Grating-incoupled waveguide-enhanced Raman sensor
Grating-incoupled waveguide-enhanced Raman sensor
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 (Ta2O5) 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.
Ettabib, Mohamed A.
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Bowden, Bethany M.
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Liu, Zhen
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Marti, Almudena
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Churchill, Glenn M.
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Gates, James C.
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Zervas, Michalis N.
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Bartlett, Philip N.
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Wilkinson, James S.
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August 2023
Ettabib, Mohamed A.
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Bowden, Bethany M.
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Liu, Zhen
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Marti, Almudena
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Churchill, Glenn M.
5933a331-fba3-444b-8352-273112c3d6a6
Gates, James C.
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Zervas, Michalis N.
1840a474-dd50-4a55-ab74-6f086aa3f701
Bartlett, Philip N.
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Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Ettabib, Mohamed A., Bowden, Bethany M., Liu, Zhen, Marti, Almudena, Churchill, Glenn M., Gates, James C., Zervas, Michalis N., Bartlett, Philip N. and Wilkinson, James S.
(2023)
Grating-incoupled waveguide-enhanced Raman sensor.
PLoS ONE, 18 (8), [e0284058].
(doi:10.1371/journal.pone.0284058).
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 (Ta2O5) 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.
Text
journal.pone.0284058
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More information
Accepted/In Press date: 22 March 2023
e-pub ahead of print date: 10 August 2023
Published date: August 2023
Additional Information:
Funding Information:
This work was funded by a grant from the UK Engineering and Physical Sciences Research Council (EPSRC), Grant Number EP/R011230/1. B. M.B. thanks the Defence Science and Technology Laboratory (contract no. DSTLX-1000128554) for supporting an EPSRC industrial CASE award. the funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Publisher Copyright:
© 2023 Ettabib et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Local EPrints ID: 485529
URI: http://eprints.soton.ac.uk/id/eprint/485529
ISSN: 1932-6203
PURE UUID: 9baef54f-f23a-4f09-9c48-f0fa7e7490ce
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Date deposited: 08 Dec 2023 17:32
Last modified: 18 Mar 2024 03:32
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Author:
Mohamed A. Ettabib
Author:
Bethany M. Bowden
Author:
Zhen Liu
Author:
Glenn M. Churchill
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