Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper CM1_5

Formation process of Femtosecond Laser-induced Nanogratings at High Repetition Rates

Not Accessible

Your library or personal account may give you access

Abstract

We investigate the formation process of femtosecond laser pulse induced nanogratings in fused silica. Three distinct stages of the growth from randomly arranged nanostructures to uniform periodic gratings are identified. These stages of the formation process are controlled mainly by the number of pulses applied to the sample. During the first formation stage, the exposed volume contains nonperiodic with an irregular shape. After several hundred pulses, stage II is reached. Here, periodicity starts to emerge, but there are still a lot of vacancies between the isolated modifications. Stage III occurs after roughly 1,000 laser pulses. The vacancies have been filled and a periodic nanograting is formed. The three different stages can be seen in Figure 1 a). The number of pulses required for each formation stage depends slightly on the pulse energy E, in agreement with the nanoplasmonic model for the formation of nanogratings [1,2]. Furthermore, in agreement with previous measurements [3] we observed a decrease of the nanograting period with increasing number of pulses. In addition, for a fixed number of pulses the period also decreases with increasing pulse energy. This is due to the fact that stage III of the formation process is reached at a smaller pulse number, and thus the decrease of the grating period has progressed further. With a wavelength of 515 nm, periods as low as 150 nm are obtained which is significantly smaller than the prediction of the nanoplasmonic model.

© 2011 Optical Society of America

PDF Article
More Like This
Nanogratings and molecular oxygen formation during femtosecond laser irradiation in silica

M. Lancry, B. Poumellec, K. Cook, and J. Canning
C229 Conference on Lasers and Electro-Optics/Pacific Rim (CLEOPR) 2011

Formation of disruptions in molten fused silica induced by heat accumulation of ultrashort laser pulses at high repetition rates

S. Richter, F. Burmeister, F. Zimmermann, S. Döring, A. Tünnermann, and S. Nolte
CM_6_6 The European Conference on Lasers and Electro-Optics (CLEO_Europe) 2013

Bragg spectral response of femtosecond laser induced nanogratings inside fused silica glass

Jianzhao Li, Moez Haque, and Peter R. Herman
CTuAA3 CLEO: Science and Innovations (CLEO_SI) 2011

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 Optica member, or as an authorized user of your institution.

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

Select as filters


Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved