2018/02/27 by Sven Ramelow, Alessandro Farsi, Ramelow, Sven +15
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Mechanical and Optical Resonators #Optics (physics.optics) #Photonic and Optical Devices #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.1802.10072
openalex publication_date 2018/02/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Second-order optical processes lead to a host of applications in classical\nand quantum optics. With the enhancement of parametric interactions that arise\ndue to light confinement, on-chip implementations promise very-large-scale\nphotonic integration. But as yet there is no route to a device that acts at the\nsingle photon level. Here we exploit the \χ(3) nonlinear response of a\nSi3N4 microring resonator to induce a large effective \χ(2).\nEffective second-order upconversion (ESUP) of a seed to an idler can be\nachieved with 74,000 %/W efficiency, indicating that single photon nonlinearity\nis within reach of current technology. Moreover, we show a nonlinear coupling\nrate of seed and idler larger than the energy dissipation rate in the\nresonator, indicating a strong coupling regime. Consequently we observe a\nRabi-like splitting, for which we provide a detailed theoretical description.\nThis yields new insight into the dynamics of ultrastrong effective nonlinear\ninteractions in microresonators, and access to novel phenomena and applications\nin classical and quantum nonlinear optics.\n