NDLI: Slot Waveguides With Silicon-Rich Materials for Nonlinear Applications

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Slot Waveguides With Silicon-Rich Materials for Nonlinear Applications

Content Provider	Directory of Open Access Journals (DOAJ)
Author	Xiaoyan Wang Wenjun Yi Xiujian Li Xiaowei Guan Meicheng Fu Lars Frandsen
Abstract	Slot waveguides based on silicon-rich materials are proposed and experimentally demonstrated, which consist of a silicon-rich oxide (SRO) slot layer sandwiched by two silicon-rich nitride (SRN) layers. Measurements show the waveguides have a low propagation loss of $\sim$2.2 dB/cm and a 50-$\mu \text{m}$-radius micro-ring resonator can achieve a loaded quality factor ($Q_{load}$) of $\sim 10^5$. Four-wave mixing experiments in the slot waveguides reveal a high nonlinearity $\gamma$ of 16 W$^{-1}$m$^{-1}$ of the waveguide and an averaged nonlinear index $n_2$ of 2.5 x 10$^{-18}$ m $^2$/W of the silicon-rich materials, 10 times larger than that of stoichiometric silicon nitride (Si$_3$N$_4$). Supercontinuum generation (SCG) experiments have shown a large fabrication tolerance of such slot waveguides that 1.2 octave spectral broadening in a 1510-nm-wide slot waveguide can be achieved while that is 0.9 octave in a slot waveguide with a width shrinking as large as 220 nm.
Related Links	https://ieeexplore.ieee.org/document/9399784/
e-ISSN	19430655
DOI	10.1109/JPHOT.2021.3072142
Journal	IEEE Photonics Journal
Issue Number	3
Volume Number	13
Language	English
Publisher	IEEE
Publisher Date	2021-01-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Applied Optics. Photonics Optics. Light Integrated Optics Nonlinear Photonics Supercontinuum Generation Four-wave Mixing
Content Type	Text
Resource Type	Article

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