The Multi-photon Resonant Nondegenerate Multi-wave Mixing in the Middle Level via Quantum Interference
|Course||Atomic and Molecular Physics|
|Keywords||Multi - wave mixing Four-wave mixing Six-wave mixing Quantum Interference Polarimetric interferometry|
Multi- wave mixing spectroscopy is a very versatile technology, can be used to study atoms are highly excited state and the high angular momentum states . The optical path is simple and easy to operate, have excellent spatial signal resolution can be free to choose the interaction volume , phase matching can be implemented in a wide frequency range ( from a few hundred to thousands of wavenumber ) ; atomic transition frequency as it relates to multi- photon resonance , multi - wave mixing signal can be resonance enhanced by several orders of magnitude . This thesis : this study the introduction of an intermediate state quantum interference of two-photon resonant nondegenerate four-wave mixing ( NFWM ) . Using this method , not only can measure the resonant frequency and the transverse relaxation , and can be measured transition dipole matrix elements ; addition, it is more important to be able to study two highly excited transitions between atomic states , and this transition due to the radiative lifetime It is long, it is difficult to directly measure the fluorescence method . Next, the introduction of an intermediate state quantum interference of two-photon resonant nondegenerate four-wave mixing in a Doppler effect, the introduction of an intermediate state quantum interference of two-photon resonant nondegenerate four-wave mixing different speed between atoms polarimetric interferometry . Discussed in detail the impact of the polarization of interference on NFWM spectrum . Second, further research nondegenerate six-wave mixing (NSWM) and the intermediate state quantum interference polarization interference effects of the photon resonance NSWM the intermediate states of quantum interference in three-photon resonance .