“…In electromagnetism, the most usual magnitude to unravel the chirality of a sample is the handedness of circularlypolarized (CPL) fields [9,10], commonly referred to as helicity [11]. In addition to the potential applications of helicity in the context of optical forces [12][13][14][15][16][17][18][19][21][22][23][24], spin-orbit interactions of light [25][26][27][28][29][30][31][32], or its fundamental connection to Kerker conditions [33][34][35], helicity can also be used to probe chiral and achiral objects [36][37][38][39][40]. Now, an object is electromagnetically achiral if all components of the scattered field under the illumination with CPL electromagnetic waves of one sign can also be mimicked with incident CPL waves of the opposite sign.…”