Laser Control of Electrons in Molecules

1999 ◽  
pp. 177-190
Author(s):  
André D. Bandrauk ◽  
Hengtai Yu
Keyword(s):  
Laser Control

scholarly journals Electron Symmetry Breaking during Attosecond Charge Migration Induced by Laser Pulses: Point Group Analyses for Quantum Dynamics

Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 205
Author(s):  
Dietrich Haase ◽  
Gunter Hermann ◽  
Jörn Manz ◽  
Vincent Pohl ◽  
Jean Christophe Tremblay
Keyword(s):  
Laser Pulse ◽  
Symmetry Breaking ◽  
Electric Fields ◽  
Quantum Dynamics ◽  
Point Group ◽  
Laser Pulses ◽  
Charge Migration ◽  
Laser Control ◽  
The One ◽  
Superposition States

Quantum simulations of the electron dynamics of oriented benzene and Mg-porphyrin driven by short (<10 fs) laser pulses yield electron symmetry breaking during attosecond charge migration. Nuclear motions are negligible on this time domain, i.e., the point group symmetries G = D6h and D4h of the nuclear scaffolds are conserved. At the same time, the symmetries of the one-electron densities are broken, however, to specific subgroups of G for the excited superposition states. These subgroups depend on the polarization and on the electric fields of the laser pulses. They can be determined either by inspection of the symmetry elements of the one-electron density which represents charge migration after the laser pulse, or by a new and more efficient group-theoretical approach. The results agree perfectly with each other. They suggest laser control of symmetry breaking. The choice of the target subgroup is restricted, however, by a new theorem, i.e., it must contain the symmetry group of the time-dependent electronic Hamiltonian of the oriented molecule interacting with the laser pulse(s). This theorem can also be applied to confirm or to falsify complementary suggestions of electron symmetry breaking by laser pulses.

scholarly journals Analytical solution of the optimal laser control problem in two-level systems

2004 ◽  
Vol 37 (12) ◽  
pp. 2569-2575 ◽  
Author(s):  
Martin E Garcia ◽  
Ilia Grigorenko
Keyword(s):  
Analytical Solution ◽  
Control Problem ◽  
Two Level Systems ◽  
Laser Control

Laser control of harmonics and electrons in molecules

1995 ◽  
Author(s):  
Andre D. Bandrauk ◽  
Tao Zuo
Keyword(s):  
Laser Control

Experimental Comparison of Parameters of Loop Antennas with and Without Laser Control

2021 ◽  
Author(s):  
S. Yu. Kazantsev ◽  
P. A. Titovets ◽  
A. I. Sattarova ◽  
A. A. Pishcherkov ◽  
N. S. Bekushev
Keyword(s):  
Experimental Comparison ◽  
Laser Control ◽  
Loop Antennas

Laser Control of Wavepacket Photodissociation and Photoisomerization Dynamics in Isolated Molecules

2007 ◽  
Author(s):  
Leticia González ◽  
Tamás Rozgonyi ◽  
David Ambrosek ◽  
Guillermo Pérez-Hernández ◽  
George Maroulis ◽  
...  
Keyword(s):  
Laser Control ◽  
Isolated Molecules

The evolution of a large laser control system — From Shiva to Nova

1979 ◽  
Vol 1 (3) ◽  
pp. 3-10 ◽  
Author(s):  
Gregory J. Suski ◽  
Frederick W. Holloway
Keyword(s):  
Control System ◽  
Laser Control

scholarly journals Resultats A Court Terme De La Trabeculoplastie Selective Au Laser Chez Les Patients Togolais

2017 ◽  
Vol 13 (30) ◽  
pp. 271
Author(s):  
Dzidzinyo Kossi ◽  
Djagnikpo Akouete ◽  
Ayena Koffi Didier ◽  
Vonor Kokou ◽  
Maneh, Nidain ◽  
...  
Keyword(s):  
Selective Laser Trabeculoplasty ◽  
Treatment Results ◽  
Short Term ◽  
Laser Trabeculoplasty ◽  
The Mean ◽  
Laser Control ◽  
Pre Treatment ◽  
Primary Glaucoma ◽  
Reduction Percentage

Aim: To check the short-term tonometric results of SLT in the treatment of primary glaucoma at the open angle and in charge of ocular hypertonias in Togolese people. Methods: A retrospective study was carried out in an ophthalmology center. The first 130 eyes of 72 patients benefited from the SLT laser procedure. The tonometric controls work object focus on follow-up at 1, 3, and 6 months post laser treatment. Results: 130 eyes of 72 patients were collected. The average age of the patients was 49.74 years (± 17.45) and the ages vary between 10 and 85 years. The average IOP of the laser before the laser (J0) was (24.99 ± 8.41) mm Hg. The mean IOP at the post-laser control at 1 month was (18.79 ± 3.73) mm Hg. The average IOP for the post-laser control at 3 months was (18.44 ± 3.81) mm Hg. The mean IOP at the post-laser control at 6 months was (18.13 ± 3.63) mm Hg. The percentage reduction in intraocular pressure compared to IOP was pretreated from 20.2% to 1 month; 22.1% at 3 months; and 23.3% at 6 months. In 1 month, 49.2% of the eyes we treated showed a reduction in IOP of less than 20% compared to IOP pretreatment. After 3 months and 6 months, it was 55.4% higher. Also, 52.3% have a PIO reduction percentage which is greater than or equal to 20% compared to pre-treatment IOP. Discussion: Selective laser trabeculoplasty, most especially, is interesting in ocular hypertonies. Treatment of over 180 ° allows one patient out of two to have a pressure reduction that is greater than or equal to 20%. Conclusion: The SLT presents a significant advantage for our glaucomatous patients.

scholarly journals Implementation of double-pulse laser control in optical Kerr effect spectroscopy

2013 ◽  
Vol 478 ◽  
pp. 012021
Author(s):  
V G Nikiforov ◽  
A G Shmelev ◽  
G M Safiullin ◽  
V S Lobkov ◽  
V V Samartsev
Keyword(s):  
Pulse Laser ◽  
Kerr Effect ◽  
Double Pulse ◽  
Optical Kerr Effect ◽  
Laser Control ◽  
Double Pulse Laser
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