Shot noise reduced terahertz detection via spectrally postfiltered electro-optic sampling
Shot noise reduced terahertz detection via spectrally postfiltered electro-optic sampling
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 …