Journal
OPTICS EXPRESS
Volume 20, Issue 12, Pages 12997-13005Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.20.012997
Keywords
-
Categories
Funding
- Saint Etienne Metropole, of the Agence Nationale de la Recherche, France [ANR-07-BLANC-0301]
- National Agency for Scientific Research, Romania [490/2011]
Ask authors/readers for more resources
Employing a method of in-situ control we propose an approach for the optimization of self-arranged nanogratings in bulk fused silica under the action of ultrashort laser pulses with programmable time envelopes. A parametric study of the influence of the pulse duration and temporal form asymmetries is given. Using the diffraction properties of the laser-triggered subwavelength patterns we monitor and regulate the period and the quality of the periodic nanoscale arrangement via the effective nonlinear excitation dose. Periodicity tuning on tens of nanometers can be achieved by pulse temporal variations, with a minimum around 0.7 ps at the chosen powers. Equally, strong sensitivity to pulse asymmetries is observed. The driving factor is related to increasing carrier densities due to nonlinear confinement and the development of extended nanoroughness domains upon multiple exposure, creating a pulse-dependent effective accumulation dose via a morpho-dimensional effect. The result may impact the associated optical functions. (C) 2012 Optical Society of America
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available