Harmonic light-generating metasurface

A method of manufacturing a harmonic light-generating metasurface, the method comprising:

• disposing a film of nonlinear material on a side of a substrate;
• patterning the film to create a plurality of structures on a surface of the base substrate, wherein
• each structure of the plurality of structures individually supports a magnetic dipole mode, and
• an electromagnetic field enhancement of the magnetic dipole mode induces generation of a second harmonic signal by the plurality of structures.

A harmonic light-generating metasurface, comprising:

• a base substrate;
• a supporting substrate comprising a nonlinear material;
• and
• a plurality of paired structures disposed in a pattern on a surface of the supporting substrate, wherein
• each paired structure, of the plurality of paired structures, collectively supports a toroidal dipole mode, and
• an electromagnetic field enhancement of the toroidal dipole mode penetrates the supporting substrate to induce generation of a harmonic signal by the supporting substrate.

A method of manufacturing a harmonic light-generating metasurface, the method comprising:

• disposing a supporting substrate comprising a nonlinear material on a base substrate;
• and
• patterning a plurality of paired structures on a surface of the supporting substrate, wherein
• each paired structure, of the plurality of paired structures, collectively supports a toroidal dipole mode, and
• an electromagnetic field enhancement of the toroidal dipole mode penetrates the supporting substrate to induce generation of a harmonic signal by the supporting substrate.