Abstract

The effect of laser irradiation on nanoscale morphology of ZnO thin films has been studied in the regime of high-density electronic excitation. A femtosecond KrF laser (248 nm, 450 fs) was used to irradiate the films prepared by solgel (SG) and pulsed laser deposition (PLD) methods with fluences below ablation threshold and above that of Mott density. This regime corresponds to electron-hole plasma (EHP) creation, resulting in a specific nanostructuring of monocrystalline ZnO surfaces. A strong nanoscale modification of thin films in the domain of laser fluences 105mJ/cm2<E<180mJ/cm2 has been evidenced. While PLD films maintain a smooth surface with nanoholes arranged in straight and zig–zag lines (similar to ZnO monocrystals) surrounded by domains of 100nm size, SG films show the flake-like structure with an open porosity. This behavior can be related to the density of the prepared films.

© 2014 Optical Society of America

Full Article  |  PDF Article
More Like This
Effect of laser polarization and crystalline orientation on ZnO surface nanostructuring in the regime of high-density electronic excitation

Luc Museur, Alexandra Manousaki, Demetrios Anglos, Thierry Chauveau, and Andrei Kanaev
J. Opt. Soc. Am. B 31(11) C44-C47 (2014)

Femtosecond UV laser non-ablative surface structuring of ZnO crystal: impact on exciton photoluminescence

Luc Museur, Jean-Pierre Michel, Patrick Portes, Apostolis Englezis, Andreas Stassinopoulos, Demetrios Anglos, and Andrei V. Kanaev
J. Opt. Soc. Am. B 27(3) 531-535 (2010)

Electron–hole plasma induced band gap renormalization in ZnO microlaser cavities

Jun Dai, Chunxiang Xu, Toshihiro Nakamura, Yueyue Wang, Jitao Li, and Yi Lin
Opt. Express 22(23) 28831-28837 (2014)

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 (7)

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