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(Color online) Room temperature reflection spectrum of sample at near-normal incidence.
(Color online) Dependence of THz power on azimuthal angle for angles of incidence (a) 45° and (b) 75°. The full line is the fit with .
(Color online) Variation of on near-infrared fs pump power for angles of incidence (a) 45° and (b) 75°. The intensity diameter of the pump beam is approximately . This is equivalent to an excitation fluence (or energy density) normal to beam propagation of approximately at pump power. The dependence of the output power on the input power is close to quadratic.
(Color online) Variation of THz power with temperature for angle of incidence 45°.
Comparison of THz power generated by 1 mm thick ZnTe and -type InAs under similar conditions of excitation and detection. is the angle of incidence.
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