Achieving subdiffraction imaging through bound surface states in negative refraction photonic crystals in the near-infrared range

作者：Chatterjee R^*; Panoiu N C; Liu K; Dios Z; Yu M B; Doan M T; Kaufman L J; Osgood R M; Wong C W

来源：Physical Review Letters, 2008, 100(18): 187401.

DOI：10.1103/PhysRevLett.100.187401

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, similar to 125x 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 0.47 lambda, clearly smaller than the diffraction limit of 0.61 lambda. Importantly, we show this subdiffraction imaging is due to the resonant excitation of surface slab modes.

• 出版日期2008-5-9