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- W2517387793 abstract "Nonstoichiometric SiNx with enhancing optical nonlinearity is enabled to facilitate the waveguide microring resonator for cross-wavelength all-optical data processing applications. The Si/N composition ratio of the nonstoichiometric SiNx can be detuned from stoichiometric to Si-rich by adjusting the SiH4/NH3 fluence ratios. Under pumping with incoming pulsed data, the comb-like transmittance of the nonstoichiometric SiNx microring resonator can spectrally red-shift by 100 pm as its effective refractive index changed by more than 1 order of magnitude due to the enhanced nonlinear Kerr effect. The enlarged refractive index of Δn = 1.6 × 10–4 with increasing nonlinear refractive index to n2 = 1.6 × 10–13 cm2/W at 1550 nm is observed at a Si concentration of 66.2% in the Si-rich SiNx film. In application, a cross-wavelength all-optical data conversion/inversion processor based on the nonstoichiometric SiNx microring resonator is presented. The dense nanoscale Si content formed by a higher Si/N composition ratio of the SiNx contributes to an enhanced Kerr effect based optical nonlinear switching, which enables the optimized 12 Gbit/s all-optical conversion of the pulsed return-to-zero on–off-keying (RZ-OOK) data with converted or inverted format. The photon lifetime of ∼19 ps in the Si-rich SiNx microring resonator cavity can support the Si-rich SiNx all-optical Kerr switch with a maximal bandwidth of up to 50 GHz." @default.
- W2517387793 created "2016-09-16" @default.
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- W2517387793 date "2015-08-05" @default.
- W2517387793 modified "2023-10-16" @default.
- W2517387793 title "Enhancing Optical Nonlinearity in a Nonstoichiometric SiN Waveguide for Cross-Wavelength All-Optical Data Processing" @default.
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- W2517387793 doi "https://doi.org/10.1021/acsphotonics.5b00192" @default.
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