title: Ultrahigh sensitivity electric field detection with a liquid electro-optical film.
abstract: In this Letter, an electro-optical probe configuration with polar molecule liquids as the sensing film is proposed to improve the voltage sensitivity. This method exhibited increases in intrinsic sensitivities better than 0.1 mV/√Hz, 2 orders of magnitude larger than the normal method using a GaAs probe in the same measurement system. Based on the mechanism of orientation polarization, the electro-optic coefficient was measured to be 250 pm/V by the Teng-Man method at a modulation field of 100 Hz. This technology will be promising in applications of low-frequency field detection.
authors.affiliation: China State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
authors.forename: Ru-Long
authors.initials: RL
authors.lastname: Jin
authors.forename: Han
authors.initials: H
authors.lastname: Yang
authors.forename: Yan-Hao
authors.initials: YH
authors.lastname: Yu
authors.forename: Di
authors.initials: D
authors.lastname: Zhao
authors.forename: Jia
authors.initials: J
authors.lastname: Yao
authors.forename: Feng
authors.initials: F
authors.lastname: Zhu
authors.forename: Qi-Dai
authors.initials: QD
authors.lastname: Chen
authors.forename: Mao-Bin
authors.initials: MB
authors.lastname: Yi
authors.forename: Hong-Bo
authors.initials: HB
authors.lastname: Sun