We report on the third harmonic generation (THG) in InSb semiconductor irradiated by a
terahertz (THz) free electron laser (FEL). The conversion of 4? THz (wavelength 70? µm) …

Graphene has recently been shown to exhibit ultrafast conductivity modulation due to
periodic carrier heating by either terahertz (THz) waves, leading to self-induced harmonic …

Graphene has unique properties paving the way for groundbreaking future applications. Its
large optical nonlinearity and ease of integration in devices notably makes it an ideal …

Nonlinear phenomena in the THz spectral domain are important for understanding the
optoelectronic properties of quantum systems and provide a basis for modern information …

The nonlinear susceptibility in the terahertz region is expected to have a non-negligible
imaginary part originating from the momentum-dependent scattering time of free carriers, but …

The use of the THz frequency domain in future network generations offers an unparalleled
level of capacity, which can enhance innovative applications in wireless communication …

Terahertz high harmonic generation (THz HHG) is a common property of nonlinear systems.
Recently it has been used to investigate fundamental principles that govern transport and …

We report the observation of second harmonic generation with high conversion efficiency∼
0.005% in the terahertz regime from thin films of the topological insulator Bi 2 Se 3 that …

The nonlinear susceptibility in the terahertz region is expected to have a non-negligible
imaginary part originating from the momentum-dependent scattering time of free carriers, but …

Graphene has recently been shown to exhibit a strong nonlinear response in frequency
multiplication experiments with sub-1-THz radiation. This nonlinearity arises from ultrafast …