In-line production of a bi-circular field for generation of helically polarized high-order harmonics

Ofer Kfir*, Eliyahu Bordo, Gil Ilan Haham, Oren Lahav, Avner Fleischer, Oren Cohen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

The recent demonstration of bright circularly polarized high-order harmonics of a bi-circular pump field gave rise to new opportunities in ultrafast chiral science. In previous works, the required nontrivial bi-circular pump field was produced using a relatively complicated and sensitive Mach-Zehnder-like interferometer. We propose a compact and stable in-line apparatus for converting a quasi-monochromatic linearly polarized ultrashort driving laser field into a bi-circular field and employ it for generation of helically polarized high-harmonics. Furthermore, utilizing the apparatus for a spectroscopic spin-mixing measurement, we identify the photon spins of the bi-circular weak component field that are annihilated during the high harmonics process.

Original languageEnglish
Article number211106
JournalApplied Physics Letters
Volume108
Issue number21
DOIs
StatePublished - 23 May 2016
Externally publishedYes

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