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 refe...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2023-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0284058 |
| _version_ | 1827376838380355584 |
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| author | Mohamed A Ettabib Bethany M Bowden Zhen Liu Almudena Marti Glenn M Churchill James C Gates Michalis N Zervas Philip N Bartlett James S Wilkinson |
| author_facet | Mohamed A Ettabib Bethany M Bowden Zhen Liu Almudena Marti Glenn M Churchill James C Gates Michalis N Zervas Philip N Bartlett James S Wilkinson |
| author_sort | Mohamed A Ettabib |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-08T12:29:37Z |
| format | Article |
| id | doaj.art-c9845ffb0ed14c609b3a1aa994fe3064 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-03-08T12:29:37Z |
| publishDate | 2023-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-c9845ffb0ed14c609b3a1aa994fe30642024-01-22T05:31:12ZengPublic Library of Science (PLoS)PLoS ONE1932-62032023-01-01188e028405810.1371/journal.pone.0284058Grating-incoupled waveguide-enhanced Raman sensor.Mohamed A EttabibBethany M BowdenZhen LiuAlmudena MartiGlenn M ChurchillJames C GatesMichalis N ZervasPhilip N BartlettJames S WilkinsonWe 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.https://doi.org/10.1371/journal.pone.0284058 |
| spellingShingle | Mohamed A Ettabib Bethany M Bowden Zhen Liu Almudena Marti Glenn M Churchill James C Gates Michalis N Zervas Philip N Bartlett James S Wilkinson Grating-incoupled waveguide-enhanced Raman sensor. PLoS ONE |
| title | Grating-incoupled waveguide-enhanced Raman sensor. |
| title_full | Grating-incoupled waveguide-enhanced Raman sensor. |
| title_fullStr | Grating-incoupled waveguide-enhanced Raman sensor. |
| title_full_unstemmed | Grating-incoupled waveguide-enhanced Raman sensor. |
| title_short | Grating-incoupled waveguide-enhanced Raman sensor. |
| title_sort | grating incoupled waveguide enhanced raman sensor |
| url | https://doi.org/10.1371/journal.pone.0284058 |
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