Terahertz Spatiotemporal Wave Synthesis in Random Systems
Vittorio Cecconi, Vivek Kumar, Jacopo Bertolotti, Luke Peters, Antonio Cutrona, Luana Olivieri, Alessia Pasquazi, Juan Sebastian Totero Gongora, Marco Peccianti
Abstract
Complex media have emerged as a powerful and robust framework to control light-matter interactions designed for task-specific optical functionalities. Studies on wavefront shaping through disordered systems have demonstrated optical wave manipulation capabilities beyond conventional optics, including aberration-free and subwavelength focusing. However, achieving arbitrary and simultaneous control over the spatial and temporal features of light remains challenging. In particular, no practical solution exists for field-level arbitrary spatiotemporal control of wave packets. A new paradigm shift has emerged in the terahertz frequency domain, offering methods for absolute time-domain measurements of the scattered electric field, enabling direct field-based wave synthesis. In this work, we report the experimental demonstration of field-level control of single-cycle terahertz pulses on arbitrary spatial points through complex disordered media.