wang-ultrasensitivesilicon-2019.pdf (1.57 MB)
An ultrasensitive silicon photonic ion sensor enabled by 2D plasmonic molybdenum oxide
journal contribution
posted on 2019-03-01, 00:00 authored by Guanghui Ren, Bao Yue Zhang, Qifeng Yao, Ali Zavabeti, Cesar S Huertas, Robert Brkljača, Muhammad Waqas Khan, Hussein Nili, Robi S Datta, Hareem Khan, Azmira Jannat, Sumeet Walia, Farjana Haque, Luke O'DellLuke O'Dell, Yichao Wang, Lianqing Zhu, Arnan Mitchell, Jian Zhen OuSilicon photonics has demonstrated great potential in ultrasensitive biochemical sensing. However, it is challenging for such sensors to detect small ions which are also of great importance in many biochemical processes. A silicon photonic ion sensor enabled by an ionic dopant-driven plasmonic material is introduced here. The sensor consists of a microring resonator (MRR) coupled with a 2D restacked layer of near-infrared plasmonic molybdenum oxide. When the 2D plasmonic layer interacts with ions from the environment, a strong change in the refractive index results in a shift in the MRR resonance wavelength and simultaneously the alteration of plasmonic absorption leads to the modulation of MRR transmission power, hence generating dual sensing outputs which is unique to other optical ion sensors. Proof-of-concept via a pH sensing model is demonstrated, showing up to 7 orders improvement in sensitivity per unit area across the range from 1 to 13 compared to those of other optical pH sensors. This platform offers the unique potential for ultrasensitive and robust measurement of changes in ionic environment, generating new modalities for on-chip chemical sensors in the micro/nanoscale.
History
Journal
SmallVolume
15Issue
9Article number
e1805251Pagination
1 - 10Publisher
John Wiley & SonsLocation
Chichester, Eng.Publisher DOI
Link to full text
eISSN
1613-6829Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2019, WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimUsage metrics
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2D materialsdoped semiconductorsintegrated opticsion sensorssilicon photonicsScience & TechnologyPhysical SciencesTechnologyChemistry, MultidisciplinaryChemistry, PhysicalNanoscience & NanotechnologyMaterials Science, MultidisciplinaryPhysics, AppliedPhysics, Condensed MatterChemistryScience & Technology - Other TopicsMaterials SciencePhysicsELECTRONIC-STRUCTUREHYDROGENRESONANCESNANOPARTICLESBRONZESMOO3FUNCTIONALIZATIONIMMOBILIZATIONAPPROXIMATIONMODULATION
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