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Laser-material interaction of powerf...

Komashko, Aleksey Mikhaylovich.

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Laser-material interaction of powerful ultrashort laser pulses.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Laser-material interaction of powerful ultrashort laser pulses./
作者:	Komashko, Aleksey Mikhaylovich.
面頁冊數:	228 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1310.
Contained By:	Dissertation Abstracts International64-03B.
標題:	Physics, Fluid and Plasma. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3082554

Laser-material interaction of powerful ultrashort laser pulses.
Komashko, Aleksey Mikhaylovich.

Laser-material interaction of powerful ultrashort laser pulses. - 228 p.

Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1310.

Thesis (Ph.D.)--University of California, Davis, 2003.

Laser-material interaction of powerful (up to a terawatt) ultrashort (several picoseconds or shorter) laser pulses and laser-induced effects were investigated theoretically in this dissertation. Since the ultrashort laser pulse (USLP) duration time is much smaller than the characteristic time of the hydrodynamic expansion and thermal diffusion, the interaction occurs at a solid-like material density with most of the light energy absorbed in a thin surface layer. Powerful USLP creates hot, high-pressure plasma, which is quickly ejected without significant energy diffusion into the bulk of the material. Thus collateral damage is reduced. These and other features make USLLs attractive for a variety of applications. The purpose of this dissertation was development of the physical models and numerical tools for improvement of our understanding of the process and as an aid in optimization of the USLP applications.Subjects--Topical Terms:

1018402
Physics, Fluid and Plasma.

Laser-material interaction of powerful ultrashort laser pulses.
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100 1 $a Komashko, Aleksey Mikhaylovich. $3 1944628
245 1 0 $a Laser-material interaction of powerful ultrashort laser pulses.
300 $a 228 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-03, Section: B, page: 1310.
500 $a Adviser: Richard R. Freeman.
502 $a Thesis (Ph.D.)--University of California, Davis, 2003.
520 $a Laser-material interaction of powerful (up to a terawatt) ultrashort (several picoseconds or shorter) laser pulses and laser-induced effects were investigated theoretically in this dissertation. Since the ultrashort laser pulse (USLP) duration time is much smaller than the characteristic time of the hydrodynamic expansion and thermal diffusion, the interaction occurs at a solid-like material density with most of the light energy absorbed in a thin surface layer. Powerful USLP creates hot, high-pressure plasma, which is quickly ejected without significant energy diffusion into the bulk of the material. Thus collateral damage is reduced. These and other features make USLLs attractive for a variety of applications. The purpose of this dissertation was development of the physical models and numerical tools for improvement of our understanding of the process and as an aid in optimization of the USLP applications.
520 $a The study is concentrated on two types of materials—simple metals (materials like aluminum or copper) and wide-bandgap dielectrics (fused silica, water). First, key physical phenomena of the ultrashort light interaction with metals and the models needed to describe it are presented. Then, employing one-dimensional plasma hydrodynamics code enhanced with models for laser energy deposition and material properties at low and moderate temperatures, light absorption was self-consistently simulated as a function of laser wavelength, pulse energy and length, angle of incidence and polarization.
520 $a Next, material response on time scales much longer than the pulse duration was studied using the hydrocode and analytical models. These studies include examination of evolution of the pressure pulses, effects of the shock waves, material ablation and removal and three-dimensional dynamics of the ablation plume.
520 $a Investigation of the interaction with wide-bandgap dielectrics was stimulated by the experimental studies of the USLP surface ablation of water (water is a model of biological tissue) and laser-induced pressure waves. Simulations on the basis of the nonlinear ionization equation were used to examine effects of the laser created surface plasma on light absorption, reflection and transmission. Laser pulse energy conversion efficiency into pressure waves was studied experimentally and theoretically.
590 $a School code: 0029.
650 4 $a Physics, Fluid and Plasma. $3 1018402
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773 0 $t Dissertation Abstracts International $g 64-03B.
790 1 0 $a Freeman, Richard R., $e advisor
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791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3082554