Journal
ACS APPLIED NANO MATERIALS
Volume 5, Issue 2, Pages 1-5Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.1c04310
Keywords
magnetoplasmonic nanostructures; hyperbolic nanostructures; plasmonic biosensing; nanogratings; TMOKE
Funding
- COLCIENCIAS [848]
- RNP
- MCTIC under the Brazil 6G project of the Radiocommunication Reference Center (Centro de Referencia em Radiocomunicacoes) of the National Institute of Telecommunications (Instituto Nacional de Telecomunicacoes, Inatel), Brazil [01245.010604/2020-14]
- National Council for Scientific and Technological Development-CNPq [429496/2018-4, 305958/2018-6]
- FAPESP [2018/22214-6, 2021/06946-0]
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We propose a concept for highly integrated magnetoplasmonic biosensors using nanostructured magnetooptical hyperbolic metamaterials. By utilizing enhanced amplitudes of ultranarrow peaks and bulk plasmon polariton modes in HMMs, we achieve improved figure of merit and resolution detection for low-molecular-weight analytes.
We demonstrate numerically a concept for highly integrated magnetoplasmonic biosensors made with nanostruc-tured magnetooptical (MO) hyperbolic metamaterials (HMMs). The concept is based on the use of enhanced amplitudes of ultranarrow peaks of the transverse magnetooptical Kerr effect (TMOKE). In contrast to conventional magnetoplasmonic trans-ducers that employ wide surface plasmon resonances, we use bulk plasmon polariton modes in HMMs. In sensing through changes in the refractive index of water, a figure of merit on the order of 8 x 10(2) was observed, to be compared with 590 for non-MO HMMs. This allows for improved resolution detection of low-molecular-weight analytes at concentrations on the order of picomolar.
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