Chirality is a fundamental symmetry property of materials. Beyond the conventional classification of crystal systems as chiral or achiral, there exists a distinct subclass of achiral systems known as antiferrochiral. In this kick-off seminar of the MPSD internal seminar series, I will discuss the novel properties of such systems, including linear and nonlinear responses, as well as quasiparticle excitations.The concept of higher-order chirality will be introduced as a unified framework to describe these systems. Building on this perspective, new opportunities for chirality engineering will be highlighted, focusing on two recent experimental demonstrations from the Cavalleri department: light control of chirality and strain control of chirality.
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