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We show theoretically how electrical and pure spin AC currents can be optically injected in semiconductors via excitation of continuum carriers. The electrical current should be observable by detecting its THz radiation.
Long-range periodic nanoplane gratings written inside fused silica using a focused femtosecond laser beam can be erased and replaced with new gratings whose orientation is determined by the polarization of the femtosecond laser overwrite beam.
When the laser field consisting of sub-10-fs fundamental and its second harmonic was used for high harmonic generation, a continuum centered at 30 nm with a spectral bandwidth of 8 nm was obtained with an energy of 10 nJ.
We have designed a compact solid compressor by stimulated Brillouin scattering used in a fused silica glass. An 13 ns Nd:YAG laser pulse has been temporally compressed to a 1.2 ns pulse at 1064 nm.
We present a terahertz radiation detector that measures both transverse components of a terahertz single cyclepsilas electric field, allowing the study of polarization dependent properties of materials. Measurements of birefringence in quartz are presented.
We propose an optical scheme to probabilistically initialize and rotate the electron spin in a quantum dot using charged exciton states. Our proposal makes use of the properties of the sech pulses for two-level systems.
Ballistic pure spin currents generated via quantum interference in the absorption of femtosecond pulses are demonstrated to produce transverse ballistic Hall pure charge currents and vice versa via spin-dependent asymmetric scattering processes.
It is observed that writing by femtosecond laser from left to right can be different from writing in the opposite direction. Structures with broken mirror symmetry in chalcogenide glass are discovered. Chiral patterns are demonstrated.
We performed a systematic study of THz wave generation from laser-induced air plasma with individual controls of the omega and 2 omega beams. Our experimental result confirms that the four-wave-mixing is the major mechanism.
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