Femtosecond diffraction dynamics of laser-induced periodic surface structures on fused silica

Journal Article · Mon Feb 04 04:00:00 EST 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4790284· OSTI ID:22162732

Hoehm, S.; Rosenfeld, A. ^[1]; Krueger, J.; Bonse, J. ^[2]

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1. Max-Born-Institut fuer Nichtlineare Optik und Kurzzeitspektroskopie (MBI), Max-Born-Strasse 2A, D-12489 Berlin (Germany)
2. BAM Bundesanstalt fuer Materialforschung und - pruefung, Unter den Eichen 87, D-12205 Berlin (Germany)

The formation of laser-induced periodic surface structures (LIPSS) on fused silica upon irradiation with linearly polarized fs-laser pulses (50 fs pulse duration, 800 nm center wavelength) is studied experimentally using a transillumination femtosecond time-resolved (0.1 ps-1 ns) pump-probe diffraction approach. This allows to reveal the generation dynamics of near-wavelength-sized LIPSS showing a transient diffraction at specific spatial frequencies even before a corresponding permanent surface relief was observed. The results confirm that the ultrafast energy deposition to the materials surface plays a key role and triggers subsequent physical mechanisms such as carrier scattering into self-trapped excitons.

• OSTI ID: 22162732
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 5 Vol. 102; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BEAMS
DEPOSITION
DIFFRACTION
EXCITONS
IRRADIATION
LASER RADIATION
PERIODICITY
SILICA
SILICON COMPOUNDS
SURFACES
TIME RESOLUTION
TRANSIENTS
TRAPPING
WAVELENGTHS