Quasi-phase-matching of only even-order high harmonics

Tzvi Diskin, Oren Cohen

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


High harmonic spectrum of a quasi-monochromatic pump that interacts with isotropic media consists of only odd-order harmonics. Addition of a secondary pump, e.g. a static field or the second harmonic of the primary pump, can results with generation of both odd and even harmonics of the primary pump. We propose a method for quasi-phase matching of only the even-order harmonics of the primary pump. We formulate a theory for this process and demonstrate it numerically. We also show that it leads to attosecond pulse trains with constant carrier envelop phase and high repetition rate.

Original languageEnglish
Pages (from-to)7145-7153
Number of pages9
JournalOptics Express
Issue number6
StatePublished - 2014
Externally publishedYes


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