Electric field sensor based on electro-optic polymer refilled silicon   slot photonic crystal waveguide coupled with bowtie antenna
  We present the design of a compact and highly sensitive electric field sensor based on a bowtie antenna-coupled slot photonic crystal waveguide (PCW). An electro-optic (EO) polymer with a large EO coefficient, r33=100pm/V, is used to refill the PCW slot and air holes. Bowtie-shaped electrodes are used as both poling electrodes and as receiving antenna. The slow-light effect in the PCW is used to increase the effective in-device r33>1000pm/V. The slot PCW is designed for low-dispersion slow light propagation, maximum poling efficiency as well as optical mode confinement inside the EO polymer. The antenna is designed for operation at 10GHz. 
Xingyu Zhang, Amir Hosseini, Xiaochuan Xu, Shiyi Wang, Qiwen Zhan, Yi   Zou, Swapnajit Chakravarty, and Ray T. Chen
physics.optics