Abstract：
:Up to now, full tunability of waveforms was possible only in electronics, up to radio-frequencies. Here we propose a new concept of producing few-cycle terahertz (THz) pulses with widely tunable waveforms. It is based on control of the phase delay between different parts of the THz wavefront using linear diffractive optical elements. Suitable subcycle THz wavefronts can be generated via coherent excitation of nonlinear low-frequency oscillators by few-cycle optical pulses. Using this approach it is possible to shape the electric field rather than the slow pulse envelope, obtaining, for instance, rectangular or triangular waveforms in the THz range. The method is upscalable to the optical range if the attosecond pump pulses are used.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Pakhomov AV,Arkhipov RM,Arkhipov MV,Demircan A,Morgner U,Rosanov NN,Babushkin Idoi
10.1038/s41598-019-43852-wsubject
Has Abstractpub_date
2019-05-15 00:00:00pages
7444issue
1issn
2045-2322pii
10.1038/s41598-019-43852-wjournal_volume
9pub_type
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