Enhancing third-harmonic generation with spatial nonlocality
As the geometrical feature of a nanostructure approaches the Thomas-Fermi screening length, the electron-level interaction induced nonlocality leads to the longitudinal resonance modes above bulk plasmon resonance frequency. In this work, we investigate the contribution of longitudinal modes to the...
| Main Authors: | , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2020
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/139343 |
| _version_ | 1811691720266481664 |
|---|---|
| author | Hu, Hao Zhang, Jingjing Maier, Stefan A. Luo, Yu |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Hu, Hao Zhang, Jingjing Maier, Stefan A. Luo, Yu |
| author_sort | Hu, Hao |
| collection | NTU |
| description | As the geometrical feature of a nanostructure approaches the Thomas-Fermi screening length, the electron-level interaction induced nonlocality leads to the longitudinal resonance modes above bulk plasmon resonance frequency. In this work, we investigate the contribution of longitudinal modes to the enhancement of third-harmonic generation process. Specifically, we study a single Ag nanowire and a Ag nanowire dimer coated with third-order nonlinear dielectrics. By implementing hydrodynamic and nonlinear models together, we find that the spectral overlap of the longitudinal resonance modes with third order harmonics enables the improvement of the nonlinear conversion efficiency. The optimized results show that despite of reduced field enhancement for the fundamental resonance, the third-harmonic absorption intensities in nonlocal case can surpass the local calculation results by hundreds of times. Maximum third-harmonic scattering intensities can also be realized though appropriate design of both structures. In contrast to previous studies that mainly focus on the negative effects of nonlocality, our study indicates that the nonlocal effects may benefit our system with proper designs, opening a new door for quantum plasmonic research. |
| first_indexed | 2024-10-01T06:24:22Z |
| format | Journal Article |
| id | ntu-10356/139343 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:24:22Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1393432020-05-19T03:14:36Z Enhancing third-harmonic generation with spatial nonlocality Hu, Hao Zhang, Jingjing Maier, Stefan A. Luo, Yu School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Nanostructure Surface Plasmons As the geometrical feature of a nanostructure approaches the Thomas-Fermi screening length, the electron-level interaction induced nonlocality leads to the longitudinal resonance modes above bulk plasmon resonance frequency. In this work, we investigate the contribution of longitudinal modes to the enhancement of third-harmonic generation process. Specifically, we study a single Ag nanowire and a Ag nanowire dimer coated with third-order nonlinear dielectrics. By implementing hydrodynamic and nonlinear models together, we find that the spectral overlap of the longitudinal resonance modes with third order harmonics enables the improvement of the nonlinear conversion efficiency. The optimized results show that despite of reduced field enhancement for the fundamental resonance, the third-harmonic absorption intensities in nonlocal case can surpass the local calculation results by hundreds of times. Maximum third-harmonic scattering intensities can also be realized though appropriate design of both structures. In contrast to previous studies that mainly focus on the negative effects of nonlocality, our study indicates that the nonlocal effects may benefit our system with proper designs, opening a new door for quantum plasmonic research. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) 2020-05-19T03:14:36Z 2020-05-19T03:14:36Z 2017 Journal Article Hu, H., Zhang, J., Maier, S. A., & Luo, Y. (2018). Enhancing third-harmonic generation with spatial nonlocality. ACS Photonics, 5(2), 592-598. doi:10.1021/acsphotonics.7b01167 2330-4022 https://hdl.handle.net/10356/139343 10.1021/acsphotonics.7b01167 2-s2.0-85037838825 2 5 592 598 en ACS Photonics © 2017 American Chemical Society. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Nanostructure Surface Plasmons Hu, Hao Zhang, Jingjing Maier, Stefan A. Luo, Yu Enhancing third-harmonic generation with spatial nonlocality |
| title | Enhancing third-harmonic generation with spatial nonlocality |
| title_full | Enhancing third-harmonic generation with spatial nonlocality |
| title_fullStr | Enhancing third-harmonic generation with spatial nonlocality |
| title_full_unstemmed | Enhancing third-harmonic generation with spatial nonlocality |
| title_short | Enhancing third-harmonic generation with spatial nonlocality |
| title_sort | enhancing third harmonic generation with spatial nonlocality |
| topic | Engineering::Electrical and electronic engineering Nanostructure Surface Plasmons |
| url | https://hdl.handle.net/10356/139343 |
| work_keys_str_mv | AT huhao enhancingthirdharmonicgenerationwithspatialnonlocality AT zhangjingjing enhancingthirdharmonicgenerationwithspatialnonlocality AT maierstefana enhancingthirdharmonicgenerationwithspatialnonlocality AT luoyu enhancingthirdharmonicgenerationwithspatialnonlocality |