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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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Inverse-Designed Metaphotonics for Hypersensitive Detection.

Maxim Elizarov¹, Yuri S Kivshar^2,3, Andrea Fratalocchi¹

¹PRIMALIGHT, Faculty of Electrical Engineering; Applied Mathematics and Computational Science, KAUST, Thuwal 23955-6900, Saudi Arabia.

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Summary

This summary is machine-generated.

Researchers developed novel reflective metaphotonic structures to control nanoscale light flow, overcoming limitations of plasmons and dielectrics. This breakthrough enables ultrahigh refractive index resonators and highly sensitive optical sensors for advanced optoelectronics.

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Area of Science:

Optoelectronics and Nanophotonics
Metamaterials and Nanostructures

Background:

Controlling broadband electromagnetic energy at the nanoscale is crucial for optoelectronics.
Surface plasmon polaritons offer light localization but suffer from high losses.
Dielectric materials lack sufficient response in the visible spectrum for effective light trapping.

Purpose of the Study:

To overcome limitations in nanoscale light control using a novel metaphotonic approach.
To demonstrate the design and realization of components with ultrahigh refractive indices.
To develop highly sensitive optical sensors for various applications.

Main Methods:

Engineered deformed reflective metaphotonic structures with complex geometrical shapes.
Employed inverse design to achieve nondispersive index responses for arbitrary form factors.
Realized resonators with an ultrahigh refractive index (n=100) supporting bound states in the continuum (BIC).

Main Results:

Demonstrated light localization in air using structures with physically accessible refractive index regions.
Designed and reported an optical sensor with two times higher sensitivity than competitors.
Achieved a micrometer footprint for the developed optical sensor.

Conclusions:

Inversely designed reflective metaphotonics provides a flexible platform for broadband light control.
This technology enables the integration of optoelectronics with large bandwidths and miniaturized footprints.
The developed approach offers significant advancements in nanoscale light manipulation and sensing.