| Autor: |
Mendoza-Hernández J; Facultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla , Puebla , Mexico., Arroyo Carrasco ML; Facultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla , Puebla , Mexico., Méndez Otero MM; Facultad de Ciencias Físico Matemáticas, Benemérita Universidad Autónoma de Puebla , Puebla , Mexico., Chávez-Cerda S; Instituto Nacional de Astrofísica, Óptica y Electrónica , Luis Enrique Erro # 1, Tonantzintla, Puebla , Mexico., Iturbe Castillo MD; Instituto Nacional de Astrofísica, Óptica y Electrónica , Luis Enrique Erro # 1, Tonantzintla, Puebla , Mexico. |
| Abstrakt: |
In this paper, we demonstrate, numerically and experimentally that using the mask-lens setup used by Durnin to generate Bessel beams Durnin [Phys. Rev. Lett. 58, 1499 (1987)], it is possible to generate different kinds of propagation invariant beams. A modification in the amplitude or phase of the field that illuminates the annular slit is proposed that corresponds to modulation in frequency space. In particular, we characterize the new invariant beams that were obtained by modulating the amplitude of the annular mask and when the incident field was modulated with a one-dimensional quadratic or cubic phase. Experimental results using an amplitude mask are shown in order to corroborate the numerical predictions. |
