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- W2729126480 abstract "Fractional Bessel–Gauss light-sheets [J. Opt.19, 055602 (2017)JOOPDB0150-536X10.1088/2040-8986/aa649a], which correspond to finite optical “slices” in 2D and possess asymmetric slit openings and bending characteristics, are examined from the standpoint of optical radiation force and spin torque theories for a subwavelength spheroid with arbitrary orientation in space. The vector angular spectrum decomposition method in addition to the Lorenz gauge condition and Maxwell’s equations are used to determine the Cartesian components of the incident radiated electric field of the Bessel–Gauss light-sheets. In the framework of the dipole approximation, the numerical results for the Cartesian components of the optical radiation force and spin torque vectors show that negative forces (oriented in the opposite direction of wave motion) and spin torques arise depending on the beam parameters, the orientation of the subwavelength spheroid in 3D space, and its aspect ratio (i.e., prolate versus oblate). The spin torque sign reversal reveals that counter-clockwise or clockwise rotations around the center of mass of the spheroid can occur. The results find important applications in the application of auto-focusing light-sheets in particle manipulation, rotation, and optical sorting devices." @default.
- W2729126480 created "2017-07-14" @default.
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- W2729126480 date "2017-06-29" @default.
- W2729126480 modified "2023-10-14" @default.
- W2729126480 title "Negative optical radiation force and spin torques on subwavelength prolate and oblate spheroids in fractional Bessel–Gauss pincers light-sheets" @default.
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- W2729126480 doi "https://doi.org/10.1364/josaa.34.001246" @default.
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