Coherent Control of a Plasmonic Nanoantenna Integrated on a Silicon Chip
| Autor: | Amadeu Griol, Alba Espinosa-Soria, Francisco J. Díaz-Fernández, Elena Pinilla-Cienfuegos, Javier Martí, Alejandro Martínez |
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| Rok vydání: | 2018 |
| Předmět: |
Nanoantenna
Diffraction Silicon photonics Physics::Optics 02 engineering and technology 01 natural sciences Coherent perfect absorption 010309 optics TEORIA DE LA SEÑAL Y COMUNICACIONES 0103 physical sciences Electrical and Electronic Engineering Plasmon Physics business.industry Scattering Bandwidth (signal processing) 021001 nanoscience & nanotechnology Polarization (waves) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Wavelength Coherent control Optoelectronics 0210 nano-technology business Biotechnology |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| ISSN: | 2330-4022 |
| Popis: | [EN] Illuminating a plasmonic nanoantenna by a se of coherent light beams should tremendously modify its scattering, absorption and polarization properties, thus, enabling all-optical dynamic manipulation. However, diffraction inherently makes coherent control of isolated subwavelength-sizecl nanoantennas highly challenging when Uninitiated from free-space. Here, we overcome this limitation by placing the nanoantenna at a subwavelength distance of the output facet of silicon, waveguides that provide monolithically defined paths for multibeam coherent illumination. Inspired by coherent perfect absorption (CPA) concepts, we demonstrate experimentally modulation of the nanoantenna scattering by more than 1 order of magnitude and of the on-chip transmfission by > 50% over a similar to 200 nm bandwidth at telecom wavelengths by changing the phase between two counter-directional coherent guided beams. Moreover, we demonstrate coherent synthesis of polarization of the radiated field by illuminating the nanoantenna from orthogonal waveguides. Our finding paves the way toward coherent manipulation of nanoantennas and all-optical processing without nonlinearities in art integrated platform. All the authors acknowledge support from the Spanish Ministry of Economy and Competiveness (MINECO): A.E.-S. under Grant BES-2015-073146, E.P.-C. under Grant FJCI-2015-27228, F.J.D.-F. under Grant TEC2015-63838-C3-1-R, and A.M. under Grants TEC2014-51902-C2-1-R and TEC2014-61906-EXP. |
| Databáze: | OpenAIRE |
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