Is the ultra-fast transformation of bismuth non-thermal?

E. G. Gamaly; A. V. Rode

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arXiv · 0910.2150

Is the ultra-fast transformation of bismuth non-thermal?

E. G. Gamaly·A. V. Rode

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Abstract

Transient state of femtosecond laser excited bismuth has been studied by various groups with time-resolved optical, x-ray, and electron probes at the deposited energy density from below through up to several times the equilibrium enthalpy of melting. However, the interpretations of the experimental results are controversial: the optical probes reveal the absence of transition to the melting phase while the authors of x-ray and electron diffraction experiments claim the observation of ultrafast non-thermal melting. The presented analysis, based on temperature dependence of bismuth optical properties, unequivocally shows a purely thermal nature of all the observed fs-laser induced transformations in bismuth.

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E. G. Gamaly, A. V. Rode. 2009-10-12. Is the ultra-fast transformation of bismuth non-thermal?. https://arxiv.org/abs/0910.2150

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