Excitation Mode-Dependent Terahertz Radiation Generation From a Subwavelength Si-SiO2-LiNbO3-polymer-Si planar Waveguide

Optical rectification is investigated in an Si-SiO 2 -LiNbO 3 -polymer-Si planar waveguiding arrangement that generates and emits terahertz (THz) radiation as Cherenkov waves. Each mode supported by the waveguide (i.e., the TE 0 , TE 1 , and TE 2 mode) generates a THz electric field pulse that is em...

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Bibliographic Details
Published in:IEEE transactions on terahertz science and technology 2021-07, Vol.11 (4), p.462-465
Main Authors: Carnio, Brett N., Shahriar, Basem Y., Hopmann, Eric, Elezzabi, Abdulhakem Y.
Format: Article
Language:English
Subjects:
Crystals
Electric fields
Excitation
Lithium niobate
Lithium niobates
nonlinear optics
Optical frequency conversion
Optical pulses
optical rectification
Optical refraction
Optical variables control
Phase matching
Planar waveguides
Polymers
Radiation
Silicon
Silicon dioxide
terahertz (THz)
Terahertz frequencies
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Summary:Optical rectification is investigated in an Si-SiO 2 -LiNbO 3 -polymer-Si planar waveguiding arrangement that generates and emits terahertz (THz) radiation as Cherenkov waves. Each mode supported by the waveguide (i.e., the TE 0 , TE 1 , and TE 2 mode) generates a THz electric field pulse that is emitted at a distinct Cherenkov angle and contains frequencies up to ∼3 THz. This waveguiding platform automatically satisfies the phase-matching condition via Cherenkov emission and permits subwavelength confinement of the excitation pulse.
ISSN:2156-342X
2156-3446
DOI:10.1109/TTHZ.2021.3063847