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Proceedings Paper

Plasmonic filter array for on-chip near-infrared spectroscopy
Author(s): Erwen Li; Xinyuan Chong; Fanghui Ren; Alan X. Wang
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Paper Abstract

We demonstrate an ultra-compact on-chip spectrometer for near-infrared (NIR) spectroscopy based on narrow-band band-pass filter array. Each individual filter consists of a plasmonic metallic grating with subwavelength period and extremely narrow slits on a quartz substrate, with a polymer cover layer as the waveguide layer. A narrow-band guided-mode resonance (GMR) associated with a surface-plasmon resonance (SPR) gives rise to the narrow-band transmission spectrum. Full width at half maximum (FWHM) of fabricated filter’s spectrum is measured to be from 7 to 13 nm, and the operation bandwidth of the entire filter array covers wavelength range over 270 nm from 1510 to 1780 nm. We measure the NIR absorbance spectrum of xylene using our filter array device to demonstrate its application as a spectrometer.

Paper Details

Date Published: 22 April 2016
PDF: 7 pages
Proc. SPIE 9724, Plasmonics in Biology and Medicine XIII, 97240I (22 April 2016); doi: 10.1117/12.2214023
Show Author Affiliations
Erwen Li, Oregon State Univ. (United States)
Xinyuan Chong, Oregon State Univ. (United States)
Fanghui Ren, Oregon State Univ. (United States)
Alan X. Wang, Oregon State Univ. (United States)

Published in SPIE Proceedings Vol. 9724:
Plasmonics in Biology and Medicine XIII
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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