Abstract

Large-area high-spatial-frequency patterns (HSFLs) of λ/6 periodicity have been generated by a nanojoule-femtosecond laser scanning technique (80MHz, 170fs, 700950nm) at the silicon–air interface. The excellent large-area uniformity allowed reproducible and accurate measurements of the periodicity. Variation of experimental param eters as illumination geometry, and pulse energy and number showed no influence on the ripple spacing. A wavelength dependence was observed and compared to current models of HSFL formation. A particular second-armonic model was found to match the results best but needs to take into account transient changes in the refractive index under laser exposure. A second-harmonic mechanism is further supported by direct spectroscopic observation.

© 2011 Optical Society of America

Full Article  |  PDF Article
Related Articles
Sub-100 nm nanostructuring of silicon by ultrashort laser pulses

R Le Harzic, H. Schuck, D. Sauer, T. Anhut, I. Riemann, and K. König
Opt. Express 13(17) 6651-6656 (2005)

Superior local conductivity in self-organized nanodots on indium-tin-oxide films induced by femtosecond laser pulses

Chih Wang, Hsuan-I Wang, Wei-Tsung Tang, Chih-Wei Luo, Takayoshi Kobayashi, and Jihperng Leu
Opt. Express 19(24) 24286-24297 (2011)

Periodic nanostructures on Si(100) surfaces generated by high-repetition rate sub-15 fs pulsed near-infrared laser light

Martin Straub, Maziar Afshar, Dara Feili, Helmut Seidel, and Karsten König
Opt. Lett. 37(2) 190-192 (2012)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription