2022
DOI: 10.1021/acsphotonics.2c00038
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High-Efficiency Second-Harmonic and Sum-Frequency Generation in a Silicon Nitride Microring Integrated with Few-Layer GaSe

Abstract: A silicon nitride (SiN) photonics platform has attributes of ultra-low linear and nonlinear propagation losses and CMOS-compatible fabrication processes, promising large-scale multifunctional photonic circuits. However, the centrosymmetric nature of SiN inhibits second-order nonlinear optical responses in its photonics platform, which is desirable for developing efficient nonlinear active devices. Here, we demonstrate high-efficiency second-order nonlinear processes in the SiN photonics platform by integrating… Show more

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Cited by 11 publications
(7 citation statements)
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“…By fitting the resonance dips with Lorentzian line shapes, the Q factor of the resonance modes is calculated to be 1000. It should be noted that the resonance dips would red-shift by 1.7 nm after SnP 2 Se 6 overlapping, which is attributed to the perturbation of resonance modes arised from the high refractive index of SnP 2 Se 6 7 . As expected, strong optical signals around 780 nm were collected from the output grating coupler by exciting SnP 2 Se 6 nanosheet from the SiN microring resonator.…”
Section: Resultsmentioning
confidence: 99%
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“…By fitting the resonance dips with Lorentzian line shapes, the Q factor of the resonance modes is calculated to be 1000. It should be noted that the resonance dips would red-shift by 1.7 nm after SnP 2 Se 6 overlapping, which is attributed to the perturbation of resonance modes arised from the high refractive index of SnP 2 Se 6 7 . As expected, strong optical signals around 780 nm were collected from the output grating coupler by exciting SnP 2 Se 6 nanosheet from the SiN microring resonator.…”
Section: Resultsmentioning
confidence: 99%
“…Benefiting from the odd-even layer-independent SHG activity and high SHG susceptibility at telecom wavelength, multilayer SnP 2 Se 6 with sufficient thickness for high-efficient frequency conversion can be integrated into SiN photonic platform, thus enabling the design of on-chip optical modulator 14 . Compared with the free-space interaction mode, a remarkable enhancement of SHG process can be expected by integrating 2D NLO materials into photonic microring resonator due to strong light-matter coupling effect 7 . Figure 5a displays the OM image of a SiN photonic structure for on-chip SHG, in which two bus-waveguides are coupled with a SiN microring resonator.…”
Section: Resultsmentioning
confidence: 99%
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“…Except for the above-mentioned studies, dielectric nanostructures with other various configurations such as subwavelength patterned TMDs surfaces, [362] dielectric microspheres [373] or microring [374] and dielectric substrates, [375,376] etc. can also be used to tune the nonlinear response of 2DLMs.…”
Section: Dielectric Nanoresonant Couplingmentioning
confidence: 99%