Paper 14093-80
Paper 14093-80
Coherent nanoengineering of laser-induced periodic surface structures using single-pulse femtosecond laser writing
On demand | Presented live 15 April 2026 
Abstract
Femtosecond laser irradiation of molybdenum surfaces was performed to study the evolution of laser-induced periodic surface structures (LIPSS) under controlled pulse overlap. Using 35 fs, 800 nm pulses at 1 kHz, pulse overlap was varied from 0% to 100% via electronic shutter control and nanoscale scanning. Distinct morphologies emerged: isolated HSFL without overlap, coexisting HSFL–LSFL at ~62%, and highly ordered LSFL under full overlap. In static irradiation, pre-structured surfaces generated by earlier pulses supported surface plasmon polaritons that interfered with the incident field, reinforcing periodic energy localization, leading to coherent LIPSS formation.
Presenter
Indian Institute of Technology Kanpur (India)
Dr. Md Abu Taher is an Institute Postdoctoral Fellow at the Centre for Lasers and Photonics, Indian Institute of Technology Kanpur, India. He received his Ph.D. in Physics from the University of Hyderabad, specializing in ultrafast laser–matter interaction and femtosecond laser nanostructuring. His research focuses on coherent nanoengineering, single-pulse femtosecond laser writing, and laser-induced periodic surface structures (LIPSS). He has published in Optical Materials, IEEE Transactions on Nanotechnology, Optics & Laser Technology, ACS Applied Engineering Materials, Surfaces and Interfaces, and Journal of Physics D: Applied Physics, and presented at major conferences including CLEO, OSA Laser Congress, and FiO. His recent work explores coherent control in femtosecond laser writing for deterministic nanoscale structuring toward advanced photonic and sensing applications.
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