Double resonance technique, optical

The optical-optical double resonance technique was applied to determine which mechanism is predominant in the pumping of TPPZn (27, 28). Because of the large difference in the lifetimes of and T ... 

EPR but provides greatly enhanced resolution. Double resonance techniques (e.g. electron nuclear double resonance (ENDOR) and Overhauser shift measurements) combine the sensitivity of EPR with the resolution of NMR. Many such measurements on thin films are performed by combining optical detection with ENDOR, greatly enhancing the resolution of ODMR and taking advantage of its superior sensitivity. 

One might suppose that this pioneering application of radiofrequency/optical double resonance techniques to the study of an ion beam would soon be followed by others but, so far, this has not happened. This study involves a combination of different sophisticated techniques, not commonly found in the same laboratory. 

A double resonance technique in which transitions between spin sublevels are detected by optical means. Usually these are sublevels of a triplet, and the transitions are induced by microwaves. 

One of the important features of SEP, in common with other optical-optical double-resonance techniques, is the simplification of the spectra because laser I excites a single upper state. Thus, selection rules between the intermediate and final states greatly reduce the final allowed states. Of particular interest for the study of dissociation phenomena is that SEP allows for considerable control of the final states that are... 

The electronically excited states of most molecules are far less thoroughly investigated than their ground states. On the other hand, their level structure is generally more complex because of interactions between electron and nuclear motions, which are more pronounced in excited states (breakdown of the Born-Oppenheimer approximation, perturbations). It is therefore most desirable to apply spectroscopic techniques that are sensitive and selective and that facilitate assignment. This is just what the optical-microwave double-resonance technique can provide. 

A very sensitive and accurate double-resonance technique is microwave-optical double-resonance polarization spectroscopy (MOPS), developed by Ernst et al. 

Optical Pumping and Double-Resonance Techniques Fluorescence Dip 6 — 6,... 

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