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(a) Group refraction index for optical frequencies. Experimental data are shown for GaP (squares) and ZnTe (triangles). Solid and dash lines present results from the model functions. (b) Refractive index spectra at THz frequencies. Experimental results for ZnTe (triangles) and GaP (circles). Model functions are solid lines.
Phase matching factor for optical and THz frequencies for thick ZnTe (a) and GaP (b) crystals. Labels inside plots show the value in “mm” units.
Spectral amplitude of generated THz radiation for different sets of , , . The solid lines obtained via the model and the other lines calculated from the experimental data. (a) GaP: dash line , , , and ; dot line , , , and ; dash dot line , , , and . (b) ZnTe: dash line , , , and ; dot line , , , and ; dash dot , , and .
Composite and single crystal based THz detector: (a) experimental data, (b) numerical simulation: Solid line—composite structure, dashed line—ZnTe only, doted line—GaP only.
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