Control of periodic surface structures on silicon by combined temporal and polarization shaping of femtosecond laser pulses

التفاصيل البيبلوغرافية
العنوان: Control of periodic surface structures on silicon by combined temporal and polarization shaping of femtosecond laser pulses
المؤلفون: Emmanuel Stratakis, Fotis Fraggelakis, Panagiotis A. Loukakos
المصدر: Applied Surface Science. 444:154-160
بيانات النشر: Elsevier BV, 2018.
سنة النشر: 2018
مصطلحات موضوعية: Materials science, business.industry, Linear polarization, General Physics and Astronomy, Michelson interferometer, Pulse duration, 02 engineering and technology, Surfaces and Interfaces, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Polarization (waves), Laser, 01 natural sciences, Pulse shaping, Surfaces, Coatings and Films, law.invention, 010309 optics, Optics, law, 0103 physical sciences, Femtosecond, 0210 nano-technology, business, Group delay and phase delay
الوصف: We demonstrate the capability to exercise advanced control on the laser-induced periodic surface structures (LIPSS) on silicon by combining the effect of temporal shaping, via tuning the interpulse temporal delay between double femtosecond laser pulses, along with the independent manipulation of the polarization state of each of the individual pulses. For this, cross-polarized (CP) as well as counter-rotating (CR) double circularly polarized pulses have been utilized. The pulse duration was 40 fs and the central wavelength of 790 nm. The linearly polarized double pulses are generated by a modified Michelson interferometer allowing the temporal delay between the pulses to vary from Δτ = −80 ps to Δτ = +80 ps with an accuracy of 0.2 fs. We show the significance of fluence balance between the two pulse components and its interplay with the interpulse delay and with the order of arrival of the individually polarized pulse components of the double pulse sequence on the final surface morphology. For the case of CR pulses we found that when the pulses are temporally well separated the surface morphology attains no axial symmetry. But strikingly, when the two CP pulses temporally overlap, we demonstrate, for the first time in our knowledge, the detrimental effect that the phase delay has on the ripple orientation. Our results provide new insight showing that temporal pulse shaping in combination with polarization control gives a powerful tool for drastically controlling the surface nanostructure morphology.
تدمد: 0169-4332
DOI: 10.1016/j.apsusc.2018.02.258
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::56ed1c6708d9b9322162db91f229c071
https://doi.org/10.1016/j.apsusc.2018.02.258
Rights: CLOSED
رقم الانضمام: edsair.doi...........56ed1c6708d9b9322162db91f229c071
قاعدة البيانات: OpenAIRE
الوصف
تدمد:01694332
DOI:10.1016/j.apsusc.2018.02.258