RT Journal Article T1 Uncertainty principle for axial power content of highly focused fields A1 Martínez Herrero, Rosario A1 Carnicer, Artur A1 Juvells, Ignasi A1 Sanz Ortiz, Ángel Santiago AB In the analysis of the on-axis intensity for a highly focused optical field, it is highly desirable to deal with effective relations aimed at characterizing the field behavior in a rather simple fashion. Here, a novel and adequate measure for the size of the region where the axial power content mainly concentrates is proposed on the basis of an uncertainty principle. Accordingly, a meaningful relationship is provided for both the spread of the incident beam at the entrance of the highly focused optical system and the size of the region where the on-axis power mainly concentrates. PB The Optical Society Of America SN 1094-4087 YR 2020 FD 2020-09-29 LK https://hdl.handle.net/20.500.14352/7534 UL https://hdl.handle.net/20.500.14352/7534 LA eng NO © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.Agencia Estatal de Investigación and European Regional Development Fund (FIS2016- 75147-C3-1-P, FIS2016-76110-P, PID2019-104268GB-C21, PID2019-104268GB-C22). NO Ministerio de Ciencia e Innovación (MICINN)/FEDER DS Docta Complutense RD 28 abr 2024