Generation of $\gamma$-photons and pairs with transverse orbital angular momentum via spatiotemporal optical vortex pulse

Cui-Wen Zhang, De-Sheng Zhang, Bai-Song Xie

We present the generation of well-collimated $\gamma$-photons and pairs with extrinsic transverse orbital angular momentum (TOAM) through the head-on collision of an intense spatiotempo…