RT Journal Article
T1 Synthesis of light needles with tunable length and nearly constant irradiance
A1 Martínez Herrero, Rosario
A1 Maluenda, David
A1 Carnicer, Artur
AB 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 lambda-long and 0.8 lambda-wide needle.
PB Nature Publishing Group
SN 2045-2322
YR 2018
FD 2018-02-08
LK https://hdl.handle.net/20.500.14352/11989
UL https://hdl.handle.net/20.500.14352/11989
LA eng
NO © The Author(s) 2018.R.M.H. and A.C. acknowledges support from Ministerio de Economía y Competitividad (MINECO) grant number FIS2016-75147-C3-1-P.
NO Ministerio de Economia y Competitividad (MINECO)
DS Docta Complutense
RD 2 may 2024