Enhancing spin polarization using attosecond angular streaking

We use the R-matrix with time-dependence method [1-4] to investigate spin polarization of electrons ejected from the krypton atom by an angular streaking scheme. Through solution of the multielectron, semi-relativistic, time-dependent Schrödinger equation, we show that angular streaking produces strongly spin-polarized electrons. We find that the degree of spin polarization attainable using the angular streaking scheme exceeds that acheived using longer circularly polarized pulses. The degree of spin polarization increases with the Keldysh parameter, so that angular streaking --- ordinarily applied to investigate tunneling --- may be repurposed to generate strongly spin-polarized electron bunches. Additionally, we explore modifications of the angular streaking scheme that also enhance spin polarization.

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