Design and analysis of metal/multi-insulator/metal waveguide plasmonic Bragg grating | Zendy

Yin-Jung Chang | Zendy

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Design and analysis of metal/multi-insulator/metal waveguide plasmonic Bragg grating

Author(s) -

Yin-Jung Chang

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.013258

Subject(s) - optics , grating , materials science , diffraction , fiber bragg grating , diffraction grating , surface plasmon , plasmon , full width at half maximum , nanophotonics , optoelectronics , physics , laser

A metal/multi-insulator/metal waveguide plasmonic Bragg grating with a large dynamic range of index modulation is investigated analytically and numerically. Theoretical formalism of the dispersion relation for the present and general one-dimensional gratings is developed for TMwaves in the vicinity of each stop band.Wide-band and narrow-band designs with their respective FWHM bandwidths of 173.4 nm and < 3.4 nm in the 1550 nm band using a grating length of <16.0 microm are numerically demonstrated. Time-average power vortexes near the silica-silicon interfaces are revealed in the stop band and are attributed to the contra-flow interaction and simultaneous satisfactions of the Bragg condition for the incident and backward-diffracted waves. An enhanced forward-propagating power is thus shown to occur over certain sections within one period due to the power coupling from the backward-diffracted waves.

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