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Surface roughness plays a critical role in ultrashort pulse laser ablation, particularly for industrial applications using burst mode operations, multi-pulse laser processing, and the generation of laser-induced periodic surface structures.…

High Energy Physics - Experiment · Physics 2025-04-25 Nicolas Thomae , Maximilian Stabroth , Julian Vollmann , Markus Döring , David Redka , Heinz Paul Huber , Michael Schmidt

Laser fields can be shaped on a subwavelength scale as to have a specific distribution in spin angular momentum, orbital structure, or topology. We study how these various features affect the strongly nonlinear electron dynamics.…

Quantum Physics · Physics 2020-12-30 Jonas Wätzel , Jamal Berakdar

Radiative feedback from luminous, massive stars during their formation is a key process in moderating accretion onto the stellar object. In the prior papers in this series, we showed that one form such feedback takes is UV line-driven disc…

Solar and Stellar Astrophysics · Physics 2018-12-26 N. D. Kee , R. Kuiper

We propose a feedback-assisted direct laser writing method to perform laser ablation of fiber optics devices in which their light-collection signal is used to optimize their properties. A femtosecond-pulsed laser beam is used to ablate a…

Shape servoing, a robotic task dedicated to controlling objects to desired goal shapes, is a promising approach to deformable object manipulation. An issue arises, however, with the reliance on the specification of a goal shape. This goal…

Robotics · Computer Science 2023-09-27 Bao Thach , Tanner Watts , Shing-Hei Ho , Tucker Hermans , Alan Kuntz

We present a semi-classical theory for light deflection by a coherent $\Lambda$-type three-level atomic medium in an inhomogeneous magnetic field or an inhomogeneous control laser. When the atomic energy levels (or the Rabi coupling by the…

Quantum Physics · Physics 2014-03-05 D. L. Zhou , Lan Zhou , R. Q. Wang , S. Yi , C. P. Sun

The effects of radiation reaction (RR) have been studied extensively by using the ultraintense laser interacts with the counter-propagating relativistic electron. At the laser intensity at the order of $10^{23}$ W/cm$^2$, the effects of RR…

Plasma Physics · Physics 2023-10-02 J. F. Ong , T. Moritaka , H. Takabe

We report on the experimental observation of selective delamination of semi-transparent materials on the example of yttria-stabilized zirconia ceramics upon femtosecond laser processing of its surface with low numerical aperture lens. The…

Applied Physics · Physics 2019-02-18 Frederik Kiel , Nadezhda M. Bulgakova , Andreas Ostendorf , Evgeny L. Gurevich

The impact of a laser pulse on a highly absorbing liquid drop can lead to a violent response: the drop is accelerated, strongly deforms, and eventually fragments. Shock waves, the ejection of matter, and even plasma formation can accompany…

We review on the theoretical status of intense laser orientation and alignment. The evolution of the rotational wave packet and its dynamics leading to orientation and alignment is the topic of the present discussion. The major part of the…

Atomic Physics · Physics 2021-04-14 Vijit V. Nautiyal , Sumana Devi , Ashish Tyagi , Bhawna Vidhani , Anjali Maan , Vinod Prasad

The folding of cellular monolayers pervades embryonic development and disease. It results from stresses out of the plane of the tissue, often caused by cell shape changes including cell wedging via apical constriction. These local cellular…

Soft Condensed Matter · Physics 2025-12-12 Pierre A. Haas , Stephanie S. M. H. Höhn

Although ultrafast laser materials processing has advanced at a breakneck pace over the last two decades, most applications have been developed with laser pulses at near-IR or visible wavelengths. Recent progress in mid-infrared (MIR)…

Materials Science · Physics 2020-01-08 Kevin Werner , Vitaly Gruzdev , Noah Talisa , Kyle Kafka , Drake Austin , Carl M. Liebig , Enam Chowdhury

We consider deflection of polarizable molecules by inhomogeneous optical fields, and analyze the role of molecular orientation and rotation in the scattering process. It is shown that molecular rotation induces spectacular rainbow-like…

Quantum Physics · Physics 2015-05-19 E. Gershnabel , I. Sh. Averbukh

Optically resonant high-index dielectric metasurfaces featuring Mie-type electric and magnetic resonances are usually fabricated by means of planar technologies, which limit the degrees of freedom in tunability and scalability of the…

The fabrication of laser-induced periodic surface structures (LIPSS) over extended areas at high processing speeds requires the use of high repetition rate femtosecond lasers. It is known that industrially relevant materials such as steel…

Roberts' model of lunar soil erosion beneath a landing rocket has been updated in several ways to predict the effects of future lunar landings. The model predicts, among other things, the number of divots that would result on surrounding…

Earth and Planetary Astrophysics · Physics 2021-04-13 Philip T. Metzger , John E. Lane , Christopher D. Immer

We suggest a technique based on the transfer of topological charge from applied laser radiation to directional and coherent optical fields generated in ladder-type excited atomic media to identify the major processes responsible for their…

Quantum Physics · Physics 2016-01-06 Alexander M. Akulshin , Russell J. McLean , Eugeniy E. Mikhailov , Irina Novikova

Equipartition magnetic fields can dramatically affect the polarization of radiation emerging from accretion disk atmospheres in active galactic nuclei. We extend our previous work on this subject by exploring the interaction between Faraday…

Astrophysics · Physics 2009-10-28 Eric Agol , Omer Blaes , Cristian Ionescu-Zanetti

The widespread use of metallic structures in space technology brings risk of degradation which occurs under space conditions. New types of materials dedicated for space applications, that have been developed in the last decade, are in…

Materials Science · Physics 2015-06-08 Maciej Sznajder , Ulrich Geppert , Mirosław Dudek

After giving a summary of the basic-theoretical concept of quantization of the electromagnetic field in the presence of dispersing and absorbing (macroscopic) bodies, their effect on spontaneous decay of an excited atom is studied. Various…

Quantum Physics · Physics 2016-08-16 Ho Trung Dung , Ludwig Knöll , Dirk-Gunnar Welsch