Journal
PHYSICAL REVIEW B
Volume 78, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.125203
Keywords
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Funding
- Department of Energy, Basic Energy Sciences
- Stanford PULSE (Photon Ultrafast Laser Science and Engineering) Institute
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An ultrafast terahertz (THz) source has been employed to study the nonlinear response of semiconductors to near-half-cycle femtosecond pulses in the THz regime. We report nonlinear absorption and self-phase modulation of the THz pulses associated with ultrafast impact ionization processes and the development of an electron cascade on femtosecond time scales by THz pump-THz probe measurements.
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