All Questions
Tagged with absorption electronic-band-theory
5
questions
1
vote
0
answers
23
views
Einsteins Coefficient of Absorption in solid state
What solid state parameter determines the probability of absorption (Einsteins coefficient B) in a material? Is it material dependent?
I think, I cannot say bandgap. Because if I have a source having ...
- 1,348
0
votes
0
answers
37
views
What happens after bulk gold absorbs a photon with its energy at the band gap or higher (wavelength < 500 nm)?
As is explained in the answers of this question: Why are most metals gray/silver? nicely, the responsible transition occurs between the 5d orbital and the 6s orbital, which is relativistically shrunk ...
- 121
4
votes
1
answer
923
views
Derivation of Optical Absorption Coefficient in Semiconductors
I have been researching how to derive an expression for the absorption coefficient in semiconductors. I know the absorption coefficient can be expressed as such $$\alpha = A(hf-E_g)^{n}$$ with $n = \...
- 109
0
votes
1
answer
28
views
What does "Metal based electronic transition" means?
Recently I've been reading on the chiroptical activity of metal nanoparticles protected by biomolecular ligands, which have optical activity signals that are manifested in the metal-based electronic ...
- 211
2
votes
1
answer
135
views
Bandgaps of Silicon and their application in active optical elements
I know that silion has an indirect bandgap at $E = 1.12 \, eV $ or $ \lambda = 1.107 \, \mu m$ and I have read that active optical processes like absorption and emission have a decreased likelihood to ...
- 123