In the "laser" type of these devices, the gain medium typically has a P-I-N structure.
In the "laser" type of these devices, the gain medium typically has a P-I-N structure. In the hydraulic analogy, these devices are compared to a check valve, which only opens when the pressure difference is of the right magnitude and sign. These devices are symbolized by a triangle whose tip touches a straight line parallel to the base of the triangle. The 2014 (*) Nobel Prize in Physics was awarded to Akasaki, Amano, and Nakamura for developing a "blue" form of one type of these devices. A single p-n junction serves as one of these devices, which let current through under forward bias. For 10 points, name this circuit element which allows current to flow through in only one direction, whose "light-emitting" variant is used in modern light bulbs.
In the "laser" type of these devices, the gain medium typically has a P-I-N structure.
diodes [accept light-emitting diodes or LEDs, prompt on p-n junctions]