221 citations · 658 across the 4 of their papers we have counts for
4 papers
Terahertz Kerr effect
Matthias C. Hoffmann, Nathaniel C. Brandt, Harold Y. Hwang +2
We have observed optical birefringence in liquids induced by single-cycle THz pulses with field strengths exceeding 100 kV/cm. The induced change in polarization is proportional to…
Observation of Nonequilibrium Carrier Distribution in Ge, Si and GaAs by Terahertz-pump--Terahertz-probe Measurements
Janos Hebling, Matthias C. Hoffmann, Harold Y. Hwang +2
We compare the observed strong saturation of the free carrier absorption in n-type semiconductors at 300 K in the terahertz frequency range when single-cycle pulses with intensitie…
THz-pump -- THz-probe spectroscopy of semiconductors at high field strengths
Matthias C. Hoffmann, Janos Hebling, Harold Y. Hwang +2
Pumping n-type GaAs and InSb with ultrafast THz pulses having intensities higher than 150 MW/cm2 shows strong free carrier absorption saturation at temperatures of 300 K and 200 K…
Impact ionization in InSb probed by THz-pump THz-probe spectroscopy
Matthias C. Hoffmann, Janos Hebling, Harold Y. Hwang +2
Picosecond carrier dynamics in indium antimonide (InSb) following excitation by below-bandgap broadband far infrared radiation were investigated at 200 K and 80 K. Using a novel TH…