Collisional absorption of laser light in under-dense plasma: The role of Coulomb logarithm

The role of collisional absorption is supposed to be important in the beginning of the interaction between a laser pulse and matter. Later on, collective absorption phenomenons take place. The scope of this paper is to present first results about the so-called AC-run-away effect, defined as a “sudden transition from collisional absorption regime to a collective one.” For this purpose, we use a simple model based on ballistic theory. The delicate point concerning the Coulomb logarithm is also studied: we propose for it a convenient cutoff and an ensemble averaged Coulomb logarithm fit formula. Another application of the model presented here is the normal skin effect. We show some sensible differences between the present approach and those based on more common and rough collision frequency formulas.

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The role of FA:K+ and FA:Na+ defects in laser light generation and color image formation at the (100) and (110) surface sites of AgCl and AgBr.

Physical Chemistry Chemical Physics ◽

10.1039/b311839h ◽

2004 ◽

Vol 6 (3) ◽

pp. 626 ◽

Cited By ~ 13

Author(s):

A. S. Shalabi ◽

I. A. Z. Al-Ansari ◽

K. Kh. Al-Naimi ◽

M. A. Kamel ◽

A. M. El-Mahdy ◽

...

Keyword(s):

Laser Light ◽

Color Image ◽

Image Formation ◽

Surface Sites ◽

Light Generation

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90° laser light scattering by a dense plasma focus

Physics Letters A ◽

10.1016/0375-9601(69)90770-1 ◽

1969 ◽

Vol 29 (1) ◽

pp. 19-20 ◽

Cited By ~ 16

Author(s):

J.P. Baconnet ◽

G. Cesari ◽

A. Coudeville ◽

J.P. Watteau

Keyword(s):

Light Scattering ◽

Plasma Focus ◽

Laser Light ◽

Dense Plasma ◽

Laser Light Scattering ◽

Dense Plasma Focus

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Measurement of small-signal absorption coefficient and absorption cross section of collagen for 193-nm excimer laser light and the role of collagen in tissue ablation

Applied Optics ◽

10.1364/ao.43.005443 ◽

2004 ◽

Vol 43 (29) ◽

pp. 5443 ◽

Cited By ~ 17

Author(s):

Brian T. Fisher ◽

David W. Hahn

Keyword(s):

Absorption Coefficient ◽

Excimer Laser ◽

Cross Section ◽

Absorption Cross Section ◽

Laser Light ◽

Tissue Ablation ◽

Small Signal ◽

Absorption Cross ◽

193 Nm

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Pulsed Laser Light Forces Cancer Cells to Absorb Anticancer Drugs – The Role of Water in Nanomedicine

Artificial Cells Blood Substitutes and Biotechnology ◽

10.3109/10731199.2010.516262 ◽

2010 ◽

Vol 39 (3) ◽

pp. 169-173 ◽

Cited By ~ 8

Author(s):

Andrei P. Sommer ◽

Dan Zhu ◽

Adam R. Mester ◽

Horst-Dieter Försterling

Keyword(s):

Cancer Cells ◽

Anticancer Drugs ◽

Laser Light ◽

Pulsed Laser

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Response of laser-localized structures to external perturbations in coupled semiconductor microcavities

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2014.0004 ◽

2014 ◽

Vol 372 (2027) ◽

pp. 20140004 ◽

Cited By ~ 4

Author(s):

M. Turconi ◽

M. Giudici ◽

S. Barland

Keyword(s):

Semiconductor Lasers ◽

Laser Light ◽

Light Emission ◽

Localized States ◽

Time Resolved ◽

External Perturbations ◽

Localized Structures ◽

Coupled Lasers ◽

The Stability

Laser-localized structures have been observed in several experiments based on broad-area semiconductor lasers. They appear as bounded regions of laser light emission which can exist independently of each other and are expected to be commuted via external optical perturbations. In this work, we perform a statistical analysis of time-resolved commutation experiments in a system of coupled lasers and show the role of wavelength, polarization and pulse energy in the switching process. Furthermore, we also analyse the response of the system outside of the stability region of laser-localized states in search of an excitable response. We observe not only a threshold separating two types of responses, but also a strong variability in the system's trajectory when returning to the initial stable fixed point.

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