Polarization dependent formation of femtosecond laser-induced periodic surface structures near stepped features

Journal Article · Mon Jun 09 04:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4882998· OSTI ID:22299998

Murphy, Ryan D. ^[1]; Torralva, Ben ^[2]; Adams, David P. ^[3]; Yalisove, Steven M. ^[4]

---

1. Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109 (United States)
2. Department of Atmospheric, Oceanic and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109 (United States)
3. Sandia National Laboratories, Albuquerque, New Mexico 87123 (United States)
4. Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109 (United States)

Laser-induced periodic surface structures (LIPSS) are formed near 110 nm-tall Au microstructured edges on Si substrates after single-pulse femtosecond irradiation with a 150 fs pulse centered near a 780 nm wavelength. We investigate the contributions of Fresnel diffraction from step-edges and surface plasmon polariton (SPP) excitation to LIPSS formation on Au and Si surfaces. For certain laser polarization vector orientations, LIPSS formation is dominated by SPP excitation; however, when SPP excitation is minimized, Fresnel diffraction dominates. The LIPSS orientation and period distributions are shown to depend on which mechanism is activated. These results support previous observations of the laser polarization vector influencing LIPSS formation on bulk surfaces.

• OSTI ID: 22299998
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 23 Vol. 104; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIFFRACTION
DISTRIBUTION
EXCITATION
GOLD
IRRADIATION
LASER RADIATION
MICROSTRUCTURE
PERIODICITY
POLARIZATION
SILICON
SUBSTRATES
SURFACES
WAVELENGTHS