Giant nonlinear response at a plasmonic nanofocus drives efficient four-wave mixing over micron length scales (Conference Presentation)

Rupert F. Oulton; Michael P. Nielsen; Paul Dichtl; Xingyuan Shi; Stefan A Maier

doi:10.1117/12.2511459

4 March 2019 Giant nonlinear response at a plasmonic nanofocus drives efficient four-wave mixing over micron length scales (Conference Presentation)

Rupert F. Oulton, Michael P. Nielsen, Paul Dichtl, Xingyuan Shi, Stefan A Maier

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Proceedings Volume 10922, Smart Photonic and Optoelectronic Integrated Circuits XXI; 109220D (2019) https://doi.org/10.1117/12.2511459
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

Efficient optical frequency mixing typically must accumulate over large interaction lengths because nonlinear responses in natural materials are inherently weak. This limits the efficiency of mixing processes owing to the requirement of phase matching. Here, we report efficient four-wave mixing (FWM) over micrometer-scale interaction lengths at telecommunications wavelengths on silicon. We used an integrated plasmonic gap waveguide that strongly confines light within a nonlinear organic polymer. The gap waveguide intensifies light by nanofocusing it to a mode cross-section of a few tens of nanometers, thus generating a nonlinear response so strong that efficient FWM accumulates over wavelength-scale distances. This technique opens up nonlinear optics to a regime of relaxed phase matching, with the possibility of compact, broadband, and efficient frequency mixing integrated with silicon photonics.

Conference Presentation

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Rupert F. Oulton, Michael P. Nielsen, Paul Dichtl, Xingyuan Shi, and Stefan A Maier "Giant nonlinear response at a plasmonic nanofocus drives efficient four-wave mixing over micron length scales (Conference Presentation)", Proc. SPIE 10922, Smart Photonic and Optoelectronic Integrated Circuits XXI, 109220D (4 March 2019); https://doi.org/10.1117/12.2511459

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KEYWORDS

Four wave mixing

Nonlinear response

Plasmonics

Nonlinear optics

Phase matching

Waveguides

Polymer multimode waveguides

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