ie, laser operation more efficient. Since 1994, the demonstration of a quantum dot semiconductor laser (QD), the development of research, laser based on QDS was awesome. Since physics is completely different, arising from zero-dimensional electronic QD lasers States now exceeds the amount set flat and Lasers in several respects. These include the current density threshold minimum threshold dependence on temperature, and the range of wavelengths available where tense systems layer material. Self-organized quantum dots are formed from strained layer epitaxy. In achieving these conditions, the growth front spontaneously rearrange 3-dimensional islands form. An added weight in the 3-dimensional structured glass surface prevents the formation of dislocations. When the cover Additional epitaxy, strained coherent islands form the PQ to trap and isolate each electron-hole pair to create efficient light emitters.