Mahmood Aseel, Kavungal Vishnu, Ahmed Sudad S, Farrell Gerald, Semenova Yuliya
Opt Lett. 2015 Nov 1;40(21):4983-6. doi: 10.1364/OL.40.004983.
In this work, a magnetic-field sensor was designed to take advantage of the tunability of the resonance wavelengths of a cylindrical whispering-gallery-mode microresonator. The microresonator is based on a 1.3 cm length of photonic crystal fiber infiltrated with a magnetic fluid containing nanoparticles with diameters of either 5 or 10 nm. The Q-factor achieved for the microresonators was 4.24×10(3) or higher. When a magnetic field is applied, the whispering-gallery-mode resonances shift toward longer wavelengths. The experimentally demonstrated sensitivity of the proposed sensor was as high as 110 pm/mT in the magnetic field range from 0 to 38.7 mT.
在这项工作中，设计了一种磁场传感器，以利用圆柱形回音壁模式微谐振器共振波长的可调性。该微谐振器基于一段1.3厘米长的光子晶体光纤，其中注入了含有直径为5纳米或10纳米纳米颗粒的磁性流体。这些微谐振器实现的品质因数为4.24×10³或更高。当施加磁场时，回音壁模式共振向更长波长移动。在0至38.7毫特斯拉的磁场范围内，所提出传感器的实验证明灵敏度高达110皮米/毫特斯拉。
