Intense-field interaction regime with weak laser pulses and localized plasmonic enhancement: Reference-free demonstration by 3rd- and 5th-order infrared spectroscopies

2019 ◽  
Vol 151 (12) ◽  
pp. 121103 ◽  
Author(s):  
Robert T. Mackin ◽  
Bar Cohn ◽  
Lev Chuntonov ◽  
Igor V. Rubtsov
Keyword(s):  
Laser Pulses ◽  
Plasmonic Enhancement ◽  
Field Interaction ◽  
Intense Field ◽  
Interaction Regime

scholarly journals Ultrafast F2− photodissociation by intense laser pulses: a time-resolved fragment imaging study

2019 ◽  
Vol 205 ◽  
pp. 09012
Author(s):  
Abhishek Shahi ◽  
Yishai Albeck ◽  
Daniel Strasser
Keyword(s):  
Single Photon ◽  
Imaging Study ◽  
Laser Pulses ◽  
Intense Laser ◽  
Time Resolved ◽  
Intense Field ◽  
Intense Laser Pulses ◽  
Ultrafast Pulses ◽  
Coincidence Imaging ◽  
Field Dissociation

We present time-resolved coincidence imaging of F2− photodissociation by 400nm and intense 800nm ultrafast pulses. Coincidence fragment imaging reveals parallel and perpendicular single photon dissociation on 2Σg+ and 2πg states, and additional intense-field dissociation features.

scholarly journals Ultrafast pulse shaping modulates perceived visual brightness in living animals

2021 ◽  
Vol 7 (18) ◽  
pp. eabe1911
Author(s):  
Geoffrey Gaulier ◽  
Quentin Dietschi ◽  
Swarnendu Bhattacharyya ◽  
Cédric Schmidt ◽  
Matteo Montagnese ◽  
...  
Keyword(s):  
Pulse Shaping ◽  
Single Pulse ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Light Pulses ◽  
Light Excitation ◽  
Interaction Regime ◽  
Dynamics Simulations ◽  
Electric Signals ◽  
Multiphoton Interaction

Vision is usually assumed to be sensitive to the light intensity and spectrum but not to its spectral phase. However, experiments performed on retinal proteins in solution showed that the first step of vision consists in an ultrafast photoisomerization that can be coherently controlled by shaping the phase of femtosecond laser pulses, especially in the multiphoton interaction regime. The link between these experiments in solution and the biological process allowing vision was not demonstrated. Here, we measure the electric signals fired from the retina of living mice upon femtosecond multipulse and single-pulse light stimulation. Our results show that the electrophysiological signaling is sensitive to the manipulation of the light excitation on a femtosecond time scale. The mechanism relies on multiple interactions with the light pulses close to the conical intersection, like pump-dump (photoisomerization interruption) and pump-repump (reverse isomerization) processes. This interpretation is supported both experimentally and by dynamics simulations.

Intense-field dissociation dynamics of D+2molecular ions using ultrafast laser pulses

2007 ◽  
Vol 40 (13) ◽  
pp. 2607-2619 ◽  
Author(s):  
J McKenna ◽  
M Suresh ◽  
D S Murphy ◽  
W A Bryan ◽  
L-Y Peng ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Ultrafast Laser ◽  
Ultrafast Laser Pulses ◽  
Intense Field ◽  
Dissociation Dynamics ◽  
Field Dissociation

scholarly journals Non-Fourier effects in the thermal protection against high-power ultra-fast laser pulses

2018 ◽  
Vol 70 ◽  
pp. 03008
Author(s):  
Marcin Lenarczyk ◽  
Roman Domański
Keyword(s):  
Heat Transfer ◽  
Laser Beam ◽  
High Power ◽  
Numerical Scheme ◽  
Thermal Protection ◽  
Laser Pulses ◽  
Heat Transfer Process ◽  
Interaction Regime ◽  
The Military ◽  
Scientific Fields

In this paper the heat transfer process between laser beam and a solid body is investigated in the context of the protective materials, which can be used in the military, manufacturing or scientific fields. An ultra-fast high-power interaction regime is being considered. Non-Fourier effects are taken into account. To simulate effects, which can be of significance in the protective materials design, Cattaneo-Vernotte equation is being solved by means of MacCormack explicit second order numerical scheme. Selected results are discussed in detail.

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