Timeline for how laser interact with atoms?
Current License: CC BY-SA 3.0
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| Apr 7, 2013 at 7:43 | history | edited | Ondřej Černotík | CC BY-SA 3.0 |
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| Apr 6, 2013 at 21:14 | comment | added | user1285419 | I am also thinking a picture like this, the atom absorb an photon so its momentum changed to $p$ but in a while the atom will emit the photon so it will take some momentum from the atom and averagely the atom doesn't gain net momentum so the net force the atom gain is zero, is that right? But if we only consider the time before the photon emitted, can I say it will see the force about $p/\tau$? | |
| Apr 6, 2013 at 21:12 | comment | added | user1285419 | Thanks for the explanation. It gives me some idea on laser though I am still confusing on some concepts. In the last part when you state the photon momentum, you said the momentum is $p=\hbar k$, so is that $k$ the $k$ given by the laser? So even the atoms absorb a photon from laser at frequency $\omega_0$, the momentum transferred to the atom is still $p=\hbar k$ instead of $p=\hbar k_0$? In the first part you explain, can I say the atom will stay in the excited state about the time $\tau$ so within that duration, the atom is experiencing momentum $p$? | |
| Apr 6, 2013 at 9:19 | history | answered | Ondřej Černotík | CC BY-SA 3.0 |