# High-Q Fano metasurfaces

Fano metasurfaces are composed of asymmetric structures, such as metallic or dielectric resonators, that enable the constructive and destructive interference of scattered waves. This results in a sharp and asymmetric resonant response, which is known as Fano resonance.

Fano metasurfaces have potential applications in various areas, such as sensing, imaging, and communication. They can be used to enhance the performance of sensors and detectors by improving their sensitivity and selectivity. They can also be used to design compact optical devices, such as filters and modulators, with high efficiency and narrow bandwidth.

In this example, we reproduce the findings of Campione et al. (2016) (opens new window). The paper investigates the resonances of Germanium structures by measuring their transmission spectrum under varying geometric parameters. A different commercial finite-difference time-domain software, which matches the result from Tidy3D.

To do this calculation, we use a broadband pulse and frequency monitor to measure the flux on the opposite side of the structure.

To view the full example in Python, please click here (opens new window).

To view the example in our web GUI, please click here (opens new window).