Work

Controlling Photon Transverse Orbital Angular Momentum in High Harmonic Generation

Year: 2021

Type: article

Abstract: High harmonic generation (HHG) with longitudinal optical orbital angular momentum has attracted much attention over the past decade. Here, we present the first study on the HHG with transverse orbital angular momentum driven by the spatiotemporal optical vortex (STOV) pulses. We show that the produced spatial-resolved harmonic spectra reveal unique structures, such as the spatially spectral tilt and the fine interference patterns. We show these spatiospectral structures originate from both the macroscopic and microscopic effect of spatiotemporal optical singularity in HHG. Employing two-color counterspin and countervorticity STOV pulses, we further discuss a robust method to control the spatiotemporal topological charge and spectral structure of high-order harmonics. The conservation rule of photon transverse orbital angular momentum in HHG process is also discussed when mixing with photon spin angular momenta.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.127.273901

Authors: Yiqi Fang, Shengyue Lu, Yunquan Liu

Institutions: Peking University, Collaborative Innovation Center of Quantum Matter, Beijing Academy of Quantum Information Sciences, Shanxi University

Language: English

Topic: Laser-Matter Interactions and Applications

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: National Natural Science Foundation of China

Awards: G1284776947, G588625646, G6826829012