Transformation of Polarization of Terahertz Pulses Under Modulation Instability in Paraelectrics

The nonlinear propagation and interaction are theoretically investigated of two-dimensional and three-dimensional terahertz electromagnetic beams of different polarizations in nonlinear crystals. The attention is paid to paraelectric crystals like SrTiO 3 at the temperatures 50 - 200 K. The interact...

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Bibliographic Details
Published inMicrowaves, Radar and Wireless Communications, International Conference on pp. 90 - 93
Main Authors Grimalsky, V., Escobedo-Alatorre, J., Rapoport, Yu, Kotsarenko, A.
Format Conference Proceeding
LanguageEnglish
Published Warsaw University of Technology 01.07.2024
Subjects
Beams
Electromagnetic scattering
Energy exchange
energy transfer
Focusing
Frequency modulation
Geometry
modulation instability
nonlinear paraelectrics
Temperature distribution
terahertz pulses
two polarizations
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Summary:The nonlinear propagation and interaction are theoretically investigated of two-dimensional and three-dimensional terahertz electromagnetic beams of different polarizations in nonlinear crystals. The attention is paid to paraelectric crystals like SrTiO 3 at the temperatures 50 - 200 K. The interacting wave beams are subject to the modulation instability that results in the formation of the sequences of short envelope pulses of 2-10 picoseconds durations from the long input envelope pulses. The energy transfer from the pulse with the higher input amplitude to one with the smaller input amplitude occurs. The initial focusing of the beams compensates the wave losses and reduces the input amplitudes for observing the modulation instability.
ISSN:2995-0570
DOI:10.23919/MIKON60251.2024.10633999