Ultrafast, All Optically Reconfigurable, Nonlinear Nanoantenna
| Autor: | Michele Celebrano, Giulio Cerullo, Paolo Laporta, Giuseppe Marino, Lavinia Ghirardini, Marco Finazzi, Andrea Mazzanti, Daniele Viola, Costantino De Angelis, Eva A. A. Pogna, Giuseppe Della Valle, Giuseppe Leo, Luca Carletti, Andrea Schirato |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Nanostructure Nanophotonics General Physics and Astronomy Physics::Optics 02 engineering and technology all-dielectric nanoantennas all-optical modulation metasurfaces second-harmonic generation ultrafast photonics 01 natural sciences Article 0103 physical sciences General Materials Science 010306 general physics Nanopillar business.industry General Engineering Second-harmonic generation Nonlinear optics 021001 nanoscience & nanotechnology Modulation Femtosecond Optoelectronics 0210 nano-technology business Ultrashort pulse |
| Zdroj: | ACS Nano ACS nano 15 (2021): 11150–11157. doi:10.1021/acsnano.1c03386 info:cnr-pdr/source/autori:Pogna E.A.A.; Celebrano M.; Mazzanti A.; Ghirardini L.; Carletti L.; Marino G.; Schirato A.; Viola D.; Laporta P.; De Angelis C.; Leo G.; Cerullo G.; Finazzi M.; Della Valle G./titolo:Ultrafast, All Optically Reconfigurable, Nonlinear Nanoantenna/doi:10.1021%2Facsnano.1c03386/rivista:ACS nano/anno:2021/pagina_da:11150/pagina_a:11157/intervallo_pagine:11150–11157/volume:15 |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | The enhancement of nonlinear optical effects via nanoscale engineering is a hot topic of research. Optical nanoantennas increase light-matter interaction and provide, simultaneously, a high throughput of the generated harmonics in the scattered light. However, nanoscale nonlinear optics has dealt so far with static or quasi-static configurations, whereas advanced applications would strongly benefit from high-speed reconfigurable nonlinear nanophotonic devices. Here we propose and experimentally demonstrate ultrafast all-optical modulation of the second harmonic (SH) from a single nanoantenna. Our design is based on a subwavelength AlGaAs nanopillar driven by a control femtosecond light pulse in the visible range. The control pulse photoinjects free carriers in the nanostructure, which in turn induce dramatic permittivity changes at the band edge of the semiconductor. This results in an efficient modulation of the SH signal generated at 775 nm by a second femtosecond pulse at the 1.55 ?m telecommunications (telecom) wavelength. Our results can lead to the development of ultrafast, all optically reconfigurable, nonlinear nanophotonic devices for a broad class of telecom and sensing applications. |
| Databáze: | OpenAIRE |
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