Accession Number : ADA626777


Title :   Non-collinear Generation of Angularly Isolated Circularly Polarized High Harmonics


Descriptive Note : Journal article


Corporate Author : JOINT INST FOR LAB ASTROPHYSICS BOULDER CO


Personal Author(s) : Hickstein, Daniel D ; Dollar, Franklin J ; Grychtol, Patrik ; Ellis, Jennifer L ; Knut, Ronny ; Hernandez-Garcia, Carlos ; Zusin, Dmitriy ; Gentry, Christian ; Shaw, Justin M ; Fan, Tingting


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a626777.pdf


Report Date : 21 Sep 2015


Pagination or Media Count : 10


Abstract : We generate angularly isolated beams of circularly polarized extreme ultraviolet light through the first implementation of non-collinear high harmonic generation with circularly polarized driving lasers. This non-collinear technique offers numerous advantages over previous methods, including the generation of higher photon energies, the separation of the harmonics from the pump beam, the production of both left and right circularly polarized harmonics at the same wavelength and the capability of separating the harmonics without using a spectrometer. To confirm the circular polarization of the beams and to demonstrate the practicality of this new light source, we measure the magnetic circular dichroism of a 20 nm iron film. Furthermore, we explain the mechanisms of non-collinear high harmonic generation using analytical descriptions in both the photon and wave models. Advanced numerical simulations indicate that this non-collinear mixing enables the generation of isolated attosecond pulses with circular polarization.


Descriptors :   *HARMONIC GENERATORS , *POLARIZATION , *PULSED LASERS , BEAMS(RADIATION) , CHARGE COUPLED DEVICES , DICHROISM , EMISSION , LASER BEAMS , LIGHT SOURCES , LINEARITY , MAGNETIC FIELDS , MIXING , NUMERICAL ANALYSIS , PHOTONS , ULTRAVIOLET RADIATION , WAVES


Subject Categories : Electrical and Electronic Equipment
      Lasers and Masers
      Fiber Optics and Integrated Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE