Asian Journal of Physics Vol 30, No 12 (2021) 1683-1688

High spatial frequency laser induced periodic surface structures

Mudasir H Dar1 and D Narayana Rao2
1Department of Physics, Govt. Degree College Anantnag-192 101, J&K, India
2School of Physics, University of Hyderabad, Prof. C R Rao Road, Gachibowli, Hyderabad-500 046, India
Dedicated to Prof D V G L N Rao


Laser induced periodic surface structure (LIPSS) is a phenomenon that can be generated on almost any material upon appropriate laser irradiation conditions. LIPSS has gained a lot of attraction during the last decade owing to the availability of ultrashort laser pulses. Laser direct writing is a simple technique that can be used to generate nanostructures, thereby allowing us to tailor optical, mechanical, and chemical surface properties. In the present study, we discuss the formation of Low Spatial Frequency LIPSS (LSFL) on metal surface upon irradiation with linearly polarized femtosecond (fs) laser pulses of 110 fs pulse duration and 800 nm wavelength (λ). We also explain that the formation mechanism of High Spatial Frequency LIPSS (HSFL) oriented parallel to the laser polarization direction, which could be due to the generation of higher harmonics of the exciting fundamental (λ) at the interface of the molten state and the bulk metal during the length of the laser pulse and their subsequent interaction with the surface plasmon polaritons (SPPs). Our investigation may find potential importance in laser writing technology towards development of surface nanostructure related applications. © Anita Publications. All rights reserved.
Keywords: Laser writing, Surface plasmon polaritons, Laser induced gratings.


Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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