Microlens hollow-core fiber probes for operando raman spectroscopy
Microlens hollow-core fiber probes for operando raman spectroscopy
We introduce a flexible microscale all-fiber-optic Raman probe which can be embedded into devices to enable operando in situ spectroscopy. The facile-constructed probe is composed of a nested antiresonant nodeless hollow-core fiber combined with an integrated high refractive index barium titanate microlens. Pump laser 785 nm excitation and near-infrared collection are independently characterized, demonstrating an excitation spot of full-width-half-maximum 1.1 μm. Since this is much smaller than the effective collection area, it has the greatest influence on the collected Raman scattering. Our characterization scheme provides a suitable protocol for testing the efficacy of these fiber probes using various combinations of fiber types and microspheres. Raman measurements on a surface-enhanced Raman spectroscopy sample and a copper battery electrode demonstrate the viability of the fiber probe as an alternative to bulk optic Raman microscopes, giving comparable collection to a 10 objective, thus paving the way for operando Raman studies in applications such as lithium battery monitoring.
Raman, fiber probe, hollow-core fiber, in situ, microlens, photonic nanojet
3167-3177
Groom, Mega J.
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Miele, Ermanno
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Pinnell, Jonathan
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Ellis, Matthew G.
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McConnell, Jessica B.
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Sakr, Hesham
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Jasion, Gregory
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Davidson, Ian
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Wheeler, Natalie
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Jung, Yongmin
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Poletti, Francesco
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Menkin, Svetlana
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Kamp, Marlous
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Baumberg, Jeremy J.
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Euser, Tijmen G.
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21 August 2024
Groom, Mega J.
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Miele, Ermanno
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Pinnell, Jonathan
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Ellis, Matthew G.
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McConnell, Jessica B.
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Sakr, Hesham
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Jasion, Gregory
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Davidson, Ian
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Wheeler, Natalie
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Jung, Yongmin
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Poletti, Francesco
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Menkin, Svetlana
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Kamp, Marlous
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Baumberg, Jeremy J.
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Euser, Tijmen G.
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Groom, Mega J., Miele, Ermanno, Pinnell, Jonathan, Ellis, Matthew G., McConnell, Jessica B., Sakr, Hesham, Jasion, Gregory, Davidson, Ian, Wheeler, Natalie, Jung, Yongmin, Poletti, Francesco, Menkin, Svetlana, Kamp, Marlous, Baumberg, Jeremy J. and Euser, Tijmen G.
(2024)
Microlens hollow-core fiber probes for operando raman spectroscopy.
ACS Photonics, 11 (8), .
(doi:10.1021/acsphotonics.4c00525).
Abstract
We introduce a flexible microscale all-fiber-optic Raman probe which can be embedded into devices to enable operando in situ spectroscopy. The facile-constructed probe is composed of a nested antiresonant nodeless hollow-core fiber combined with an integrated high refractive index barium titanate microlens. Pump laser 785 nm excitation and near-infrared collection are independently characterized, demonstrating an excitation spot of full-width-half-maximum 1.1 μm. Since this is much smaller than the effective collection area, it has the greatest influence on the collected Raman scattering. Our characterization scheme provides a suitable protocol for testing the efficacy of these fiber probes using various combinations of fiber types and microspheres. Raman measurements on a surface-enhanced Raman spectroscopy sample and a copper battery electrode demonstrate the viability of the fiber probe as an alternative to bulk optic Raman microscopes, giving comparable collection to a 10 objective, thus paving the way for operando Raman studies in applications such as lithium battery monitoring.
Text
groom-et-al-2024-microlens-hollow-core-fiber-probes-for-operando-raman-spectroscopy
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More information
Accepted/In Press date: 5 July 2024
e-pub ahead of print date: 22 July 2024
Published date: 21 August 2024
Keywords:
Raman, fiber probe, hollow-core fiber, in situ, microlens, photonic nanojet
Identifiers
Local EPrints ID: 496820
URI: http://eprints.soton.ac.uk/id/eprint/496820
ISSN: 2330-4022
PURE UUID: 44474eef-7392-47b1-9c26-dce63d1e7c99
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Date deposited: 08 Jan 2025 07:15
Last modified: 22 Aug 2025 02:04
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Contributors
Author:
Mega J. Groom
Author:
Ermanno Miele
Author:
Jonathan Pinnell
Author:
Matthew G. Ellis
Author:
Jessica B. McConnell
Author:
Hesham Sakr
Author:
Gregory Jasion
Author:
Ian Davidson
Author:
Natalie Wheeler
Author:
Yongmin Jung
Author:
Francesco Poletti
Author:
Svetlana Menkin
Author:
Marlous Kamp
Author:
Jeremy J. Baumberg
Author:
Tijmen G. Euser
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