SBRIP particles achieve directed light propulsion through internal refractive index gradients that break optical symmetry, independent of external geometry.
By utilizing subwavelength gratings, it is possible to tune the refractive index between that of Silicon (n≈3.5) and that of Silicon oxide (n≈1.45) [87]
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Light-propelled microparticles based on symmetry-broken refractive index profiles
SBRIP particles achieve directed light propulsion through internal refractive index gradients that break optical symmetry, independent of external geometry.