Phase matching in vector beam-driven high-harmonic generation with 3D-printed gas cells

We present experimental results of high-harmonic generation (HHG) driven by a 1300 nm beam in three different polarization states: linear, radial, and azimuthal. We found that the optimal pressure for phase matching was roughly twice as high for the vector beam drivers than the linear driver. We attribute this difference in pressure primarily to the Gouy phase, which differs by a factor of two between the linear and vector polarization states. We demonstrate a target for HHG that produces a uniform pressure profile in the interaction region that is nearly identical to the backing pressure and preserves the mode of the driving beam. We provide characterization and validation of this technique through flow simulations and experimental measurements.