Results 71 to 80 of about 1,920,107 (363)

Femtosecond Single‐ and Double‐Pulse Fabrication of Periodic Nanostructures on Stainless Steel for Surface‐Enhanced Raman Spectroscopy

Advanced Engineering Materials, EarlyView.
Periodic submicron features are fabricated on 304 stainless steel using single and double femtosecond laser pulses. By adjusting polarization, fluence, and inter‐pulse delay, 1D and 2D nanostructures are formed. Enhanced hydrophobicity and dense surface‐enhanced Raman spectroscopy hotspots enable analyte detection down to 10−10 M with good ...
Balaji Baskar, Atiqul Islam Ahad, Carla Berrospe‐Rodriguez, Guillermo Aguilar   +3 more
wiley   +1 more source

Possible surface plasmon polariton excitation under femtosecond laser irradiation of silicon

, 2013
The mechanisms of ripple formation on silicon surface by femtosecond laser pulses are investigated. We demonstrate the transient evolution of the density of the excited free-carriers.
Born M., Jackson J., Maier S. A., Marc Sentis, Pankove J. I., Raether H., Rémi Torres, Sze S., Tatiana E. Itina, Thibault J.-Y. Derrien, Thierry Sarnet   +10 more
core   +3 more sources

Structurally Colored Physically Unclonable Functions with Ultra‐Rich and Stable Encoding Capacity

Advanced Functional Materials, Volume 35, Issue 12, March 18, 2025.
This study reports a design strategy for generating bright‐field resolvable physically unclonable functions with extremely rich encoding capacity coupled with outstanding thermal and chemical stability. The optical response emerges from thickness‐dependent structural color formation in ZnO features, which are fabricated by physical vapor deposition ...
Abidin Esidir, Miaoning Ren, Sami Pekdemir, Mustafa Kalay, Nilgun Kayaci, Nail Gunaltay, Hakan Usta, Xian Huang, Mustafa Serdar Onses   +8 more
wiley   +1 more source

Longtitudinal electron beam diagnostics via upconversion of THz to visible radiation [PDF]

, 2009
Longitudinal electro-optic electron bunch diagnostics has been successfully applied at several accelerators. The electro-optic effect can be seen as an upconversion of the Coulomb field of the relativistic electron bunch (THz radiation) to the visible ...
Berden, G., Gillespie, W. A., Jamison, S. P., MacLeod, Allan M., Phillips, P. J., van der Meer, A. F. G.   +5 more
core  

Heat Conduction Modulation in Incommensurate Twisted Stacking of Transition‐Metal Dichalcogenide

Advanced Functional Materials, EarlyView.
The interlayer thermal conductance in twisted bilayer TMDs is initially investigated experimentally by the thermoreflectance method. The overlap of lattice vibrations within individual layers and the interlayer interactions, as elucidated through both Raman spectroscopy and molecular dynamics simulations, are demonstrated to be critical factors in ...
Bin Xu, Meng An, Satoru Masubuchi, Yuanzhe Li, Rulei Guo, Tomoki Machida, Junichiro Shiomi   +6 more
wiley   +1 more source

C$_{60}$ in intense femtosecond laser pulses: nonlinear dipole response and ionization

, 2001
We study the interaction of strong femtosecond laser pulses with the C$_{60}$ molecule employing time-dependent density functional theory with the ionic background treated in a jellium approximation.
A. Macchi, C. A. Ullrich, C. A. Ullrich, C. A. Ullrich, C. J. Joachain, D. Bauer, D. Bauer, E. E. B. Campbell, E. S. Smyth, Erich Runge, F. Alasia, F. Calvayrac, F. Ceccherini, F. Cornolti, F. H. M. Faisal, G. Seifert, George F. Bertsch, H. G. Muller, I. V. Hertel, J. S. Parker, John P. Perdew, K. Yabana, M. Brack, M. J. Puska, M. Petersilka, M. Protopapas, M. Tchaplyguine, R. M. Dreizler, S. Hunsche, V. A. Vshivkov   +29 more
core   +1 more source

5,11‐Di(thiophen‐2‐yl)Tetracene: A Novel Tetracene Derivative for Efficient Singlet Fission with Enhanced Physical and Chemical Stability in Thin Films

Advanced Functional Materials, EarlyView.
In this work, a new tetracene derivative, 5,11‐di(thiophen‐2‐yl)tetracene (2T‐Tc) is introduced, exhibiting enhanced physical and chemical stability, and retaining favorable singlet fission kinetics with near unity triplet pair yield in thin films.
Jieun Lee, Jeoungin Yi, Hyerim Hong, Yu Jin Lee, Feifei Fang, Sangjun Lee, Won Bo Lee, Sungyoung Yun, Kyung‐Bae Park, Jeong‐Il Park, Dongho Kim, Woojae Kim   +11 more
wiley   +1 more source

Modelling and experiments of self-reflectivity under femtosecond ablation conditions

, 2014
We present a numerical model which describes the propagation of a single femtosecond laser pulse in a medium of which the optical properties dynamically change within the duration of the pulse.
Dijkhuis, J. I., Krol, D. M., van Oosten, D., Wolbers, S. A., Zhang, H.   +4 more
core   +1 more source

Multi‐Pathway Upconversion Emission in Symmetry‐Broken Nanocavities: Broadband Multiresonant Enhancement and Anti‐Correlated Interfacial Sensitivity

Advanced Functional Materials, EarlyView.
Symmetry‐broken plasmonic nanoantenna arrays achieve broadband multiresonant enhancement of second harmonic generation (SHG), third harmonic generation (THG), and upconversion photoluminescence (UCPL), under femtosecond laser excitation across the near‐infrared range (1000–1600 nm).
Elieser Mejia, Yuming Zhao, Meitong Nie, Benjamin Pittelkau, Aditya Garg, Junyeob Song, Wenqi Zhu, Henri Lezec, Amit Agrawal, Wei Zhou   +9 more
wiley   +1 more source

Optical Control of the Thermal Conductivity in BaTiO3

Advanced Functional Materials, EarlyView.
Light‐driven manipulation of thermal conductivity in archetypal ferroelectric, BaTiO3, offers a novel and effective approach for the dynamical control of the heat flux, with potential applications in thermal management and phonon‐based logic. Abstract Achieving dynamic control over thermal conductivity remains a formidable challenge in condensed matter
Claudio Cazorla, Carlos Escorihuela‐Sayalero, Jesús Carrete, Jorge Íñiguez‐González, Riccardo Rurali   +4 more
wiley   +1 more source