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- W2789248630 abstract "Abstract We introduce a new method for producing optical needles with tunable length and almost constant irradiance based on the evaluation of the on-axis power content of the light distribution at the focal area. According to theoretical considerations, we propose an adaptive modulating continuous function that presents a large derivative and a zero value jump at the entrance pupil of the focusing system. This distribution is displayed on liquid crystal devices using holographic techniques. In this way, a polarized input beam is shaped and subsequently focused using a high numerical aperture (NA) objective lens. As a result, needles with variable length and nearly constant irradiance are produced using conventional optics components. This procedure is experimentally demonstrated obtaining a 53 λ -long and 0.8 λ -wide needle." @default.
- W2789248630 created "2018-03-29" @default.
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- W2789248630 date "2018-02-08" @default.
- W2789248630 modified "2023-09-30" @default.
- W2789248630 title "Synthesis of light needles with tunable length and nearly constant irradiance" @default.
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- W2789248630 doi "https://doi.org/10.1038/s41598-018-21007-7" @default.
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