Open AccessTunable narrowband plasmonic light emission from metallic crossed surface relief gratings
Author(s) -
Ethan Diak,
Mahyar Mazloumi,
Ribal Georges Sabat
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.414215
Subject(s) - materials science , optics , transmittance , plasmon , polarizer , surface plasmon resonance , optoelectronics , surface plasmon , grating , interference lithography , wavelength , diffraction grating , surface plasmon polariton , fabrication , nanoparticle , nanotechnology , medicine , physics , birefringence , alternative medicine , pathology
Plasmonic crossed surface relief gratings were fabricated using interference lithography. Their topographies were studied by AFM as a function of laser exposure time and their surface plasmon resonance at a gold-air interface was measured between crossed polarizers in transmission and in reflection modes. Both modes resulted in emitted plasmonic light at specific wavelengths related to the grating pitch, with the reflectance SPR having a much higher intensity than the transmittance SPR. The use of these gratings as plasmonic sensors was examined and their sensitivities were measured in the reflectance and transmittance modes to be 601 nm/RIU and 589 nm/RIU, respectively.