Light emitting diode laser

The simplest electronic devices, such as diodes, light-emitting diodes, lasers, and photocells, have a single p-n junction. If we place, say, a p-type doped Si block in contact with n-typed doped Si block, electrons will normally flow from the n to the p regions but not vice versa. Thus, the p-n diode so created can be fitted with ohmic contacts to function as a rectifier of alternating current. Schottky junctions can act in this way to some degree even without deliberate creation of a p-n junction. 

LCAO LD TOP LECBD LED LIP LUMO linear combination of atomic orbitals laser-desorption time-of-flight low energy cluster beam deposition light-emitting diode laser-induced fluorescence lowest unoccupied molecular orbital... 

Light-Emitting Diode Laser Scanning Microscope... 

Many techniques have been used to measure the velocity of a projectile. The most widely used systems are instantaneous, discrete techniques such as sensors or chronographs. Impact or residual velocity of a projectile is calculated from the distance between two sensors divided by the time taken by the projectile flying between the sensors. Sensors currently employed in the ballistic range include light-emitting diodes, laser beams, thin wires, or infrared beam. Impact and residual velocities obtained from the rig are used to calculate the projectile kinetic energy loss AE ... 

Many metal polyynes have third-order nonlinear optical properties and these polymers are of interest from the point of view of new types of optical devices. Other types of potential applications of these polymers include light-emitting diodes, lasers, photoeells, field-effect transistors, low-dimensional conductors etc. [70]. 

A laser diode is a laser where the active medium is a semiconductor similar to that found in a light-emitting diode. Laser diodes are used in devices for optical storage, laser pointers, and fiber optics. 

Interest in AIN, GaN, InN and their alloys for device applications as blue light-emitting diodes and blue lasers has recently opened up new areas of high-pressure synthesis. Near atmospheric pressure, GaN and InN are nnstable with respect to decomposition to the elements far below the temperatures where they might melt. Thus, large boules of these materials typically used to make semiconductor devices caimot be grown from the... 

AQGa As grown on GaAs is used for the preparation of light-emitting diodes (LEDs), injection lasers and... 

Finally, an electric current can produce injection luminescence from the recombination of electrons and holes in the contact 2one between differendy doped semiconductor regions. This is used in light-emitting diodes (LED, usually ted), in electronic displays, and in semiconductor lasers. 

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