Journal
PHYSICAL REVIEW LETTERS
Volume 112, Issue 13, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.112.135502
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Funding
- KAKENHI [25600109, 20104002]
- Nanotechnology Platform [12024046]
- Project for Developing Innovation Systems of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- JSPS
- Photon Frontier Network Program
- Grants-in-Aid for Scientific Research [25600109] Funding Source: KAKEN
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The discrete rotational symmetry of nanostructures provides a powerful and simple guiding principle for designing the second-harmonic generation process in nonlinear metamaterials. We demonstrate that, in achiral nanostructures with threefold rotational symmetries, a circularly polarized fundamental beam produces a countercircularly polarized second-harmonic beam. In this case, the polarization state of the second harmonic is determined in a very simple manner. We also demonstrate how rotational symmetries in nonlinear metamaterials manifest themselves in SHG selection rules.
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