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We report on our terahertz study of the reduction effect on graphene oxide films grown on fused silica substrates by spin-coating. The optical characteristics before and after thermal reduction were studied by terahertz time-domain spectroscopy.
We report on the method that terahertz generation and detection were simultaneously performed via non-collinear optical parametric interaction in a nonlinear crystals using a Si-photodiode. The bandwidth manipulation between broad 3.3 THz and narrow 45GHz bandwidths was demonstrated at single quasi-phase-matching crystal using the position-dependence of the crystal.
This paper presents a theoretical investigation on a THz pulse shaping method based on difference frequency generation of two orthogonally polarized optical pulses. This scheme is effective in controlling the amplitude and polarization of generated THz pulse. The power spectrum from ZnTe, GaAs and GaP crystals is compared when considering crystal absorption and phase mismatching condition. Simulation...
We performed optical-pump terahertz-probe measurements on antiferromagnetic MnO. The transient decrease in transmission at the peak of THz single-cycle pulses suggests that photoexcited carriers are produced in MnO. Below the Neel temperature, magnon scattering mainly contributes the relaxation of photoexcited carriers.
We propose a new technique for efficient generation of 6 THz near-single-cycle transients though optical rectification of 800 nm fs laser pulses in a DAST/SiO2 multilayer structure. The use of such a composite material allows to obtain phase-matching and control cascaded nonlinear processes.
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