期刊
ACS PHOTONICS
卷 5, 期 8, 页码 3166-3171出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.8b00387
关键词
plasmonics; nonlinear optics; ultrashort pulse characterization; nanoantennas; sum frequency generation; four wave mixing
类别
资金
- EPSRC Reactive Plasmonic Programme Grant [EP/M013812/1]
- EPSRC Prize Doctoral Fellowship [RGP-2016064]
- Leverhulme Research Project [RPG-2016-064]
- EPSRC [EP/I004343/1, EP/M013812/1] Funding Source: UKRI
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.
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