Guiding, bending, and splitting of coupled defect surface modes in a surface-wave photonic crystal
We experimentally demonstrate a type of waveguiding mechanism for coupled surface-wave defect modes in a surface-wave photonic crystal. Unlike conventional spoof surface plasmonwaveguides, waveguiding of coupled surface-wave defect modes is achieved through weak coupling between tightly localized de...
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| Main Authors: | , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2016
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/82450 http://hdl.handle.net/10220/40012 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | We experimentally demonstrate a type of waveguiding mechanism for coupled surface-wave defect modes in a surface-wave photonic crystal. Unlike conventional spoof surface plasmonwaveguides, waveguiding of coupled surface-wave defect modes is achieved through weak coupling between tightly localized defectcavities in an otherwise gapped surface-wave photonic crystal, as a classical wave analogue of tight-binding electronic wavefunctions in solid state lattices. Wave patterns associated with the high transmission of coupled defectsurface modes are directly mapped with a near-field microwave scanning probe for various structures including a straight waveguide, a sharp corner, and a T-shaped splitter. These results may find use in the design of integrated surface-wave devices with suppressed crosstalk. |
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