Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers
© COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. Various scatterers such as rough surfaces or nanostructures are typically used to enhance the low efficiency of Raman spectroscopy (surface-enhanced Raman scattering). In this work, we find fundamental upper bounds on...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SPIE
2021
|
| Online Access: | https://hdl.handle.net/1721.1/138057 |
| _version_ | 1826200957164191744 |
|---|---|
| author | Benzaouia, Mohammed Michon, Jérôme Christiansen, Rasmus E. Yao, Wenjie Miller, Owen D. Sigmund, Ole Johnson, Steven G. |
| author_facet | Benzaouia, Mohammed Michon, Jérôme Christiansen, Rasmus E. Yao, Wenjie Miller, Owen D. Sigmund, Ole Johnson, Steven G. |
| author_sort | Benzaouia, Mohammed |
| collection | MIT |
| description | © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. Various scatterers such as rough surfaces or nanostructures are typically used to enhance the low efficiency of Raman spectroscopy (surface-enhanced Raman scattering). In this work, we find fundamental upper bounds on the Raman enhancement for arbitrary-shaped scatterers, depending only on its material constants and the separation distance from the molecule. According to our metric, silver is optimal in visible wavelengths while aluminum is better in the near-UV region. Our general analytical bound scales as the volume of the scatterer and the inverse sixth power of the distance to the active molecule. For periodic scatterers, a second bound with surface-area scaling is presented. Simple geometries such as spheres and bowties are shown to fall short of the bounds. However, using topology optimization based inverse design, we obtain surprising structures maximizing the Raman enhancement. These optimization results shed light to what extent our bounds are achievable. |
| first_indexed | 2024-09-23T11:44:22Z |
| format | Article |
| id | mit-1721.1/138057 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:44:22Z |
| publishDate | 2021 |
| publisher | SPIE |
| record_format | dspace |
| spelling | mit-1721.1/1380572021-11-10T03:29:05Z Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers Benzaouia, Mohammed Michon, Jérôme Christiansen, Rasmus E. Yao, Wenjie Miller, Owen D. Sigmund, Ole Johnson, Steven G. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only. Various scatterers such as rough surfaces or nanostructures are typically used to enhance the low efficiency of Raman spectroscopy (surface-enhanced Raman scattering). In this work, we find fundamental upper bounds on the Raman enhancement for arbitrary-shaped scatterers, depending only on its material constants and the separation distance from the molecule. According to our metric, silver is optimal in visible wavelengths while aluminum is better in the near-UV region. Our general analytical bound scales as the volume of the scatterer and the inverse sixth power of the distance to the active molecule. For periodic scatterers, a second bound with surface-area scaling is presented. Simple geometries such as spheres and bowties are shown to fall short of the bounds. However, using topology optimization based inverse design, we obtain surprising structures maximizing the Raman enhancement. These optimization results shed light to what extent our bounds are achievable. 2021-11-09T19:40:31Z 2021-11-09T19:40:31Z 2020-08-20 2021-05-20T15:52:57Z Article http://purl.org/eprint/type/ConferencePaper https://hdl.handle.net/1721.1/138057 Benzaouia, Mohammed, Michon, Jérôme, Christiansen, Rasmus E., Yao, Wenjie, Miller, Owen D. et al. 2020. "Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers." Proceedings of SPIE - The International Society for Optical Engineering, 11462. en 10.1117/12.2567352 Proceedings of SPIE - The International Society for Optical Engineering Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf SPIE SPIE |
| spellingShingle | Benzaouia, Mohammed Michon, Jérôme Christiansen, Rasmus E. Yao, Wenjie Miller, Owen D. Sigmund, Ole Johnson, Steven G. Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers |
| title | Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers |
| title_full | Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers |
| title_fullStr | Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers |
| title_full_unstemmed | Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers |
| title_short | Limits to surface-enhanced Raman scattering near arbitrary-shape scatterers |
| title_sort | limits to surface enhanced raman scattering near arbitrary shape scatterers |
| url | https://hdl.handle.net/1721.1/138057 |
| work_keys_str_mv | AT benzaouiamohammed limitstosurfaceenhancedramanscatteringneararbitraryshapescatterers AT michonjerome limitstosurfaceenhancedramanscatteringneararbitraryshapescatterers AT christiansenrasmuse limitstosurfaceenhancedramanscatteringneararbitraryshapescatterers AT yaowenjie limitstosurfaceenhancedramanscatteringneararbitraryshapescatterers AT millerowend limitstosurfaceenhancedramanscatteringneararbitraryshapescatterers AT sigmundole limitstosurfaceenhancedramanscatteringneararbitraryshapescatterers AT johnsonsteveng limitstosurfaceenhancedramanscatteringneararbitraryshapescatterers |