Journal
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
Volume 11, Issue 4, Pages 462-465Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TTHZ.2021.3063847
Keywords
Planar waveguides; Optical pulses; Optical frequency conversion; Optical variables control; Optical refraction; Crystals; Silicon; Lithium niobate; nonlinear optics; optical rectification; terahertz (THz)
Funding
- Natural Sciences and Engineering Research Council of Canada
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Optical rectification is studied in an Si-SiO2-LiNbO3-polymer-Si planar waveguiding arrangement that generates and emits terahertz (THz) radiation as Cherenkov waves. Each supported mode (TE0, TE1, and TE2) generates a THz electric field pulse emitted at a distinct Cherenkov angle with frequencies up to around 3 THz, automatically satisfying phase-matching via Cherenkov emission and allowing subwavelength confinement of the excitation pulse.
Optical rectification is investigated in an Si-SiO2-LiNbO3-polymer-Si planar waveguiding arrangement that generates and emits terahertz (THz) radiation as Cherenkov waves. Each mode supported by the waveguide (i.e., the TE0, TE1, and TE2 mode) generates a THz electric field pulse that is emitted at a distinct Cherenkov angle and contains frequencies up to similar to 3 THz. This waveguiding platform automatically satisfies the phase-matching condition via Cherenkov emission and permits subwavelength confinement of the excitation pulse.
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