Time-resolved structural dynamics of thin metal films heated with femtosecond optical pulses.
Proc Natl Acad Sci U S A
; 108(47): 18887-92, 2011 Nov 22.
Article
em En
| MEDLINE
| ID: mdl-22065752
ABSTRACT
We utilize 100 fs optical pulses to induce ultrafast disorder of 35- to 150-nm thick single Au(111) crystals and observe the subsequent structural evolution using 0.6-ps, 8.04-keV X-ray pulses. Monitoring the picosecond time-dependent modulation of the X-ray diffraction intensity, width, and shift, we have measured directly electron/phonon coupling, phonon/lattice interaction, and a histogram of the lattice disorder evolution, such as lattice breath due to a pressure wave propagating at sonic velocity, lattice melting, and recrystallization, including mosaic formation. Results of theoretical simulations agree and support the experimental data of the lattice/liquid phase transition process. These time-resolved X-ray diffraction data provide a detailed description of all the significant processes induced by ultrafast laser pulses impinging on thin metallic single crystals.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Difração de Raios X
/
Transição de Fase
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Nanoestruturas
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Ouro
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Temperatura Alta
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Lasers
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Proc Natl Acad Sci U S A
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
China