Publications by authors named "Zachary T Brawley"

Nanostructured plasmonic surfaces allow for precise tailoring of electromagnetic modes within sub-diffraction mode volumes, boosting light-matter interactions. This study explores vibrational strong coupling (VSC) between molecular ensembles and subradiant "dark" cavities that support infrared quadrupolar plasmonic resonances (QPLs). The QPL mode exhibits a dispersion characteristic of bound states in the continuum (BIC).

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Article Synopsis
  • Researchers are exploring how vibrational strong coupling between molecules and plasmonic optical cavities can influence chemical reactions through enhanced vibrational responses.
  • They have developed a new plasmonic nanodisk substrate that effectively couples with all molecules on its surface, independent of their orientation, overcoming traditional limitations of optical cavities.
  • The study demonstrates strong coupling between the nanodisk and specific vibrational modes of different materials, suggesting potential for controlling chemical processes by targeting multiple vibrational modes at once.
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This work studies the effect of a plasmonic array structure coupled with thin film oxide substrate layers on optical surface enhancement using a finite element method. Previous results have shown that as the nanowire spacing increases in the sub-100 nm range, enhancement decreases; however, this work improves upon previous results by extending the range above 100 nm. It also averages optical enhancement across the entire device surface rather than localized regions, which gives a more practical estimate of the sensor response.

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This work investigates a new design for a plasmonic SERS biosensor via computational electromagnetic models. It utilizes a dual-width plasmonic grating design, which has two different metallic widths per grating period. These types of plasmonic gratings have shown larger optical enhancement than standard single-width gratings.

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