Efficient isolation of multiphoton processes and detection of collective resonances in dilute samples
@article{Bruder2015EfficientIO, title={Efficient isolation of multiphoton processes and detection of collective resonances in dilute samples}, author={Lukas Bruder and Marcel Binz and Frank Stienkemeier}, journal={Physical Review A}, year={2015}, volume={92}, pages={053412} }
A novel technique to sensitively and selectively isolate multiple-quantum coherences in a femtosecond pump-probe setup is presented. Detecting incoherent observables and imparting lock-in amplification, even weak signals of highly dilute samples can be acquired. Applying this method, efficient isolation of one- and two-photon transitions in a rubidium-doped helium droplet beam experiment is demonstrated and collective resonances up to fourth order are observed in a potassium vapor for the first…
26 Citations
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