Recent content by Cerkit

Can someone please explain the difference between Material dispersion and waveguide dispersion?

Does anyone know what gain guiding and index guiding mean in the context of lasers?

Ok. So what is it about the source of the wave that causes the oscillation?

Hi. Can someone explain for a propagating wave (ie an EM wave) when it is represented as oscillating and portrayed as a sine wave. What does the oscillation physically mean? Energy is being transferred as the wave propagates but what does the oscillation actually mean?

Can someone explain to me in the context of optoelectronic devices what rms linewidth means?? For example the rms linewidth of a particular laser is 0.1nm. What does that mean? and what implications does this have on a communications system using that laser? Thanks

Which method do you advise me to use as a first timer. Perturbation theory apparently doesn't account for strong fields...?

Also does anyone have any idea what kind of accuracy can be obtained through using infinite well approximation rather than the finite one?

Ok. Well as of now I have read through the variational method. I have also found a variational method for a triangle potential well but that is for an infinite well. The only explicit variational method I have found for a finite well is G.Bastard, E.E. Mendez ,Variational calculations on a...

Hi. Does anyone know how to perform perturbation theory for a finite well under the influence of an electric field? If not or also what other method is there to calculate the shift in subband energies under the influence of an E field in a quantum well? Thanks

I need to determine the distribution of electrons in a quantum well and therefore require the value of the fermi level in the conduction band.

Can you explain the terms in equation a bit more. Also how do you know the total number of electrons?

Hi. Does anyone know how to calculate the fermi level for the conduction band in a quantum well?