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Near-field light generating element comprising surface plasmon antenna with surface or edge opposed to waveguide
Near-field light generating element comprising surface plasmon antenna with surface or edge opposed to waveguide
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机译:包括表面等离子体激元的近场光产生元件,该表面等离子体激元的表面或边缘与波导相对
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摘要
Provided is a near-field light generating element in which reduced is the propagation loss of excited surface plasmon that propagates to the near-field light generating end. The element comprises: a waveguide through which light for exciting surface plasmon propagates; and a plasmon antenna comprising a near-field light generating end and a propagation surface or edge. The propagation surface or edge extends to the near-field light generating end, and causes surface plasmon excited by the light to propagate thereon. Further, a portion of the side surface on the near-field light generating end side is opposed to the propagation surface or edge with a predetermined distance so as for the light to be coupled with the plasmon antenna in a surface plasmon mode. In this configuration, surface plasmon can propagates without significantly changing its wavenumber, which leads to a less propagation loss, and to an improved light use efficiency.
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