Modeling of terahertz pulse temporal profiles generated by photoconductive semiconductor antennas | Izvestiya vuzov. Fizika. 2025. № 10. DOI: 10.17223/00213411/68/10/2

Modeling of terahertz pulse temporal profiles generated by photoconductive semiconductor antennas

Based on Maxwell's equations in the paraxial approximation, analytical expressions were derived to describe the spatiotemporal dynamics of single-cycle terahertz (THz) pulses in an optical medium with refractive index dispersion. It is shown that during propagation in the far-field diffraction zone, the THz pulse shape transforms from single-cycle to one-and-a-half-cycle oscillations, accompanied by a spectral shift toward higher frequencies. Comparison with experimental spectra demonstrated that the proposed formulas successfully describe the single-cycle emission of THz pulses generated by photoconductive antennas under excitation by a Ti:Sa laser.

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Keywords

photoconductive antennas, Gaussian beam, pulsed terahertz radiation, paraxial diffraction

Authors

Name	Organization	E-mail
Burmistrov Evgenii R.	Lomonosov Moscow State University	burmistrover@my.msu.ru
Avakyants Lev P.	Lomonosov Moscow State University	avakyants@genphys.phys.msu.su

Всего: 2

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