Investigation of optical fiber-tip probes for common and ultrafast SERS
In this study, we performed a three-dimensional computational experiment on ultrashort pulse propagation in an optical fiber-tip probe that is decorated with gold nanoparticles (NPs) using a constant structure for the probe’s dielectric taper and different spatial configurations of the gold nanopart...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/ab7bd4 |
| _version_ | 1797750199084384256 |
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| author | Yevhenii M Morozov Anatoliy S Lapchuk Alexander V Prygun Andriy A Kryuchyn Jakub Dostalek |
| author_facet | Yevhenii M Morozov Anatoliy S Lapchuk Alexander V Prygun Andriy A Kryuchyn Jakub Dostalek |
| author_sort | Yevhenii M Morozov |
| collection | DOAJ |
| description | In this study, we performed a three-dimensional computational experiment on ultrashort pulse propagation in an optical fiber-tip probe that is decorated with gold nanoparticles (NPs) using a constant structure for the probe’s dielectric taper and different spatial configurations of the gold nanoparticles. Interestingly, a hot spot with the highest amplitude of the electric field was found not along the same chain of the NPs but between terminal NPs of neighboring chains of NPs at the probe’s tip (the amplitude of the electric field in the hot spots between the NPs along the same chain was of the order of 10 ^1 , while that between terminal NPs of neighboring chains was of the order of 10 ^3 ). We eventually identified a configuration with only six terminal nanoparticles (Config4) which is characterized by the highest electric field amplitude enhancement and can provide the highest spatial resolution in the SERS interrogation of an object of interest. The ultrashort temporal responses of the hot spots for all configurations exhibited relatively high pulse elongation (relative elongation was greater than 4.3%). At the same time, due to the reflection of the incident pulse and consequent interference, the temporal responses of most hot spots contained several peaks for all configurations except for the optimum Config4. Nonetheless, the ultrashort temporal responses of all hot spots for Config4 were characterized by a single peak but with a relatively large pulse elongation (relative elongation was 234.1%). The results indicate that further examination of this new structure of a nanoparticles-coated optical fiber-tip probe with only six terminal NPs may provide attractive characteristics for its practical applications. |
| first_indexed | 2024-03-12T16:30:16Z |
| format | Article |
| id | doaj.art-2abce08956ff4367b7430d91c2876a88 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:30:16Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-2abce08956ff4367b7430d91c2876a882023-08-08T15:32:29ZengIOP PublishingNew Journal of Physics1367-26302020-01-0122303302710.1088/1367-2630/ab7bd4Investigation of optical fiber-tip probes for common and ultrafast SERSYevhenii M Morozov0https://orcid.org/0000-0001-9689-8641Anatoliy S Lapchuk1Alexander V Prygun2Andriy A Kryuchyn3Jakub Dostalek4College of Science, Zhejiang University of Technology , 288 Liuhe Road, 310023 Hangzhou, People’s Republic of China; Institute for Information Recording of NAS of Ukraine, 2 Shpaka Street, 03113 Kiev, UkraineInstitute for Information Recording of NAS of Ukraine, 2 Shpaka Street, 03113 Kiev, UkraineInstitute for Information Recording of NAS of Ukraine, 2 Shpaka Street, 03113 Kiev, UkraineInstitute for Information Recording of NAS of Ukraine, 2 Shpaka Street, 03113 Kiev, UkraineBiosensor Technologies, AIT-Austrian Institute of Technology GmbH, 24 Konrad-Lorenz-Strasse, A-3430 Tulln, AustriaIn this study, we performed a three-dimensional computational experiment on ultrashort pulse propagation in an optical fiber-tip probe that is decorated with gold nanoparticles (NPs) using a constant structure for the probe’s dielectric taper and different spatial configurations of the gold nanoparticles. Interestingly, a hot spot with the highest amplitude of the electric field was found not along the same chain of the NPs but between terminal NPs of neighboring chains of NPs at the probe’s tip (the amplitude of the electric field in the hot spots between the NPs along the same chain was of the order of 10 ^1 , while that between terminal NPs of neighboring chains was of the order of 10 ^3 ). We eventually identified a configuration with only six terminal nanoparticles (Config4) which is characterized by the highest electric field amplitude enhancement and can provide the highest spatial resolution in the SERS interrogation of an object of interest. The ultrashort temporal responses of the hot spots for all configurations exhibited relatively high pulse elongation (relative elongation was greater than 4.3%). At the same time, due to the reflection of the incident pulse and consequent interference, the temporal responses of most hot spots contained several peaks for all configurations except for the optimum Config4. Nonetheless, the ultrashort temporal responses of all hot spots for Config4 were characterized by a single peak but with a relatively large pulse elongation (relative elongation was 234.1%). The results indicate that further examination of this new structure of a nanoparticles-coated optical fiber-tip probe with only six terminal NPs may provide attractive characteristics for its practical applications.https://doi.org/10.1088/1367-2630/ab7bd4femtosecond pulsegold nanoparticlesoptical fiber-tip probesurface-enhanced Raman spectroscopytemporal responseultrafast nanophotonics |
| spellingShingle | Yevhenii M Morozov Anatoliy S Lapchuk Alexander V Prygun Andriy A Kryuchyn Jakub Dostalek Investigation of optical fiber-tip probes for common and ultrafast SERS New Journal of Physics femtosecond pulse gold nanoparticles optical fiber-tip probe surface-enhanced Raman spectroscopy temporal response ultrafast nanophotonics |
| title | Investigation of optical fiber-tip probes for common and ultrafast SERS |
| title_full | Investigation of optical fiber-tip probes for common and ultrafast SERS |
| title_fullStr | Investigation of optical fiber-tip probes for common and ultrafast SERS |
| title_full_unstemmed | Investigation of optical fiber-tip probes for common and ultrafast SERS |
| title_short | Investigation of optical fiber-tip probes for common and ultrafast SERS |
| title_sort | investigation of optical fiber tip probes for common and ultrafast sers |
| topic | femtosecond pulse gold nanoparticles optical fiber-tip probe surface-enhanced Raman spectroscopy temporal response ultrafast nanophotonics |
| url | https://doi.org/10.1088/1367-2630/ab7bd4 |
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