El Amili A, Souza M C M M, Vallini F, Frateschi N C, Fainman Y
Opt Lett. 2016 Dec 1;41(23):5576-5579. doi: 10.1364/OL.41.005576.
We experimentally investigate the application of magnetic fluids (MFs) on integrated silicon photonics. Using a ferrofluid-clad silicon microring resonator, we demonstrate active control of resonances by applying an external magnetic field. Relatively high loaded quality factors on the order of 6000 are achieved, despite the optical losses introduced by the magnetic nanoparticles. We demonstrate resonance shifts of 185 pm in response to a 110 Oe strong magnetic field, corresponding to an overall refractive index change of -3.2×10 for the cladding MF. The combination of MFs and integrated photonics could potentially lead to the development of magnetically controllable optical devices and ultra-compact cost-effective magnetic field sensors.
我们通过实验研究了磁性流体（MFs）在集成硅光子学中的应用。利用包覆铁磁流体的硅微环谐振器，我们展示了通过施加外部磁场对谐振进行主动控制。尽管磁性纳米颗粒引入了光学损耗，但仍实现了约6000的相对较高加载品质因数。我们展示了在110 Oe强磁场作用下185 pm的谐振位移，这对应于包层MF的总体折射率变化为-3.2×10 。MFs与集成光子学的结合可能会推动磁控光学器件和超紧凑、经济高效的磁场传感器的发展。
