Tip enhanced Raman spectroscopy vs. micro-Raman spectroscopy of InP/InGaP axially heterostructured nanowires for tandem solar cells
(2025) Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XIV 2025 In Proceedings of SPIE - The International Society for Optical Engineering 13361.- Abstract
We present a Raman study of axially heterostructured InP/InGaP nanowires (NWs) for tandem solar cells. The study is carried out using both microRaman spectroscopy (µ-Raman), and tip enhanced Raman spectroscopy (TERS). The results obtained by both methods are compared. The results obtained with each one is supported by the simulation of the light/NW interaction using finite element methods. This simulation reveals the electromagnetic distribution in both cases and the regions of the NWs that are excited. We show that µ-Raman is detected in single NWs because of the diameter resonances, and resonances at the heterojunctions. Meanwhile, TERS is due to resonant local electromagnetic field generated by the AFM tip in contact with the NW,... (More)
We present a Raman study of axially heterostructured InP/InGaP nanowires (NWs) for tandem solar cells. The study is carried out using both microRaman spectroscopy (µ-Raman), and tip enhanced Raman spectroscopy (TERS). The results obtained by both methods are compared. The results obtained with each one is supported by the simulation of the light/NW interaction using finite element methods. This simulation reveals the electromagnetic distribution in both cases and the regions of the NWs that are excited. We show that µ-Raman is detected in single NWs because of the diameter resonances, and resonances at the heterojunctions. Meanwhile, TERS is due to resonant local electromagnetic field generated by the AFM tip in contact with the NW, providing the Raman signal arising from a region close to the NW surface. The advantage of TERS is its high lateral resolution as compared to the µ-Raman measurement, which has a poor lateral resolution. Even if the axial heterostructures can be resolved because of the associated resonances, only TERS gives a lateral resolution allowing 2-D Raman maps of the NWs.
(Less)
- author
- Mediavilla, I.
; Anaya, J.
; Pura, J. L.
; Hrachowina, L.
LU
; Borgström, M. T.
LU
and Jimenez, J.
- organization
- publishing date
- 2025
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Finite element method, InP/InGaP NWs, Light/NW interaction, Micro Raman, Tandem solar cells, Tip enhanced Raman spectroscopy (TERS), Tunnel junction
- host publication
- Proceedings. Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XIV
- series title
- Proceedings of SPIE - The International Society for Optical Engineering
- editor
- Freundlich, Alexandre ; Hinzer, Karin ; Sellers, Ian R. and Helmers, Henning
- volume
- 13361
- article number
- 133610A
- publisher
- SPIE
- conference name
- Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XIV 2025
- conference location
- San Francisco, United States
- conference dates
- 2025-01-28 - 2025-01-30
- external identifiers
-
- scopus:105005944629
- ISSN
- 1996-756X
- 0277-786X
- ISBN
- 9781510684706
- DOI
- 10.1117/12.3041849
- language
- English
- LU publication?
- yes
- id
- cea84f6b-318f-48b9-8ccd-32e6e74e8877
- date added to LUP
- 2025-09-15 15:30:07
- date last changed
- 2025-09-29 17:35:31
@inproceedings{cea84f6b-318f-48b9-8ccd-32e6e74e8877, abstract = {{<p>We present a Raman study of axially heterostructured InP/InGaP nanowires (NWs) for tandem solar cells. The study is carried out using both microRaman spectroscopy (µ-Raman), and tip enhanced Raman spectroscopy (TERS). The results obtained by both methods are compared. The results obtained with each one is supported by the simulation of the light/NW interaction using finite element methods. This simulation reveals the electromagnetic distribution in both cases and the regions of the NWs that are excited. We show that µ-Raman is detected in single NWs because of the diameter resonances, and resonances at the heterojunctions. Meanwhile, TERS is due to resonant local electromagnetic field generated by the AFM tip in contact with the NW, providing the Raman signal arising from a region close to the NW surface. The advantage of TERS is its high lateral resolution as compared to the µ-Raman measurement, which has a poor lateral resolution. Even if the axial heterostructures can be resolved because of the associated resonances, only TERS gives a lateral resolution allowing 2-D Raman maps of the NWs.</p>}}, author = {{Mediavilla, I. and Anaya, J. and Pura, J. L. and Hrachowina, L. and Borgström, M. T. and Jimenez, J.}}, booktitle = {{Proceedings. Physics, Simulation, and Photonic Engineering of Photovoltaic Devices XIV}}, editor = {{Freundlich, Alexandre and Hinzer, Karin and Sellers, Ian R. and Helmers, Henning}}, isbn = {{9781510684706}}, issn = {{1996-756X}}, keywords = {{Finite element method; InP/InGaP NWs; Light/NW interaction; Micro Raman; Tandem solar cells; Tip enhanced Raman spectroscopy (TERS); Tunnel junction}}, language = {{eng}}, publisher = {{SPIE}}, series = {{Proceedings of SPIE - The International Society for Optical Engineering}}, title = {{Tip enhanced Raman spectroscopy vs. micro-Raman spectroscopy of InP/InGaP axially heterostructured nanowires for tandem solar cells}}, url = {{http://dx.doi.org/10.1117/12.3041849}}, doi = {{10.1117/12.3041849}}, volume = {{13361}}, year = {{2025}}, }