What is a quantum well?
Quantum hole is used to limit electrons at a specific energy level. The quantum wells consist of an extremely thin semiconductor with a small zone gap, which consists of a material with a larger space gap. They are extremely small, usually between 1 and 20 nanometers. They are most commonly used in laser diodes and infrared display. The band gaps are areas in the orbit of the electron between the ground, where the electrons and the conductive band normally rest, higher energy orbitals move when they are enthusiastic. The gaps are barriers between ground strips and conductive bands that prevent electrons from reaching the conductive zone without gaining more energy than in their ground conditions. The larger the zone gap, the more energy it is necessary for the electrons to jump to this gap and reach the conductive band.
As soon as the electron reaches the conductive band, it releases its excess energy and falls back to its ground. By placing a microscopically thin semiconductor between material gapsAnd too wide to make the electrons jump easily, scientists can force electrons in the two -dimensional area of the thin semiconductor. In this way, the tpning electrons allow specific manipulation of energy.
Because electrons can only move in two directions, they can only produce the type of energy that the scientist or manufacturer wants. This energy is also focused on an extremely narrow current. Conference creates accurate lasers for optical devices for this focus. The well -known example of a quantum hole is in the players of the player in the compact disk (CD).
Quantum wells are called "Wells" not only because of their behavior of capture electrons, such as a well that would capture water, but also because of their appearance in the graph. When quantum wells are pictures on energy vs. The position graphs look like a deep valley or well, often in a rectangular shape. Quantum hole isThe type of potential well, which means there is a potential for the minimum fixed amount of energy to be produced.
Cultivated, rather than created, a quantum hole is usually made of material such as Gallium arsenide surrounded by aluminum arsenide. The wells are grown, most often, a process called epitaxes of a molecular beam, which uses effusion cells to shoot molecules of the substance on the basic substance. This method creates one atomic layer of well material every time the cell is fired.