File:Doppler_laser_cooling.svg
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Summary
DescriptionDoppler laser cooling.svg |
English: Simplified principle of Doppler laser cooling:
(1) A stationary atom sees the laser neither red- nor blue-shifted and does not absorb the photon. (2) An atom moving away from the laser sees it red-shifted and does not absorb the photon. (3.1) An atom moving towards the laser sees it blue-shifted and absorbs the photon, slowing the atom. (3.2) The photon excites the atom, moving an electron to a higher quantum state. (3.3) The atom re-emits a photon. As its direction is random, there is no net change in momentum over many atoms. |
Source | Own work |
Author | Cmglee |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 06:32, 26 February 2013 | 512 × 1,280 (5 KB) | Cmglee | {{Information |Description ={{en|1=Simplified principle of Doppler laser cooling: (1) A stationary atom sees the laser neither red- nor blue-shifted and does not absorb the photon. (2) An atom moving away from the laser sees it red-shifted and doe... |
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Short title | Simplified principle of Doppler laser cooling |
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Image title | Simplified principle of Doppler laser cooling, drawn by CMG Lee. (1) A stationary atom sees the laser neither red- nor blue-shifted and does not absorb the photon. (2) An atom moving away from the laser sees it red-shifted and does not absorb the photon. (3.1) An atom moving towards the laser sees it blue-shifted and absorbs the photon, slowing the atom. (3.2) The photon excites the atom, moving an electron to a higher quantum state. (3.3) The atom re-emits a photon. As its direction is random, there is no net change in momentum over many atoms. |
Width | 100% |
Height | 100% |