Dynamics of interactions of short laser pulses with atoms: role of close-coupling effects

ABSTRACTThe preparation of AlSb thin films by pulsed laser annealing of Al/Sb sandwiches is studied in order to resolve some past controversy about the temperature rise induced by the laser pulse. Using 1000 Ȧ thick two layer films supported by TEM grids, we investigate the energy threshold for complete transformation as a function of pulse duration from 15 nsec to 100 msec, and of ambient temperature from −100°C to 250°C.We thence calculate the temperature effect directly induced by the laser to be about 930°C, or approximately the melting point of the metals, whereas inert gas furnace anneals of comparable films show transformation at this temperature occuring only in about 100 sec. We discuss the isoenergetic nature of the system for short laser pulses and the role of the heat of transformation, and thus conclude that the reaction is thermally triggered by the laser pulse but is to some extent self-sustaining via the heat of transformation locally distributed. This model is also shown to have equal validity for the systems CdTe, CdSe and AlAs.

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Response to “Comment on ‘Self-focusing and channel-coupling effects on short laser pulses propagating in a plasma channel’ ” [Phys. Plasmas 12, 094702 (2005)]

Physics of Plasmas ◽

10.1063/1.2042227 ◽

2005 ◽

Vol 12 (9) ◽

pp. 094703 ◽

Cited By ~ 1

Author(s):

Pallavi Jha ◽

Ajay K. Upadhyaya ◽

Gaurav Raj

Keyword(s):

Plasma Channel ◽

Laser Pulses ◽

Coupling Effects ◽

Channel Coupling ◽

Self Focusing ◽

Short Laser Pulses

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Comment on “Self-focusing and channel-coupling effects on short laser pulses propagating in a plasma channel” [Phys. Plasmas 11, 3259 (2004)]

Physics of Plasmas ◽

10.1063/1.2042207 ◽

2005 ◽

Vol 12 (9) ◽

pp. 094702 ◽

Cited By ~ 3

Author(s):

Mingwei Liu ◽

Hong Guo ◽

Liqiang Tang ◽

Yougen Yi ◽

Bingju Zhou

Keyword(s):

Plasma Channel ◽

Laser Pulses ◽

Coupling Effects ◽

Channel Coupling ◽

Self Focusing ◽

Short Laser Pulses

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UN-CHIRPED SHORT LASER PULSES AMPLIFICATION AND COMPRESSION IN A COMPACT EDFA BASED ON A 3 WT.% ER-DOPED COMPOSITE FIBER

Proceedings of the IX International Conference ”Science and Society - Methods and Problems of Practical Application" ◽

10.29013/ix-conf-canada-9-22-28 ◽

2020 ◽

Author(s):

B. I. Galagan ◽

I. V. Zhluktova ◽

V. A. Kamynin ◽

A. A. Ponosova ◽

S. E. Sverchkov ◽

...

Keyword(s):

Laser Pulses ◽

Composite Fiber ◽

Short Laser Pulses ◽

Er Doped

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Production of ion beams in high-power laser–plasma interactions and their applications

Laser and Particle Beams ◽

10.1017/s0263034604221048 ◽

2004 ◽

Vol 22 (1) ◽

pp. 19-24 ◽

Cited By ~ 21

Author(s):

F. PEGORARO ◽

S. ATZENI ◽

M. BORGHESI ◽

S. BULANOV ◽

T. ESIRKEPOV ◽

...

Keyword(s):

Laser Pulse ◽

Medical Physics ◽

Ion Beam ◽

Laser Pulses ◽

Ion Beams ◽

Laser Plasma Interactions ◽

Physical Mechanisms ◽

Short Laser Pulses ◽

Laser Pulse Intensity ◽

Target Design

Energetic ion beams are produced during the interaction of ultrahigh-intensity, short laser pulses with plasmas. These laser-produced ion beams have important applications ranging from the fast ignition of thermonuclear targets to proton imaging, deep proton lithography, medical physics, and injectors for conventional accelerators. Although the basic physical mechanisms of ion beam generation in the plasma produced by the laser pulse interaction with the target are common to all these applications, each application requires a specific optimization of the ion beam properties, that is, an appropriate choice of the target design and of the laser pulse intensity, shape, and duration.

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