Ultra-low-power second-order nonlinear optics on a chip

Timothy P. McKenna, Hubert S. Stokowski, Vahid Ansari, Jatadhari Mishra, Marc Jankowski, Christopher J. Sarabalis, Jason F. Herrmann, Carsten Langrock, M.M. Fejer, Amir H. Safavi-Naeini
Nature Communications
https://arxiv.org/abs/2102.05617