Surface optical sensitivity enhanced by a single dielectric microsphere
Single dielectric microspheres can manipulate light focusing and collection to enhance optical interaction with surfaces. To demonstrate this principle, we experimentally investigate the enhancement of the Raman signal collected by a single dielectric microsphere, with a radius much larger than the exciting laser spot size, residing on the sample surface. The absolute microsphere-assisted Raman signal from a single graphene layer measured in air is more than a factor of two higher than that obtained with a high numerical aperture objective. Results from Mie's theory are used to benchmark numerical simulations and an analytical model to describe the isolated microsphere focusing properties. The analytical model and the numerical simulations justify the Raman signal enhancement measured in the microsphere-assisted Raman spectroscopy experiments.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:30 |
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| Enthalten in: |
Optics express - 30(2022), 24 vom: 21. Nov., Seite 43021-43036 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Ruzankina, Iuliia [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 16.12.2022 Date Revised 21.12.2022 published: Print Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1364/OE.472720 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM350349312 |
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| 520 | |a Single dielectric microspheres can manipulate light focusing and collection to enhance optical interaction with surfaces. To demonstrate this principle, we experimentally investigate the enhancement of the Raman signal collected by a single dielectric microsphere, with a radius much larger than the exciting laser spot size, residing on the sample surface. The absolute microsphere-assisted Raman signal from a single graphene layer measured in air is more than a factor of two higher than that obtained with a high numerical aperture objective. Results from Mie's theory are used to benchmark numerical simulations and an analytical model to describe the isolated microsphere focusing properties. The analytical model and the numerical simulations justify the Raman signal enhancement measured in the microsphere-assisted Raman spectroscopy experiments | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Mukhin, Nikolay |e verfasserin |4 aut | |
| 700 | 1 | |a Mermoul, Ali |e verfasserin |4 aut | |
| 700 | 1 | |a Parfenov, Vadim |e verfasserin |4 aut | |
| 700 | 1 | |a Fron, Eduard |e verfasserin |4 aut | |
| 700 | 1 | |a Ferrini, Gabriele |e verfasserin |4 aut | |
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