title: Shot noise reduced terahertz detection via spectrally postfiltered electro-optic sampling.
abstract: In ultrabroadband terahertz electro-optic sampling (EOS), spectral filtering of the gate pulse can strongly reduce the quantum noise while the signal level is only weakly affected. The concept is tested for phase-matched electro-optic detection of field transients centered at 45 THz with 12 fs near-infrared gate pulses in AgGaS2. Our new approach increases the experimental signal-to-noise ratio by a factor of 3 compared to standard EOS. Under certain conditions an improvement factor larger than 5 is predicted by our theoretical analysis.
authors: Michael
authors: M
authors: Porer
authors: Jean-Michel
authors: JM
authors: Ménard
authors: Rupert
authors: R
authors: Huber