Phys. Rev. Lett. 100, 187401 (2008) [4 pages]Achieving Subdiffraction Imaging through Bound Surface States in Negative Refraction Photonic Crystals in the Near-Infrared RangeReceived 16 November 2007; published 5 May 2008 We report the observation of imaging beyond the diffraction limit due to bound surface states in negative refraction photonic crystals. We achieve an effective negative index figure of merit [-Re(n)/Im(n)] of at least 380, ∼125× improvement over recent efforts in the near-infrared range, with a 0.4 THz bandwidth. Supported by numerical and theoretical analyses, the observed near-field resolution is 0.47λ, clearly smaller than the diffraction limit of 0.61λ. Importantly, we show this subdiffraction imaging is due to the resonant excitation of surface slab modes. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.187401
DOI:
10.1103/PhysRevLett.100.187401
PACS:
78.20.Ci, 41.20.Jb, 42.70.Qs, 78.67.−n
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