Polarized THz radiation is increasingly being investigated and applied in the new interdisciplinary field “TeraNano.” We report the generation of terahertz (THz) radiation by a linearly polarized femtosecond optical pulse in black phosphorus (BP) crystallites grown by chemical vapor deposition. Characterization of THz radiation is performed by time-resolved THz spectroscopy. It was found that BP emits elliptically polarized THz radiation with an ellipticity of ε = 0.77 ± 0.03. A saturation was found in the dependence of the THz intensity on the intensity of the incident optical pump for the latter higher than 6 mJ / cm2. The results of our work can provide new fundamental knowledge needed to create detectors and generators based on BP in the THz range. |
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CITATIONS
Cited by 4 scholarly publications.
Terahertz radiation
Crystals
Polarization
Phosphorus
Laser beam diagnostics
Nonlinear crystals
Frequency conversion