RT Journal Article T1 On the behavior of vector light needles using modulation functions with topological charge A1 Martínez Herrero, María Rosario A1 Jubells, Ignasi A1 Maluenda, David A1 Carnicer, Artur AB In the present communication, we describe how to produce long light distributions in the focal area of a high numerical aperture optical system using a custom modulation function with spiral charge. This analysis expands our previous developments in the field. We analyze the effect of this new element on the behavior of light along the optical axis. PB SPIE-Int Soc Optical Engineering SN 0277-786X YR 2019 FD 2019 LK https://hdl.handle.net/20.500.14352/12357 UL https://hdl.handle.net/20.500.14352/12357 LA eng NO Conference on Applicantions of Optics and Photonics (AOP) (4ª. 2019. Lisboa).ISBN:978-1-5106-3164-9.© 2019 SPIE.RR.M.H. and A.C. acknowledges support from Ministerio de Economia y Competitividad (MINECO) grant number FIS2016-75147-C3-1-P. NO Ministerio de Economia y Competitividad (MINECO) DS Docta Complutense RD 7 abr 2026