scholarly journals Production of temporally flat top UV laser pulses for SPARC photo-injector

2007 ◽  
Author(s):  
M. Petrarca ◽  
P. Musumeci ◽  
M. C. Mattioli ◽  
C. Vicario ◽  
G. Gatti ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Uv Laser ◽  
Title Production

Coherent Ring Currents in Chiral Aromatic Molecules Induced by Linearly Polarized UV Laser Pulses

2013 ◽  
Vol 543 ◽  
pp. 381-384 ◽  
Author(s):  
Manabu Kanno ◽  
Hirohiko Koho ◽  
Hirobumi Mineo ◽  
Sheng Hsien Lin ◽  
Yuichi Fujimura
Keyword(s):  
Aromatic Ring ◽  
Quantum Dynamics ◽  
Ring Current ◽  
Molecular System ◽  
Laser Pulses ◽  
Uv Laser ◽  
Aromatic Molecules ◽  
Ring Currents ◽  
Linearly Polarized ◽  
Coherent Ring

In recent years, laser control of electrons in molecular system and condensed matter has attracted considerable attention with rapid progress in laser science and technology [. In particular, control of π-electron rotation in photo-induced chiral aromatic molecules has potential utility to the next-generation ultrafast switching devices. In this paper, we present a fundamental principle of generation of ultrafast coherent ring currents and the control in photo-induced aromatic molecules. This is based on quantum dynamics simulations of π-electron rotations and preparation of unidirectional angular momentum by ultrashort UV laser pulses properly designed. For this purpose, we adopt 2,5-dichloro [(3,6) pyrazinophane (DCPH) fixed on a surface, which is a real chiral aromatic molecule with plane chirality. Here π electrons can be rotated along the aromatic ring clockwise or counterclockwise by irradiation of a linearly polarized laser pulse with the properly designed photon polarization direction and the coherent ring current with the definite direction along the aromatic ring is prepared. This is contrast to ordinary ring current in an achiral aromatic ring molecule with degenerate electronic excited state, which is prepared by a circularly polarized laser [2]. In this case, π electrons rotate along the Z-axis of the laboratory coordinates, while for the present case electrons rotate along the z-axis in molecular Cartesian coordinates. It should be noted that signals originated from the coherent ring currents prepared by linearly polarized ultrashort UV lasers are specific to the chiral molecule of interest.

CVD nanodiamond thin films as high yield photocathodes driven by UV laser pulses

2014 ◽  
Author(s):  
Jean-Paul Mazellier ◽  
Cyril Di Giola ◽  
Pierre Legagneux ◽  
Clement Hebert ◽  
Emmanuel Scorsonne ◽  
...  
Keyword(s):  
Thin Films ◽  
Laser Pulses ◽  
High Yield ◽  
Uv Laser

Excimer Laser Interaction with Metals

1992 ◽  
Vol 285 ◽  
Author(s):  
W.W. Duley ◽  
G. Kinsman
Keyword(s):  
Experimental Data ◽  
Laser Radiation ◽  
Excimer Laser ◽  
Metal Surfaces ◽  
Laser Pulses ◽  
Radiative Properties ◽  
Uv Laser ◽  
Laser Interaction ◽  
Excimer Laser Radiation

ABSTRACTExcimer laser radiation may be used to process metal surfaces in a variety of novel ways. The simplest of these involves the use of UV laser pulses for ablation. Ablation occurs as the result of both vaporization and hydrodynamical effects. Experimental data related to these processes will be discussed. In addition, it will be shown how specific irradiation regimes can yield metal surfaces with unique radiative properties.

Femtosecond UV-laser pulses to unveil protein–protein interactions in living cells

2015 ◽  
Vol 73 (3) ◽  
pp. 637-648 ◽  
Author(s):  
Francesco Itri ◽  
Daria M. Monti ◽  
Bartolomeo Della Ventura ◽  
Roberto Vinciguerra ◽  
Marco Chino ◽  
...  
Keyword(s):  
Protein Interactions ◽  
Laser Pulses ◽  
Living Cells ◽  
Uv Laser ◽  
Protein Protein Interactions

Laser interference ablation by ultrashort UV laser pulses via diffractive beam management

2020 ◽  
Vol 9 (1-2) ◽  
pp. 41-52 ◽  
Author(s):  
Jan-Hendrik Klein-Wiele ◽  
Andreas Blumenstein ◽  
Peter Simon ◽  
Jürgen Ihlemann
Keyword(s):  
Laser Pulses ◽  
Diffractive Optical Elements ◽  
Uv Laser ◽  
Laser Interference ◽  
Periodic Patterns ◽  
Optical Elements ◽  
Periodic Surface ◽  
Coherent Beams ◽  
Surface Patterns ◽  
Computer Generated Holograms

AbstractThe fabrication of periodic surface patterns on various materials by ultrashort ultraviolet (UV) laser pulses is reviewed. Laser interference ablation using two or more coherent beams leads to deterministic, strictly periodic patterns. The generation of the interfering beams is accomplished by diffractive optical elements like gratings, grating systems or computer-generated holograms. The recombination of the diffracted beams is performed by optical imaging or diffractive beam management. Ultrashort UV pulses are especially suited for generating micron- to submicron-sized deterministic periodic patterns on metals and semiconductors.

Controlled intramolecular H-transfer in malonaldehyde in the electronic ground state mediated through the conical intersection of 1nπ* and 1ππ* excited electronic states

2019 ◽  
Vol 21 (36) ◽  
pp. 20018-20030 ◽  
Author(s):  
K. R. Nandipati ◽  
Arun Kumar Kanakati ◽  
H. Singh ◽  
S. Mahapatra
Keyword(s):  
Ground State ◽  
Electronic States ◽  
Laser Pulses ◽  
Electronic Ground State ◽  
Conical Intersection ◽  
Uv Laser ◽  
Excited Electronic States ◽  
Electronic Ground

We report photo-isomerization of malonaldehyde in its electronic ground state (S0), mediated by coupled 1nπ*(S1)–1ππ*(S2) excited electronic states, accomplished with the aid of optimally designed ultraviolet (UV)-laser pulses.

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