A Description of in-band relaxation?

  • A
  • Thread starter Thread starter mksiver
  • Start date Start date
mksiver
Messages
2
Reaction score
3
TL;DR Summary
What is in-band relaxation?
Hello all,

My professor was talking about in-band relaxation in my laser engineering class not long ago, although he didn't give a very thorough description of what exactly it was. Would someone mind explaining it to me? From what I gather it's probably relaxation from two sub-levels of an upper electronic level of an atom/molecule.

Thanks!
 
Physics news on Phys.org
Maybe he’s referring to intraband relaxation in solids, where an electron-hole pair is excited away from the band edges and relaxes nonradiatively. It’s an important process in determining linewidths in quantum well lasers. See for example:

https://ieeexplore.ieee.org/document/35228
 
Thanks! That helps.
 
From the BCS theory of superconductivity is well known that the superfluid density smoothly decreases with increasing temperature. Annihilated superfluid carriers become normal and lose their momenta on lattice atoms. So if we induce a persistent supercurrent in a ring below Tc and after that slowly increase the temperature, we must observe a decrease in the actual supercurrent, because the density of electron pairs and total supercurrent momentum decrease. However, this supercurrent...
Hi. I have got question as in title. How can idea of instantaneous dipole moment for atoms like, for example hydrogen be consistent with idea of orbitals? At my level of knowledge London dispersion forces are derived taking into account Bohr model of atom. But we know today that this model is not correct. If it would be correct I understand that at each time electron is at some point at radius at some angle and there is dipole moment at this time from nucleus to electron at orbit. But how...

Similar threads

Back
Top