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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Area of Science:

  • Materials Science
  • Optics
  • Nanotechnology

Background:

  • Optical metasurfaces are crucial for visible light applications.
  • Gallium phosphide (GaP) possesses desirable optical properties for metasurfaces.
  • Fabrication challenges have limited the use of GaP thin films on transparent substrates.

Purpose of the Study:

  • To design, fabricate, and characterize amorphous GaP metasurfaces.
  • To explore the potential of GaP as a material for visible light optical metasurfaces.
  • To overcome fabrication difficulties associated with GaP thin films.

Main Methods:

  • Sputtering technique used for fabricating amorphous GaP thin films.
  • Development of three distinct amorphous GaP metasurface designs.
  • Characterization of the fabricated metasurfaces for optical performance.

Main Results:

  • Successfully fabricated three types of amorphous GaP metasurfaces.
  • Demonstrated the potential of sputtered GaP for visible light applications.
  • Identified GaP as a viable alternative material for optical metasurfaces.

Conclusions:

  • Amorphous GaP metasurfaces fabricated via sputtering show promise for visible light applications.
  • GaP is a viable alternative material for optical metasurface fabrication.
  • Further optimization of material properties can enhance performance.