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We present terahertz emission from nonpolar InN due to carrier transport in stacking fault-related internal in-plane electric fields. Evidence of in-plane transport is observed as a terahertz waveform polarity flip with reversal of the c-axis.
Femtosecond switching of anisotropic nanostructure indicating birefringence with a time constant of plusmnb200 fs was observed. Such anisotropy has evolved by lowering threshold for defect formation and enhanced coherency of the electron plasma wave.
The polarization of ultrafast terahertz pulses generated in a laser induced plasma can be controlled by the relative phase of the fundamental and the second harmonic optical fields.
Anisotropic sensitivity of isotropic medium to femtosecond laser radiation is observed. The phenomenon is explained by unusual anisotropy at the interface produced by ultrashort light pulses with tilted front and referred as ultrafast light blade.
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