Now showing items 1-4 of 4

    • Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors 

      Grischkowsky, D.; Keiding, Soren; van Exter, Martin; Fattinger, Ch. (Optical Society of America, 1990-10)
      Using the method of time-domain spectroscopy, we measure the far-infrared absorption and dispersion from 0.2 to 2 THz of the crystalline dielectrics sapphire and quartz, fused silica, and the semiconductors silicon, gallium, ...
    • High-brightness terahertz beams characterized with an ultrafast detector 

      van Exter, Martin; Fattinger, Ch.; Grischkowsky, D. (AIP Publishing, 1989-07-24)
      We have significantly improved the emission and detection of electromagnetic beams of single-cycle 0.5 THz pulses, through the use of new dipolar antenna structures. The frequency response was extended to well beyond the ...
    • Observation of electromagnetic shock waves from propagating surface-dipole distributions 

      Fattinger, Ch.; Grischkowsky, D. (American Physical Society, 1989-06-19)
      We have directly measured the time-dependent electromagnetic shock wave generated by an electric surface-dipole distribution propagating faster than the phase velocity in the underlying dielectric substrate. The results ...
    • Point source terahertz optics 

      Fattinger, Ch.; Grischkowsky, D. (AIP Publishing, 1988-10-17)
      We demonstrate an ultrafast 10 micro-m sized, electric dipole source of terahertz radiation closely coupled to a 1 cm spherical mirror. This optical approach has the advantages of subpicosecond response times with essentially ...