Compact titanium dioxide waveguides with high nonlinearity at telecommunication wavelengths

Publication: Research - peer-reviewJournal article – Annual report year: 2018

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Dense integration of photonic integrated circuits demands waveguides simultaneously fulfilling requirements on compactness, low loss, high nonlinearity, and capabilities for mass production. In this work, titanium dioxide waveguides with a thick core of 380 nm exhibiting a compact mode size (0.43 mu m(2)) and a low loss (5.4 +/- 1 dB/cm) at telecommunication wavelengths around 1550 nm have been fabricated and measured. A microring resonator having a 50 mu m radius has been measured to have a loaded quality factor of 53500. Four-wave mixing experiments reveal a nonlinear parameter for the waveguides of 21-34 W-1 m(-1) corresponding to a nonlinear index around 2.3-3.6 x 10(-18) m(2)/W, which results in a wavelength conversion efficiency of -36.2 dB. These performances, together with the potentially simple dispersion engineering to the fabricated waveguides by the post processes, yield a strong promise for the titanium dioxide waveguides applied in photonic integrated circuits, especially for nonlinear implementations. (C) 2018 Optical Society of America
Original languageEnglish
JournalOptics Express
Volume26
Issue number2
Pages (from-to)1055-1063
ISSN1094-4087
DOIs
StatePublished - 2018
CitationsWeb of Science® Times Cited: 0

    Keywords

  • Titanium and Alloys, Semiconductor Devices and Integrated Circuits, Waveguides, Optical Devices and Systems, Chemical Products Generally, Inorganic Compounds, Four wave mixing, Integrated circuits, Optical resonators, Oxides, Photonic devices, Titanium, Titanium dioxide, Dense integration, Dispersion engineering, High nonlinearity, Loaded quality factor, Microring resonator, Non-linear parameters, Photonic integrated circuits, Telecommunication wavelengths, Photonic integration technology, Atomic and Molecular Physics, and Optics
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