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All-Optical Switchi...
All-Optical Switching and Unidirectional Plasmon Launching with Nonlinear Dielectric Nanoantennas
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- Krasnok, A. E. (författare)
- The University of Texas at Austin, USA,Saint Petersburg National Research University of Information Technologies, Mechanics and Optics University (ITMO), Russian Federation
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- Li, S. (författare)
- Saint Petersburg National Research University of Information Technologies, Mechanics and Optics University (ITMO), Russian Federation
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- Lepeshov, S. I. (författare)
- Saint Petersburg National Research University of Information Technologies, Mechanics and Optics University (ITMO), Russian Federation
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- Savelev, R.S. (författare)
- Saint Petersburg National Research University of Information Technologies, Mechanics and Optics University (ITMO), Russian Federation
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- Baranov, Denis, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology,Moscow Institute of Physics and Technology
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- Alú, Andrea (författare)
- The University of Texas at Austin, USA
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(creator_code:org_t)
- 2018
- 2018
- Engelska.
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Ingår i: Physical Review Applied. - 2331-7019. ; 9:1
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- High-index dielectric nanoparticles have become a powerful platform for nonlinear nanophotonics due to special types of optical nonlinearity, e.g. caused by electron-hole plasma (EHP) photoexcitation. We propose a highly tunable dielectric nanoantenna consisting of a chain of silicon particles excited by a dipole emitter. The nanoantenna exhibits slow group-velocity guided modes, corresponding to the Van Hove singularity in an infinite structure, which enable a large Purcell factor up to several hundred and are very sensitive to the nanoparticle permittivity. This sensitivity enables the nanoantenna tuning via EHP excitation with an ultrafast laser pumping. Dramatic variations in the nanoantenna radiation patterns and Purcell factor caused by ultrafast laser pumping of several boundary nanoparticles with relatively low intensities of about 25 GW/cm2 are shown. Unidirectional surface-plasmon polaritons launching with EHP excitation in the nanoantenna on a Ag substrate is demonstrated.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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