Three independent femtosecond laser systems are used for generating ultrafast pulses in the mid-IR (and Terahertz(THz) spectral regions through the UV; infrared, THz and visible multi-element focal plane array cameras and instrumentation for capturing images and transient spectra of samples with a single laser pulse; detection systems capable of making accurate time-resolved amplitude and phase measurements on THz pulses as they interact with samples; Optical Parametric Amplifiers (OPA) and crystals for nonlinear frequency conversion.
Apparatus includes two femtosecond laser systems that are solid-state CW Diode pumped (YVO4) with 20-femtosecond Ti: sapphire oscillators and KHz Ti: sapphire regenerative amplifiers with a mid-IR OPAs for generating ultrafast pulses in the far-IR through UV; visible near-IR CCD and bolometer multichannel detector arrays and instrumentation for directly capturing images and transient spectra by up-converted THz images of samples.
Ti-sapphire kilohertz laser system which generates 2 watts at 805nm 40 fs pulses for time-resolved THz spectroscopy (background table). The regenerative amplifier (center) is pumped by a 20 watt nanosecond laser. The OPA (foreground) is used to generate tunable visible and near-infrared excitation pulses for pump-THz probing of photovoltaics as well as mid-IR probes for the TRIR apparatus.
Time-resolved THz spectrometer for spectral measurements of samples (0.2 to 10 THz) and transient spectroscopy of bimolecular, photovoltaic, and materials characterization.
Terahertz imaging apparatus employing high-power pulsed GaAs antenna or Lintium Niobate generators and object transmission and reflection geometries for direct imaging and hyperspectral studies relevant to homeland security applications.