Ultrasensitive surface refractive index imaging in all-dielectric structures

Silvia Romano; Maria Mangini; Erika Penzo; Stefano Cabrini; Anna Chiara De Luca; Ivo Rendina; Vito Mocella; Gianluigi Zito

doi:10.1117/12.2589831

18 April 2021 Ultrasensitive surface refractive index imaging in all-dielectric structures

Silvia Romano, Maria Mangini, Erika Penzo, Stefano Cabrini, Anna Chiara De Luca, Ivo Rendina, Vito Mocella, Gianluigi Zito

Author Affiliations +

Proceedings Volume 11772, Optical Sensors 2021; 117720Y (2021) https://doi.org/10.1117/12.2589831
Event: SPIE Optics + Optoelectronics, 2021, Online Only

Abstract

A novel hyperspectral sensing imaging taking advantage of engineered all-dielectric metasurfaces supporting bound states in the continuum here is discussed. This approach combines surface-enhanced fluorescence and res- onant shift both based on high-Q resonances in proximity of bound states in the continuum. The amplification of the optical field on resonance allows increasing the fluorescence emission of a dye as a function of the spatial- variant dielectric environment in the near-field of the structure. We first demonstrate the fluorescence emission amplification by resonant pump matching in microscopy configuration. Then, we take advantage of Fano reso- nances in the fluorescence emission to map the spatially variant environment of biological cells. To demonstrate the real implementation of the proposed BIC-enhanced imaging as a platform for biosensing, hyperspectral maps of prostate cancer cells are experimentally reconstructed.

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Citation Download Citation

Silvia Romano, Maria Mangini, Erika Penzo, Stefano Cabrini, Anna Chiara De Luca, Ivo Rendina, Vito Mocella, and Gianluigi Zito "Ultrasensitive surface refractive index imaging in all-dielectric structures", Proc. SPIE 11772, Optical Sensors 2021, 117720Y (18 April 2021); https://doi.org/10.1117/12.2589831

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