In situ control of integrated Kerr nonlinearity
- URL: http://arxiv.org/abs/2112.00122v1
- Date: Tue, 30 Nov 2021 21:48:20 GMT
- Title: In situ control of integrated Kerr nonlinearity
- Authors: Chaohan Cui, Liang Zhang, Linran Fan
- Abstract summary: Kerr nonlinearity in nanophotonic cavities provides a versatile platform to explore fundamental physical sciences.
We report the in situ control of integrated Kerr nonlinearity through its interplay with the cascaded Pockels nonlinear process.
- Score: 2.773426016230597
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Kerr nonlinearity in nanophotonic cavities provides a versatile platform to
explore fundamental physical sciences and develop novel photonic technologies.
This is driven by the precise dispersion control and significant field
enhancement with nanoscale structures. Beyond dispersion and pump engineering,
the direct control of Kerr nonlinearity can release the ultimate performance
and functionality of photonic systems. Here, we report the in situ control of
integrated Kerr nonlinearity through its interplay with the cascaded Pockels
nonlinear process. Kerr nonlinearity is tuned over 10~dB dynamic range without
modifying photonic structures. Fano resonance is observed with nonlinear
spectrum, in contrast to standard linear transmission. This confirms the
quantum interference between competing optical nonlinear pathways. Besides
nonlinearity enhancement, we also demonstrate the novel capability to suppress
the material intrinsic nonlinearity. Finally, we use the tunable nonlinearity
to control the spectral brightness and coincidence-to-accidental ratio of
single-photon generation. This work paves the way towards the complete
nanoscale control of optical nonlinear processes at quantum level.
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