Spatial-time pattern of electrical field of terahertz pulse in the far field
Abstract
The spatial and temporal dependence of the electric field amplitude of a terahertz (THz) pulse of several oscillations in the far field near the focal plane of a parabolic mirror was experimentally obtained. During experimentation a space-time anomaly was discovered in the diffraction patterns. In the wave front of the field the amplitude decreases to zero, and going through this spatial plane, the phase of oscillations changes, while in the integrated intensity, there is a dip in the curve. The results can be applied in pulsed terahertz optics and spectroscopy.
Keywords
THz electric field pulsed THz radiation,
diffraction,
pulses of a few electromagnetic field oscillation
Supporting agencies: This work was supported by grant from the Ministry of Education and Science of the Russian Federation (projects No. 14.512.11.0020).
About the Authors
M. S. Kulya
St. Petersburg National Research University of Information Technologies, Mechanics and Optics
Russian Federation
Russian Federation
Saint Petersburg
Ya. V. Grachev
St. Petersburg National Research University of Information Technologies, Mechanics and Optics
Russian Federation
Russian Federation
Saint Petersburg
V. G. Bespalov
St. Petersburg National Research University of Information Technologies, Mechanics and Optics
Russian Federation
Russian Federation
Saint Petersburg
V. P. Kujanpaa
VTT Technical Research Centre of Finland
Finland
Finland
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Review
For citations:
Kulya M.S., Grachev Ya.V., Bespalov V.G., Kujanpaa V.P. Spatial-time pattern of electrical field of terahertz pulse in the far field. Nanosystems: Physics, Chemistry, Mathematics. 2013;4(2):206-213.
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