Journal
NATURE COMMUNICATIONS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms4246
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Funding
- European Commission
- Faculty of Science at the University of Sydney
- Australian Research Council (ARC) through the Centre of Excellence (CUDOS)
- Discovery project [DP110100003]
- DECRA programs [DE120100226, DE120101329, DE130101148]
- NKBRSF [G2010CB923200]
- NNSFC [11204386]
- GNSF [S2012040007812]
- EPSRC [EP/F001622/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/F001622/1] Funding Source: researchfish
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The ability to use coherent light for material science and applications is linked to our ability to measure short optical pulses. While free-space optical methods are well established, achieving this on a chip would offer the greatest benefit in footprint, performance and cost, and allow the integration with complementary signal-processing devices. A key goal is to achieve operation at sub-watt peak power levels and on sub-picosecond timescales. Previous integrated demonstrations require either a temporally synchronized reference pulse, an off-chip spectrometer or long tunable delay lines. Here we report a device capable of achieving single-shot time-domain measurements of near-infrared picosecond pulses based on an ultra-compact integrated CMOS-compatible device, which could operate without any external instrumentation. It relies on optical third-harmonic generation in a slow-light silicon waveguide. Our method can also serve as an in situ diagnostic tool to map, at visible wavelengths, the propagation dynamics of near-infrared pulses in photonic crystals.
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