High-energy mid-infrared sub-cycle pulse synthesis from a parametric amplifier

Houkun Liang, Peter Krogen, Zhou Wang, Hyunwook Park, Tobias Kroh, Kevin Zawilski, Peter Schunemann, Jeffrey Moses, Louis F. DiMauro, Franz X. Kärtner and Kyung-Han Hong ()
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Houkun Liang: Massachusetts Institute of Technology (MIT)
Peter Krogen: Massachusetts Institute of Technology (MIT)
Zhou Wang: The Ohio State University
Hyunwook Park: The Ohio State University
Tobias Kroh: Massachusetts Institute of Technology (MIT)
Kevin Zawilski: BAE System, MER15-1813
Peter Schunemann: BAE System, MER15-1813
Jeffrey Moses: Massachusetts Institute of Technology (MIT)
Louis F. DiMauro: The Ohio State University
Franz X. Kärtner: Massachusetts Institute of Technology (MIT)
Kyung-Han Hong: Massachusetts Institute of Technology (MIT)

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract High-energy phase-stable sub-cycle mid-infrared pulses can provide unique opportunities to explore phase-sensitive strong-field light–matter interactions in atoms, molecules and solids. At the mid-infrared wavelength, the Keldysh parameter could be much smaller than unity even at relatively modest laser intensities, enabling the study of the strong-field sub-cycle electron dynamics in solids without damage. Here we report a high-energy sub-cycle pulse synthesiser based on a mid-infrared optical parametric amplifier and its application to high-harmonic generation in solids. The signal and idler combined spectrum spans from 2.5 to 9.0 µm. We coherently synthesise the passively carrier-envelope phase-stable signal and idler pulses to generate 33 μJ, 0.88-cycle, multi-gigawatt pulses centred at ~4.2 μm, which is further energy scalable. The mid-infrared sub-cycle pulse is used for driving high-harmonic generation in thin silicon samples, producing harmonics up to ~19th order with a continuous spectral coverage due to the isolated emission by the sub-cycle driver.

Date: 2017
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DOI: 10.1038/s41467-017-00193-4

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