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Sensors 2010, 10(9), 8751-8760; doi:10.3390/s100908751
Article

Characteristics of Metal Enhanced Evanescent-Wave Microcavities

Received: 27 July 2010; in revised form: 9 September 2010 / Accepted: 10 September 2010 / Published: 21 September 2010
(This article belongs to the Special Issue Optical Resonant Microsensors)
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Abstract: This article presents the concept of storing optical energy using a metallic air gap microcavity. Evanescent waves are stored in the air gap of a dielectric/metal/air gap/metal planar microcavity. For an air gap with a micron scale distance between the two metals, incident light excites the optical interface modes on the two metal-air interfaces simultaneously, being accompanied by enhanced evanescent fields. Numerical simulations show that the reflected light depends remarkably upon distributions of the enhanced electric fields in the air-gap at the optical mode excitations. The metallic microcavities have a Q value on the order of 102, as determined from calculations. Experimentally, a small mechanical variation of the air-gap distance exhibited a change of reflectivity.
Keywords: resonant microcavity; evanescent wave; optical interface mode; light modulation resonant microcavity; evanescent wave; optical interface mode; light modulation
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Wakamatsu, T. Characteristics of Metal Enhanced Evanescent-Wave Microcavities. Sensors 2010, 10, 8751-8760.

AMA Style

Wakamatsu T. Characteristics of Metal Enhanced Evanescent-Wave Microcavities. Sensors. 2010; 10(9):8751-8760.

Chicago/Turabian Style

Wakamatsu, Takashi. 2010. "Characteristics of Metal Enhanced Evanescent-Wave Microcavities." Sensors 10, no. 9: 8751-8760.


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