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

ORAL

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, $\sim $125$\times $ 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 resonant excitation of surface slab modes, allowing evanescent wave amplification.

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Authors

  • Rohit Chatterjee

    • Optical Nanostructures Laboratory, Solid-State Science and Mechanical Engineering, Columbia University, New York

  • Nicolae Panoiu

    • Department of Electronic and Electrical Engineering, University College London, London

  • Kai liu

    • Optical Nanostructures Laboratory, Solid-State Science and Mechanical Engineering, Columbia University, New York

  • Zachary Dios

    • Optical Nanostructures Laboratory, Solid-State Science and Mechanical Engineering, Columbia University, New York

  • Ming Bin Yu

    • The Institute of Microelectronics, Singapore

  • My The Doan

    • The Institute of Microelectronics, Singapore

  • Laura Kaufman

    • Department of Chemistry, Columbia University, New York

  • Richard Osgood, Jr.

    • Columbia University
    • Department of Applied Physics and Applied Mathematics, Columbia University, New York

  • Chee Wei Wong

    • Optical Nanostructures Laboratory, Solid-State Science and Mechanical Engineering, Columbia University, New York