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arXiv · 0803.0986

Achieving sub-diffraction imaging through bound surface states in negative-refracting photonic crystals at the near-infrared

R. Chatterjee·N. C. Panoiu·K. Liu·Z. Dios·M. B. Yu·M. T. Doan·L. J. Kaufman·R. M. Osgood·C. W. Wong
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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 [-Re(n)/Im(n)] of at least 380, ~125x improvement over recent efforts in the near-infrared, 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 sub-diffraction imaging is due to the resonant excitation of surface slab modes, allowing refocusing of non-propagating evanescent waves.

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R. Chatterjee, N. C. Panoiu, K. Liu, Z. Dios, M. B. Yu, M. T. Doan, L. J. Kaufman, R. M. Osgood, C. W. Wong. 2008-03-06. Achieving sub-diffraction imaging through bound surface states in negative-refracting photonic crystals at the near-infrared. https://doi.org/10.1103/physrevlett.100.187401

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