Journal
NATURE COMMUNICATIONS
Volume 7, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms11893
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Funding
- National Basic Research Program of China [2013CBA01500, 2014CB339801, 2015CB859700]
- National Natural Science Foundation of China [11421064, 11405107, 11475113]
- U.K. EPSRC [EP/J018171/1]
- EC's LASERLAB-EUROPE [654148]
- EuCARD-2 [312453]
- EuPRAXIA [653782]
- Leverhulme Trust Research Project Grant
- EPSRC [EP/J018171/1, EP/N028694/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [1511414, 1511421, EP/N028694/1, EP/J018171/1] Funding Source: researchfish
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Optical modulators can have high modulation speed and broad bandwidth, while being compact. However, these optical modulators usually work for low-intensity light beams. Here we present an ultrafast, plasma-based optical modulator, which can directly modulate highpower lasers with intensity up to 10(16)Wcm(-2) to produce an extremely broad spectrum with a fractional bandwidth over 100%, extending to the mid-infrared regime in the low-frequency side. This concept relies on two co-propagating laser pulses in a sub-millimetre-scale underdense plasma, where a drive laser pulse first excites an electron plasma wave in its wake while a following carrier laser pulse is modulated by the plasma wave. The laser and plasma parameters suitable for the modulator to work are based on numerical simulations.
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