Arbitrarily spin-orientated and super-resolved focal spot
Posted on 2018-08-02 - 15:50
In this letter, we propose an accessible approach for achieving a robust focal spot capable of both super resolution and arbitrary spin orientation. Toward this aim, we meticulously devise a structured incident light consisting of three sorts of beams and detailedly elucidate to produce it by the superposition of a radially polarized beam and an azimuthally polarized beam. Via tightly focusing counter-propagating patterned illuminating beams in a 4π optical microscopic configuration, three polarized components perpendicular to each other are created, enabling to yield a super-resolved focal spot possessing spatial spin axis. By wilfully adjusting the amplitude factors of the containing beams, the spin direction can be freely tunable. Such well-defined electric field behavior is largely ascribed to perfect interference caused by all the polarized components. The demonstrated results may greatly expand the practical applications related to the spin photonics.
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Yan, Weichao; nie, zhongquan; liu, Xiaofei; Zhang, Xueru; Wang, Yuxiao; Song, Yinglin (2018). Arbitrarily spin-orientated and super-resolved focal spot. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4107515.v1
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AUTHORS (6)
WY
Weichao Yan
zn
zhongquan nie
Xl
Xiaofei liu
XZ
Xueru Zhang
YW
Yuxiao Wang
YS
Yinglin Song