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Quasi-bound states in the continuum in all-dielectric metasurface towards biosensing
Publikationstyp
Conference Paper
Date Issued
2021
Sprache
English
Author(s)
Start Page
1601
End Page
1602
Citation
25th International Conference on Miniaturized Systems for Chemistry and Life Sciences, Microtas 2021
Contribution to Conference
Scopus ID
We demonstrate an all-dielectric crescent metasurface made of sub-wavelength silicon meta-atoms, realizing the recently introduced new physics of quasi-bound states in the continuum (quasi-BIC). The crescent metasurface supports a fundamental quasi-BIC together with a higher-order resonance with arbitrarily tunable quality factors and enhanced electromagnetic fields near the resonator surface via finely tailoring the geometry of the crescent shape. Thanks to these unique properties, such a metasurface can serve as an optical label-free sensor for multiplexed bioassays with high sensitivity and low detection limit with the potential for integrating microfluidics for in-situ on chip detection.
Subjects
All-dielectric metasurface
Bound states in the continuum
Higher-order resonance
Optical sensor
Sensitivity
DDC Class
620: Engineering