Electric Field Effect on Quantum Well

In summary, applying an electric field to a quantum well results in a tilted well and changes the 2-D density of states to 3-D bulk density. The density of states above a certain energy should have the same functional form as a regular 1D box. Slide 9 shows the merging of the 2-D DOS into a 3-D DOS under bias.
  • #1
kpsr
11
0
Hello everybody !

Recently i heard that, application of an electric field onto a quantum well tilts the quantum well
and changes its 2-D density of states to 3-D bulk density. Is this true..?
Can anybody give some more information or reference on this..?

Thanks for any Help.
 
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  • #2
The application of a constant electric field makes it so that the bottom of the quantum well is slanted, but the sides remain vertical.

I couldn't comment on how the density of states would change, except to say that above a certain energy (larger than the tall side of the slant) I think the density of states should have the same functional form as the regular 1D box.
 
  • #3
@jfizzix
Thanks for your reply, Please check this Slide's 9th page,
there we can see step like 2-d density of states (DOS) merging to form 3-D DOS under bias.
 

What is the Electric Field Effect on Quantum Well?

The Electric Field Effect on Quantum Well refers to the phenomenon in which an external electric field alters the electronic properties of a quantum well structure, causing changes in its energy levels and carrier distribution.

How does an electric field affect the energy levels in a quantum well?

An electric field applied across a quantum well creates a potential energy gradient, which shifts the energy levels of the confined electrons or holes. This results in a change in the energy levels and a redistribution of carriers within the quantum well.

What are the applications of the Electric Field Effect on Quantum Well?

The Electric Field Effect on Quantum Well has applications in optoelectronic devices, such as quantum well lasers and photodetectors, as well as in electronic devices, such as transistors and modulators. It can also be used in quantum computing and sensing technologies.

What factors influence the strength of the Electric Field Effect on Quantum Well?

The strength of the Electric Field Effect on Quantum Well is influenced by the material properties of the quantum well, such as its bandgap and carrier mobility, as well as the strength and direction of the applied electric field.

How is the Electric Field Effect on Quantum Well studied and measured?

The Electric Field Effect on Quantum Well can be studied and measured through various techniques, including photoluminescence spectroscopy, capacitance-voltage measurements, and Hall effect measurements. These techniques allow for the characterization of the energy levels and carrier distribution in the quantum well under different electric field conditions.

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