ANALYSIS OF PERIODIC NANOSTRUCTURES FORMATION ON A GOLD SURFACE UNDER EXPOSURE TO ULTRASHORT LASER PULSES NEAR THE MELTING THRESHOLD
Annotation
Subject of Study. The mechanism of surface restructuring by ultrashort laser pulses involves a lot of fast, non-equilibrium, and interrelated processes while the solid is in a transient state. As a result, the analysis of the experimental data cannot cover all the mechanisms of nanostructuring. We present a direct comparison of a simulation and experimental results of surface nanomodification induced by a single laser pulse. Method. The experimental results were obtained by using a mask projection setup with a laser wavelength equal to 248 nm and a pulse length equal to 1.6 ps. This setup is used to produce an intensity grating on a gold surface with a sinusoidal shape and a period of 500 nm. The formed structures were analyzed by a scanning and transmission electron microscope, respectively. Then a hybrid atomistic-continuum model capable of capturing the essential mechanisms responsible for the nanostructuring process was used for modeling the interaction of the laser pulse with a thick gold target. Main Results. A good agreement between simulation and experimental data justifies the proposed approach as a powerful tool revealing the physics behind the nanostructuring process at a gold surface and providing a microscopic insight into the dynamics of the structuring processes of metals in general. The presented model, therefore, is an important step towards a new computational tool in predicting materials response to an ultrashort laser pulse on the atomic scale and properties of the modified surfaces. Practical Relevance. This detailed understanding of the dynamics of the process will pave the way towards pre-designed topologies for functionalized surfaces on the nano- and micro-scales.
Keywords
Постоянный URL
Articles in current issue
- AUTOMATIC SPEECH RECOGNITION – THE MAIN STAGES OVER LAST 50 YEARS
- PHOTOELECTRIC AND PHOTOMAGNETIC RESPONSE OF INDIUM-TIN OXIDE FILMS
- POTENTIALS OF RAMAN BASED SENSOR SYSTEM FOR AN ONLINE ANALYSIS OF HUMAN INHALE AND EXHALE
- PERFORMANCE OPTIMIZATION OF THE DIODE-PUMPED SOLID-STATE LASER FOR SPACE APPLICATIONS
- EXPERIMENTAL COMPARISON OF HOMODYNE DEMODULATION ALGORITHMS FOR PHASE FIBER-OPTIC SENSOR
- DIRECTIVITY PATTERN INVESTIGATION OF DUAL FIBER OPTIC HYDROPHONE
- SUBJOULE DIODE-PUMPED YTTERBIUM-ERBIUM GLASS LASER WITH CAVITY DUMPING FOR CATARACT EXTRACTION
- AUTOMATION OF LENSES CENTERING AT GLUING IN THE FRAME
- СREATION OF CORRELATION FUNCTIONS OF LINEAR CONTINUOUS SYSTEMS BASED ON THEIR FUNDAMENTAL MATRICES
- СONTROL FOR QUADROCOPTER WITH COMPENSATION OF WIND DISTURBANCE
- СHIRAL RECOGNITION OF CYSTEINE MOLECULES BY CHIRAL CdSe AND CdS QUANTUM DOTS
- MICROSTRUCTURING OF SILICON SINGLE CRYSTALS BY FIBER LASER IN HIGH-SPEED SCANNING MODE
- DETERMINATION OF SATURATION VAPOR PRESSURE OF LOW VOLATILE SUBSTANCES THROUGH THE STUDY OF EVAPORATION RATE BY THERMOGRAVIMETRIC ANALYSIS
- STUDY OF CURRENT APPROACHES FOR WEB PUBLISHING OF OPEN SCIENTIFIC DATA
- PERFORMANCE EVALUATION OF SD-CARDS BY "SYSTEM-ON-CHIP" TECHNOLOGY
- MODELS OF LIVE MIGRATION WITH ITERATIVE APPROACH AND MOVE OF VIRTUAL MACHINES
- DOMAIN-DRIVEN DESIGN APPLICATION AND IMPLEMENTATION OF INFORMATION SYSTEMS FOR CLIENTS QUEUING SUBJECT AREAS
- INTEGRITY MONITORING IMPLEMENTATION FOR THE OPERATING SYSTEM IMAGE LOADED THROUGH A NETWORK TO THE THIN CLIENT
- METHOD AND ABSTRACT MODEL FOR CONTROL AND ACCESS RIGHTS BY REQUESTS REDIRECTION
- SMARTPHONE-BASED APPROACH TO ADVANCED DRIVER ASSISTANCE SYSTEM (ADAS) RESEARCH AND DEVELOPMENT
- LTE OFFLOADING THROUGH WiFi NETWORKS
- METHOD OF TRAINING EXAMPLES IN SOLVING INVERSE ILL-POSED PROBLEMS OF SPECTROSCOPY
- ARBITRARY INTERACTION OF PLANE SUPERSONIC FLOWS
- LOGICAL CONDITIONS ANALYSIS METHOD FOR DIAGNOSTIC TEST RESULTS DECODING APPLIED TO COMPETENCE ELEMENTS PROFICIENCY
- SYNTHESIS OF 2,6-DIAMINOPYRIDINE-4-NITROPHENOL (2,6DAP4N) COCRYSTAL NANOPARTICLES BY LASER ABLATION METHOD