@article{936,
  author = {Zhuan-Fang Bi and Alejandro Rodriguez and Hila Hashemi and David Duchesne and Marko Loncar and Ke-Ming Wang and Steven Johnson},
  title = {High-efficiency second-harmonic generation in doubly-resonant $\chi^(2)$ microring resonators},
  abstract = {By directly simulating Maxwell{\textquoteright}s equations via the finite-difference time-domain (FDTD) method, we numerically demonstrate the possibility of achieving high-efficiency second harmonic generation (SHG) in a structure consisting of a microscale doubly-resonant ring resonator side-coupled to two adjacent waveguides. We find that > 94\% conversion efficiency can be attained at telecom wavelengths, for incident powers in the milliwatts, and for reasonably large bandwidths (Q \~{} 1000s). We demonstrate that in this high efficiency regime, the system also exhibits limit-cycle or bistable behavior for light incident above a threshold power. Our numerical results agree to within a few percent with the predictions of a simple but rigorous coupled-mode theory framework.},
  year = {2012},
  journal = {OE},
  volume = {20},
  number = {7},
  pages = {7526{\textendash}7543},
  url = {http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-7-7526},
}