In:
PLOS ONE, Public Library of Science (PLoS), Vol. 18, No. 8 ( 2023-8-10), p. e0284058-
Abstract:
We report a waveguide-enhanced Raman spectroscopy (WERS) platform with alignment-tolerant under-chip grating input coupling. The demonstration is based on a 100-nm thick planar (slab) tantalum pentoxide (Ta 2 O 5 ) waveguide and the use of benzyl alcohol (BnOH) and its deuterated form (d7- BnOH) as reference analytes. The use of grating couplers simplifies the WERS system by providing improved translational alignment tolerance, important for disposable chips, as well as contributing to improved Raman conversion efficiency. The use of non-volatile, non-toxic BnOH and d7-BnOH as chemical analytes results in easily observable shifts in the Raman vibration lines between the two forms, making them good candidates for calibrating Raman systems. The design and fabrication of the waveguide and grating couplers are described, and a discussion of further potential improvements in performance is presented.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0284058
DOI:
10.1371/journal.pone.0284058.g001
DOI:
10.1371/journal.pone.0284058.g002
DOI:
10.1371/journal.pone.0284058.g003
DOI:
10.1371/journal.pone.0284058.g004
DOI:
10.1371/journal.pone.0284058.g005
DOI:
10.1371/journal.pone.0284058.g006
DOI:
10.1371/journal.pone.0284058.g007
DOI:
10.1371/journal.pone.0284058.t001
DOI:
10.1371/journal.pone.0284058.s001
DOI:
10.1371/journal.pone.0284058.r001
DOI:
10.1371/journal.pone.0284058.r002
DOI:
10.1371/journal.pone.0284058.r003
DOI:
10.1371/journal.pone.0284058.r004
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2023
detail.hit.zdb_id:
2267670-3
Permalink