Multiple quantum wells improve the overlap of the gain region with the optical waveguide mode.
The picture is basically the same, but instead of atoms, think about quantum wells in a solar cell.
Such control has allowed the development of structures where the electrons can be confined in space, giving quantum wells or even quantum dots.
A tempting choice would be the use of eigenstates of single quantum wells.
Fortunately, the impact of this phenomenon can be reduced by choosing the distance between the quantum wells correctly.
They have built their device out of electrons moving through a series of structures known as quantum wells.
In a case where the quantum wells are identical, both levels have a two-fold degeneracy.
Different quantum wells of varying HgTe thickness can be built.
To compensate for the reduction in active layer thickness, a small number of identical quantum wells are often used.
"But we do know how to create quantum wells," he stated.
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