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Opt Express. 2010 May 24;18(11):11589-98. doi: 10.1364/OE.18.011589.

Characteristics of plasmonic Bragg reflectors with insulator width modulated in sawtooth profiles.

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  • 1Department of Electrical and Computer Engineering, Iowa State University, Ames, IA 50011, USA.


We present a new metal-insulator-metal (MIM)-based plasmonic Bragg reflector (PBR) design that solves the technical problems of conventional step profile MIM PBRs through the use of sawtooth profiles. Our numerical study revealed that the sawtooth PBRs exhibit lower insertion loss, narrower bandgap, and reduced rippling in the transmission spectrum when compared with the step PBRs. The defect mode of the sawtooth PBR also exhibits a higher transmission, narrower linewidth, and higher Q-factor.

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