Achieving sub-diffraction imaging through bound surface states in negative-refracting photonic crystals at the near-infrared
Optics
2009-11-13 v1
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.
Keywords
Cite
@article{arxiv.0803.0986,
title = {Achieving sub-diffraction imaging through bound surface states in negative-refracting photonic crystals at the near-infrared},
author = {R. Chatterjee and N. C. Panoiu and K. Liu and Z. Dios and M. B. Yu and M. T. Doan and L. J. Kaufman and R. M. Osgood and C. W. Wong},
journal= {arXiv preprint arXiv:0803.0986},
year = {2009}
}