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Dual-peak sensing with hyperbolic Ag-SiO2 nanodisks
Optics Express
|June 11, 2026
Summary
Hyperbolic nanodisks function as sensitive dual-channel optical sensors. These silver-silica nanostructures demonstrate potential for bio- and environmental monitoring applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Hyperbolic metamaterials (HMMs) possess anisotropic permittivity, enabling tailored light-matter interactions.
- Hyperbolic nanoantennas support distinct electric dipole and coupled magnetic dipole-electric quadrupole modes.
Purpose of the Study:
- To investigate optical HMM nanodisks as efficient, dual-channel optical sensors.
- To design a sensitive and easily fabricated HMM nanosensor with tunable resonances.
Main Methods:
- Numerical design and simulation of silver-silica multilayer HMM nanodisks.
- Fabrication using hole-mask colloidal lithography for amorphous arrays.
- Sensitivity measurements to validate numerical models.
Main Results:
- Designed HMM nanodisks exhibit high sensitivity in dual detectable resonances.
- Amorphous/random arrays ensure spectral separation and maximize sensitivity.
- Fabricated nanodisks show good qualitative agreement with simulations.
Conclusions:
- Hyperbolic nanodisks are promising dual-band refractometric sensors.
- These sensors have potential applications in bio- and environmental monitoring.
