Plasmon Response in Individual Conical Silicon Nanowires with Different Lengths
Silicon nanowires (SiNWs) are extensively studied in the scientific community due to their remarkable electrical and optical properties. In our previous studies, we have demonstrated that cylindrical−shaped SiNWs sustain longitudinal plasmon resonances (LPRs) and transverse plasmon resonances (TPRs)...
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| Language: | English |
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MDPI AG
2024-10-01
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| Series: | Photonics |
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| Online Access: | https://www.mdpi.com/2304-6732/11/11/999 |
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| author | Rizwan Rafique Antonino La Magna Antonio Massimiliano Mio Salvatore Patanè Jost Adam Rosaria Anna Puglisi |
| author_facet | Rizwan Rafique Antonino La Magna Antonio Massimiliano Mio Salvatore Patanè Jost Adam Rosaria Anna Puglisi |
| author_sort | Rizwan Rafique |
| collection | DOAJ |
| description | Silicon nanowires (SiNWs) are extensively studied in the scientific community due to their remarkable electrical and optical properties. In our previous studies, we have demonstrated that cylindrical−shaped SiNWs sustain longitudinal plasmon resonances (LPRs) and transverse plasmon resonances (TPRs). In this work, we will present the results of our investigation on conical SiNWs with different lengths and demonstrate that the NW size plays a role on the spectral response. We selected two groups of SiNWs with approximately 300 nm and 750 nm in length with different lengths and diameters. We investigated the optical properties of the SiNWs at a high energy and spatial resolution by using transmission electron microscopy and in situ electron energy loss spectroscopy. In the UV region of the spectrum investigated here, the experimental evidence suggests the presence of LPRs and a clear presence of TPRs. We found that, as the NW length increases, the LPR fundamental mode shifts towards higher energies, while the diameter seems to affect the TPR, shifting it to lower energy levels when the diameter increases. These SiNWs can play a role in the development of low−dimensional devices for applications in nano−electronics and nano−photonics. |
| format | Article |
| id | doaj-art-18bdd2a874714f2db8963d17d0ed29f8 |
| institution | Kabale University |
| issn | 2304-6732 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Photonics |
| spelling | doaj-art-18bdd2a874714f2db8963d17d0ed29f82024-11-26T18:18:13ZengMDPI AGPhotonics2304-67322024-10-01111199910.3390/photonics11110999Plasmon Response in Individual Conical Silicon Nanowires with Different LengthsRizwan Rafique0Antonino La Magna1Antonio Massimiliano Mio2Salvatore Patanè3Jost Adam4Rosaria Anna Puglisi5CNR—Istituto per la Microelettronica e Microsistemi, Strada Ottava 5, Zona Industriale, 95121 Catania, ItalyCNR—Istituto per la Microelettronica e Microsistemi, Strada Ottava 5, Zona Industriale, 95121 Catania, ItalyCNR—Istituto per la Microelettronica e Microsistemi, Strada Ottava 5, Zona Industriale, 95121 Catania, ItalyDepartment of Mathematics and Computer Science, Physics and Earth Science (MIFT), University of Messina, Viale F. Stagno d’Alcontres 31, 98166 Messina, ItalyComputational Materials and Photonics, EECS, University of Kassel, Wilhelmshöher Allee 71, D-34121 Kassel, GermanyCNR—Istituto per la Microelettronica e Microsistemi, Strada Ottava 5, Zona Industriale, 95121 Catania, ItalySilicon nanowires (SiNWs) are extensively studied in the scientific community due to their remarkable electrical and optical properties. In our previous studies, we have demonstrated that cylindrical−shaped SiNWs sustain longitudinal plasmon resonances (LPRs) and transverse plasmon resonances (TPRs). In this work, we will present the results of our investigation on conical SiNWs with different lengths and demonstrate that the NW size plays a role on the spectral response. We selected two groups of SiNWs with approximately 300 nm and 750 nm in length with different lengths and diameters. We investigated the optical properties of the SiNWs at a high energy and spatial resolution by using transmission electron microscopy and in situ electron energy loss spectroscopy. In the UV region of the spectrum investigated here, the experimental evidence suggests the presence of LPRs and a clear presence of TPRs. We found that, as the NW length increases, the LPR fundamental mode shifts towards higher energies, while the diameter seems to affect the TPR, shifting it to lower energy levels when the diameter increases. These SiNWs can play a role in the development of low−dimensional devices for applications in nano−electronics and nano−photonics.https://www.mdpi.com/2304-6732/11/11/999siliconconicalnanowiresplasmonic resonance |
| spellingShingle | Rizwan Rafique Antonino La Magna Antonio Massimiliano Mio Salvatore Patanè Jost Adam Rosaria Anna Puglisi Plasmon Response in Individual Conical Silicon Nanowires with Different Lengths Photonics silicon conical nanowires plasmonic resonance |
| title | Plasmon Response in Individual Conical Silicon Nanowires with Different Lengths |
| title_full | Plasmon Response in Individual Conical Silicon Nanowires with Different Lengths |
| title_fullStr | Plasmon Response in Individual Conical Silicon Nanowires with Different Lengths |
| title_full_unstemmed | Plasmon Response in Individual Conical Silicon Nanowires with Different Lengths |
| title_short | Plasmon Response in Individual Conical Silicon Nanowires with Different Lengths |
| title_sort | plasmon response in individual conical silicon nanowires with different lengths |
| topic | silicon conical nanowires plasmonic resonance |
| url | https://www.mdpi.com/2304-6732/11/11/999 |
| work_keys_str_mv | AT rizwanrafique plasmonresponseinindividualconicalsiliconnanowireswithdifferentlengths AT antoninolamagna plasmonresponseinindividualconicalsiliconnanowireswithdifferentlengths AT antoniomassimilianomio plasmonresponseinindividualconicalsiliconnanowireswithdifferentlengths AT salvatorepatane plasmonresponseinindividualconicalsiliconnanowireswithdifferentlengths AT jostadam plasmonresponseinindividualconicalsiliconnanowireswithdifferentlengths AT rosariaannapuglisi plasmonresponseinindividualconicalsiliconnanowireswithdifferentlengths |