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Title

Photo-acoustic sub-micrometer modifications of glass by pair of femtosecond laser pulses

Author(s)

Hayasaki, Yoshio;  Isaka, Mitsuhiro;  Takita, Akihiro;  Hasegawa, Satoshi;  Juodkazis, Saulius

Abstract

We present time-resolved studies of glass densification created by an acoustic phenomenon: collision of the transverse and longitudinal sound waves inside glass. Localization of the permanent denisfied region has a lateral cross section similar to 0.4 mu m and is approximately half of the wavelength of femtosecond laser pulses which were used to generate breakdown and launched shock waves inside glass. Controlled time delay between two closely spaced irradiation spots reveals dynamics and relaxation (electronic, thermal, stress) of glass after excitation. The observed phenomenon is important for femtosecond direct laser writing and recording of waveguide couplers using multiple beams.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Micro-Photonics

Source

Optical Materials Express, Vol. 2, no. 5 (May 2012), pp. 691-699

Publication year

2012

Keyword(s)

Acoustic phenomenon;  Femtosecond laser pulses;  Glass;  Glass densification

Publisher

Optical Society of America

ISSN

2159-3930

Publisher URL

http://dx.doi.org/10.1364/OME.2.000691

Copyright

Copyright © 2012 Optical Society of America. The published version is reproduced in accordance with the copyright policy of the publisher. This paper was published in Optics Materials Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/OME.2.000691. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Additional information

The authors acknowledge support from a Grant-in-Aid for Scientific Research (B) from the Ministry of Education, Culture, Sports, Science and Technology of Japan.

Full text

Peer reviewed