uantum-Atom Optics Laboratory


Senior students must be familiar with important techniques used or to be used in the QAO lab, listed as following. Most of them can be found in related textbooks.

1. Laser cooling and trapping of neutral atoms
2. Magneto-optical trap: cool rubidium-85 atomic gas down to 100µK in few milliseconds
3. Doppler-free saturated absorption spectroscopy: standard frequency
4. Injection-locked diode lasers: amplify desired wavelength particularly at 780nm, 795nm and 830nm
5. Power amplified through tapered chip: 10 time power amplification of feeding laser usually ~3W
6. Laser amplifier in MOPA configuration
7. Rf evaporative cooling for cooling in the dark: cooling beyond one-photon recoil limit to nK region
8. Time orbiting potential (top) trap
9. 3D cooled optical lattices: versatile geometry lattice for simulations of condensed matter
10. Free-space Raman cooling: preparing electronic ground state better than 99.99%
11. Raman sideband cooling: preparing harmonic ground state better than 99.99%
12. Optical molasses: further cooling by one order from the MOT temperature
13. Compressed MOT: increase density of the cold cloud better than 3 times
14. Sisyphus cooling: s+-s- polarization gradient cooling to go beyond the Doppler limit
15. Fluorescence imaging: destructive probe but can be use to probe single atom
16. Off-resonant defocus imaging: new and non-demolition technique
17. Phase-contrast imaging
18. Light-assisted collisions: tuning atom-atom interaction via a photon
19. Atom sorting: counting few atoms in an optical potential well
20. Two-beam trap for MOT: Novel technique for producing MOT in 1D
21. Electromagnetic induced transparency: path interference of electron wave trapped in an atom
22. Rydberg blockade: preventing electronic state transition for long decoherence time
23. Fabry-Perot cavity: frequency counting and locking
24. Michelson interferometer
25. Far off-resonance optical dipole trap (FORT): trapping and isolating an atom
26. Frequency up/down conversion: locking frequency of lasers off atomic resonance frequencies
27. Four wave mixing: frequency generation
28. Optical pumping
29. Maxwell’s demon: selecting which atoms in which state allowed to pass using light sheets
30. Automatic frequency tuning for laser diode: continuous auto-correction allow control over many lasers simultaneously