Double Blind Ultrafast Pulse Characterization by Mixed Frequency Generation in a Gold Antenna

Ultrafast pulse characterization requires the analysis of correlation functions generated by frequency mixing of optical pulses in a nonlinear medium. In this work, we use a gold optical nanoantenna to generate simultaneously Four Wave Mixing and Sum Frequency Generation across the tuning range of a...

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Bibliographic Details
Published in:ACS photonics 2018-08, Vol.5 (8), p.3166-3171
Main Authors: Gennaro, Sylvain D, Li, Yi, Maier, Stefan A, Oulton, Rupert F
Format: Article
Language:English
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Summary:Ultrafast pulse characterization requires the analysis of correlation functions generated by frequency mixing of optical pulses in a nonlinear medium. In this work, we use a gold optical nanoantenna to generate simultaneously Four Wave Mixing and Sum Frequency Generation across the tuning range of a Ti:Sapphire and Optical Parametric Oscillator (OPO) system. Since metal nanoparticles create remarkably strong nonlinear responses for their size without the need for phase matching, this allows us to simultaneously characterize the unknown OPO pulse and its pump pulse using a single spectrogram. The nonlinear mixing is efficient enough to retrieve pulses with energies in the picojoule range.
ISSN:2330-4022
2330-4022
DOI:10.1021/acsphotonics.8b00387