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High index contrast photonic platforms for on-chip Raman spectroscopy

High index contrast photonic platforms for on-chip Raman spectroscopy
High index contrast photonic platforms for on-chip Raman spectroscopy
Nanophotonic waveguide enhanced Raman spectroscopy (NWERS) is a sensing technique that uses a highly confined waveguide mode to excite and collect the Raman scattered signal from molecules in close vicinity of the waveguide. The most important parameters defining the figure of merit of an NWERS sensor include its ability to collect the Raman signal from an analyte, i.e. “the Raman conversion efficiency” and the amount of “Raman background” generated from the guiding material. Here, we compare different photonic integrated circuit (PIC) platforms capable of on-chip Raman sensing in terms of the aforementioned parameters. Among the four photonic platforms under study, tantalum oxide and silicon nitride waveguides exhibit high signal collection efficiency and low Raman background. In contrast, the performance of titania and alumina waveguides suffers from a strong Raman background and a weak signal collection efficiency, respectively.
1094-4087
23067-23079
Ali, H. Raza
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Clemmen, Stephane
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Wuytens, Pieter
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de Goede, Michiel
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Tong, Amy Sen Kay
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Le Thomas, Nicolas
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Liu, Chengyu
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Suntivich, Jin
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Skirtach, Andre G.
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García-Blanco, Sonia M.
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Blumenthal, Daniel J.
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Wilkinson, James S.
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Baets, Roel
bf3937de-a54f-4eb5-83d3-39c3cecd4f30
Ali, H. Raza
4249d1bb-f687-4b7b-b20e-28d97b6c3909
Clemmen, Stephane
1eaabe63-22b8-43b3-afea-02359d79d8dc
Wuytens, Pieter
0348bc0a-0d52-41bf-8ec7-906174e561e3
de Goede, Michiel
b8ee9fb1-d028-40d4-9b62-17462207be77
Tong, Amy Sen Kay
cc6ac738-a365-4ea3-a979-67dd4fb7392a
Le Thomas, Nicolas
d5172ce2-074c-4975-9696-302a365d9740
Liu, Chengyu
ab7cb9e7-e2f4-4728-98d3-337b018ed311
Suntivich, Jin
e47e2070-4b6d-4556-9f05-d0199b05ef7b
Skirtach, Andre G.
2400f616-7eff-4cbb-8537-c8f41e99bc55
García-Blanco, Sonia M.
fceca377-1318-4554-af33-a89fd234b2c0
Blumenthal, Daniel J.
a9423eb9-0fe8-4ec5-a5dd-cf0e2a5290ca
Wilkinson, James S.
73483cf3-d9f2-4688-9b09-1c84257884ca
Baets, Roel
bf3937de-a54f-4eb5-83d3-39c3cecd4f30

Ali, H. Raza, Clemmen, Stephane, Wuytens, Pieter, de Goede, Michiel, Tong, Amy Sen Kay, Le Thomas, Nicolas, Liu, Chengyu, Suntivich, Jin, Skirtach, Andre G., García-Blanco, Sonia M., Blumenthal, Daniel J., Wilkinson, James S. and Baets, Roel (2019) High index contrast photonic platforms for on-chip Raman spectroscopy. Optics Express, 27 (16), 23067-23079. (doi:10.1364/OE.27.023067).

Record type: Article

Abstract

Nanophotonic waveguide enhanced Raman spectroscopy (NWERS) is a sensing technique that uses a highly confined waveguide mode to excite and collect the Raman scattered signal from molecules in close vicinity of the waveguide. The most important parameters defining the figure of merit of an NWERS sensor include its ability to collect the Raman signal from an analyte, i.e. “the Raman conversion efficiency” and the amount of “Raman background” generated from the guiding material. Here, we compare different photonic integrated circuit (PIC) platforms capable of on-chip Raman sensing in terms of the aforementioned parameters. Among the four photonic platforms under study, tantalum oxide and silicon nitride waveguides exhibit high signal collection efficiency and low Raman background. In contrast, the performance of titania and alumina waveguides suffers from a strong Raman background and a weak signal collection efficiency, respectively.

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Accepted/In Press date: 21 June 2019
e-pub ahead of print date: 29 July 2019

Identifiers

Local EPrints ID: 433071
URI: http://eprints.soton.ac.uk/id/eprint/433071
ISSN: 1094-4087
PURE UUID: 80303a27-0995-4ff4-804a-396645eddb17
ORCID for Amy Sen Kay Tong: ORCID iD orcid.org/0000-0002-2026-2062
ORCID for James S. Wilkinson: ORCID iD orcid.org/0000-0003-4712-1697

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Date deposited: 07 Aug 2019 16:30
Last modified: 18 Feb 2021 16:32

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