Journal
ACS PHOTONICS
Volume 3, Issue 8, Pages 1517-1522Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.6b00108
Keywords
nanophotonics; plasmonics; nonlinear optics; ultrafast optics; metasurfaces
Categories
Funding
- EPSRC (UK)
- ERC [321268]
- Royal Society
- Wolfson Foundation
- EC [304179]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- Engineering and Physical Sciences Research Council [EP/M013812/1, EP/K005014/1, EP/H000917/2, EP/J015393/1, EP/M028054/1] Funding Source: researchfish
- EPSRC [EP/H000917/2, EP/K005014/1, EP/J015393/1, EP/M013812/1, EP/M028054/1] Funding Source: UKRI
- European Research Council (ERC) [321268] Funding Source: European Research Council (ERC)
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We design and fabricate a metasurface composed of gold cut-disk resonators that exhibits a strong coherent nonlinear response. We experimentally demonstrate all-optical modulation of both second- and third-harmonic signals on a subpicosecond time scale. Pump probe experiments and numerical models show that the observed effects are due to the ultrafast response of the electronic excitations in the metal under external illumination. These effects pave the way for the development of novel active nonlinear metasurfaces with controllable and switchable coherent nonlinear response.
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