Optically induced angular alignment of birefringent micro-objects by linear polarization
E Higurashi, R Sawada, T Ito - Applied physics letters, 1998 - pubs.aip.org
Fluorinated polyimide micro-objects having large birefringence of Δn=− 0.13 (refractive
index n 1= 1.62, n 2= 1.49 for the wavelength λ= 1.06 μm), which were fabricated by reactive
ion etching and suspended in water (n= 1.33), were trapped and angularly aligned in a
single Gaussian laser beam (λ= 1.06 μm, power P> 3 μW). The optically induced angular
alignment effect is caused by the transfer of spin angular momentum due to the interaction
between their birefringence and the linearly polarized light.
index n 1= 1.62, n 2= 1.49 for the wavelength λ= 1.06 μm), which were fabricated by reactive
ion etching and suspended in water (n= 1.33), were trapped and angularly aligned in a
single Gaussian laser beam (λ= 1.06 μm, power P> 3 μW). The optically induced angular
alignment effect is caused by the transfer of spin angular momentum due to the interaction
between their birefringence and the linearly polarized light.
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