Measurement of energy penetration depth of subpicosecond laser energy into solid density matter

A. Zigler*, P. G. Burkhalter, D. J. Nagel, M. D. Rosen, K. Boyer, G. Gibson, T. S. Luk, A. McPherson, C. K. Rhodes

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The energy penetration depth characteristic of the interaction of intense subpicosecond (∼600 fs) ultraviolet (248 nm) laser radiation with solid density material has been experimentally determined. This was accomplished by using a series of ultraviolet transmitting targets consisting of a fused silica (SiO2) substrate coated with an 80-600 nm layer of MgF2. The measurement of He-like and H-like Si and Mg lines, as a function of MgF 2 thickness, enabled the determination of the energy penetration depth. It was found that this depth falls in the range of 250-300 nm for a laser intensity of ∼3×1016 W/cm2. Based on numerical simulations, it is estimated that solid density material to a depth of ∼250 nm is heated to an electron temperature of ∼500 eV.

Original languageEnglish
Pages (from-to)534-536
Number of pages3
JournalApplied Physics Letters
Volume59
Issue number5
DOIs
StatePublished - 1991
Externally publishedYes

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