High-efficiency second-harmonic generation in doubly-resonant χ[superscript (2)] microring resonators

• Main Authors: Bi, Zhuan-Fang (Contributor), Rodriguez, Alejandro W. (Contributor), Hashemi, Hila (Contributor), Duchesne, David (Contributor), Loncar, Marko (Author), Wang, Ke-Ming (Author), Johnson, Steven G. (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Mathematics (Contributor), Massachusetts Institute of Technology. Department of Physics (Contributor)
• Format: Article
• Language: English
• Published: Optical Society of America, 2013-08-27T17:55:14Z.
• Subjects: Article
• Online Access: Get fulltext

By directly simulating Maxwell'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.
National Science Foundation (U.S.). Materials Research Science and Engineering Centers (Program) (Award DMR-0819762)
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies (Contract W911NF-07-D-0004)
United States. Defense Advanced Research Projects Agency (Contract N66001-09-1-2070-DOD)