title: Cascaded silicon-on-insulator double-ring sensors operating in high-sensitivity transverse-magnetic mode.
abstract: We demonstrate ultrahigh-sensitivity silicon photonic sensors based on two cascaded double-ring resonators operating in transverse-magnetic mode. Both wavelength interrogation and intensity interrogation methods are experimentally investigated and the sensitivities reached 24,300 nm/RIU and 2430 dB/RIU, respectively. We also show that the double-ring sensors can be simply cascaded to realize simultaneous detection of multiple species, which is very promising for low-cost array applications.
authors.affiliation: Centre for Integrated Optoelectronics, State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China.
authors.forename: Xianxin
authors.initials: X
authors.lastname: Jiang
authors.forename: Junjun
authors.initials: J
authors.lastname: Ye
authors.forename: Jun
authors.initials: J
authors.lastname: Zou
authors.forename: Mingyu
authors.initials: M
authors.lastname: Li
authors.forename: Jian-Jun
authors.initials: JJ
authors.lastname: He
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D060328:Magnetic Phenomena; D055616:Microtechnology; D012825:Silicon
chemical_list: D012825:Silicon