Abstract
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 [] of at least 380, 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 , clearly smaller than the diffraction limit of . Importantly, we show this subdiffraction imaging is due to the resonant excitation of surface slab modes.
- Received 16 November 2007
DOI:https://doi.org/10.1103/PhysRevLett.100.187401
©2008 American Physical Society