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EnglishTerahertz resonant nanoantennas have recently become a key tool to investigate otherwise inaccessible interactions of such long-wavelength radiation with nano-matter. Because of their high-aspect-ratio rod-shaped geometry, resonant nanoantennas suffer from severe loss, which ultimately limits their field localization performance. Here we show, via a quasi-analytical model, numerical simulations, and experimental evidence, that a proper tapering of such nanostructures relaxes their overall loss, leading to an augmented local field enhancement and a significantly reduced resonator mode volume. Our findings, which can also be extended to more complex geometries and higher frequencies, have profound implications for enhanced sensing and spectroscopy of nano-objects, as well as for designing more effective platforms for nanoscale long-wavelength cavity quantum electrodynamics.
Aglieri V., Jin X., Rovere A., Piccoli R., Caraffini D., Tuccio S., et al. (2020). Improving nanoscale terahertz field localization by means of sharply tapered resonant nanoantennas. NANOPHOTONICS, 9(3), 683-690.
| Data di pubblicazione: | 2020 | |
| Titolo: | Improving nanoscale terahertz field localization by means of sharply tapered resonant nanoantennas | |
| Autori: | ||
| Citazione: | Aglieri V., Jin X., Rovere A., Piccoli R., Caraffini D., Tuccio S., et al. (2020). Improving nanoscale terahertz field localization by means of sharply tapered resonant nanoantennas. NANOPHOTONICS, 9(3), 683-690. | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1515/nanoph-2019-0459 | |
| Abstract: | Terahertz resonant nanoantennas have recently become a key tool to investigate otherwise inaccessible interactions of such long-wavelength radiation with nano-matter. Because of their high-aspect-ratio rod-shaped geometry, resonant nanoantennas suffer from severe loss, which ultimately limits their field localization performance. Here we show, via a quasi-analytical model, numerical simulations, and experimental evidence, that a proper tapering of such nanostructures relaxes their overall loss, leading to an augmented local field enhancement and a significantly reduced resonator mode volume. Our findings, which can also be extended to more complex geometries and higher frequencies, have profound implications for enhanced sensing and spectroscopy of nano-objects, as well as for designing more effective platforms for nanoscale long-wavelength cavity quantum electrodynamics. | |
| Settore Scientifico Disciplinare: | Settore ING-INF/01 - Elettronica | |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Nanophotonics - 9(3) - 683–690 (2020).pdf | Articolo principale | Versione Editoriale | Open Access Visualizza/Apri |
http://hdl.handle.net/10447/414199
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