Abstract.
Finite-difference time-domain (FDTD) analysis of light propagation in a defect mode of a two-dimensional photonic band-gap (PBG) structure demonstrates that the light field is localized in such a structure within areas with subwavelength (λ/10) sizes. FDTD simulations reveal efficient formation of an evanescent wave at the output of such a PBG structure, permitting the subwavelength resolution to be achieved in the near field. A probe object with a size less than the wavelength of incident light is shown to perturb the near-field distribution behind the PBG structure and to change the signal detected in the far-field zone. The field intensity distribution inside a PBG structure is also sensitive to the presence of a probe object, offering a way to control the light field localized in defect modes of PBG structures.
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Received: 9 August 1999 / Accepted: 18 October 1999 / Published online: 10 November 1999
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Magnitskii, S., Tarasishin, A. & Zheltikov, A. Near-field optics with photonic crystals. Appl Phys B 69, 497–500 (1999). https://doi.org/10.1007/s003400050841
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DOI: https://doi.org/10.1007/s003400050841