Experimental observation of strong edge effects on the pseudodiffusive transport of light in photonic graphene
Photonic graphene is a two-dimensional photonic crystal structure that is analogous to graphene. We use 5 mm diameter Al2O3 rods placed on a triangular lattice with a lattice constant a=8 mm to create an isolated conical singularity in the photonic band structure at a microwave frequency of 17.6 GHz...
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| Published in: | Physical review letters Vol. 104; no. 4; p. 043903 |
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| Main Authors: | , |
| Format: | Journal Article |
| Language: | English |
| Published: |
United States
29-01-2010
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| Online Access: | Get full text |
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| Summary: | Photonic graphene is a two-dimensional photonic crystal structure that is analogous to graphene. We use 5 mm diameter Al2O3 rods placed on a triangular lattice with a lattice constant a=8 mm to create an isolated conical singularity in the photonic band structure at a microwave frequency of 17.6 GHz. At this frequency, the measured transmission of microwaves through a perfectly ordered structure enters a pseudodiffusive regime where the transmission scales inversely with the thickness L of the crystal (L/a greater than or approximately 5). The transmission depends critically on the configuration of the edges: distinct oscillations with an amplitude comparable to the transmission are observed for structures terminated with zigzag edges, while these oscillations are absent for samples with a straight edge configuration. |
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| Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.1103/physrevlett.104.043903 |