Precise tailoring of optical vector beams is demonstrated, shaping their focal electric fields and used to create complex laser micro-patterning on a metal surface. A Spatial Light Modulator (SLM) and a micro-structured S-waveplate were integrated with a picosecond laser system and employed to structure the vector fields into radial and azimuthal polarizations with and without a vortex phase wavefront as well as superposition states. Imprinting Laser Induced Periodic Surface Structures (LIPSS) elucidates the detailed vector fields around the focal region. In addition to clear azimuthal and radial plasmon surface structures, unique, variable logarithmic spiral micro-structures with a pitch Λ ∼1μm, not observed previously, were imprinted on the surface, confirming unambiguously the complex 2D focal electric fields. We show clearly also how the Orbital Angular Momentum(OAM) associated with a helical wavefront induces rotation of vector fields along the optic axis of a focusing lens and confirmed by the observed surface micro-structures.
Tailored optical vector fields for ultrashort-pulse laser induced complex surface plasmon structuring.
J. Ouyang,W. Perrie,O. Allegre,T. Heil,Y. Jin,E. Fearon,D. Eckford,S. Edwardson,G. Dearden
Published 2015 in Optics Express
ABSTRACT
PUBLICATION RECORD
- Publication year
2015
- Venue
Optics Express
- Publication date
2015-05-18
- Fields of study
Medicine, Physics, Engineering
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
CITATION MAP
EXTRACTION MAP
CLAIMS
- No claims are published for this paper.
CONCEPTS
- No concepts are published for this paper.
REFERENCES
Showing 1-28 of 28 references · Page 1 of 1
CITED BY
Showing 1-47 of 47 citing papers · Page 1 of 1