|
fckm->
That's not entirely true, as the absorbtion spectrum looks like a lorentzian centered on 700nm. A Lorentzian is like a gaussian with larger "wings", and doesn't ever quite go to zero. So given enough passes through the crystal it will still absorb a blue photon. Oh, and scattering processes don't have the same narrow spectrum, so you can still get things like rayleigh scattering. You can also excite vibrational modes in the crystal lattice.
Oh, btw, I have a 493nm blue laser that I use to cool and trap single atoms.
|