Ultrafast imaging interferometry at femtosecond-laser-excited surfaces

Vasily V. Temnov; Klaus Sokolowski-Tinten; Ping Zhou; Dietrich von der Linde

doi:10.1364/JOSAB.23.001954

Ultrafast imaging interferometry at femtosecond-laser-excited surfaces

Vasily V. Temnov
, Klaus Sokolowski-Tinten
, Ping Zhou
, Dietrich von der Linde

University of Dortmund
University of Duisburg-Essen

Research output: Contribution to journal › Article › peer-review

Abstract

A simple and robust setup for femtosecond time-resolved imaging interferometry of surfaces is described. The apparatus is capable of measuring both very small phase shifts (∼3 × 10^-2 rad) and amplitude changes (∼1%) with micrometer spatial resolution (∼1 μm). Interferograms are processed using a 2D-Fourier transform algorithm. We discuss the image formation and the physical interpretation of the measured interferograms. The technique is applied to measure transient changes of a GaAs surface irradiated with intense femtosecond laser pulses with fluences near the ablation threshold.

Original language	English
Pages (from-to)	1954-1964
Number of pages	11
Journal	Journal of the Optical Society of America B: Optical Physics
Volume	23
Issue number	9
DOIs	https://doi.org/10.1364/JOSAB.23.001954
Publication status	Published - 1 Jan 2006
Externally published	Yes

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abstract = "A simple and robust setup for femtosecond time-resolved imaging interferometry of surfaces is described. The apparatus is capable of measuring both very small phase shifts (∼3 × 10-2 rad) and amplitude changes (∼1\%) with micrometer spatial resolution (∼1 μm). Interferograms are processed using a 2D-Fourier transform algorithm. We discuss the image formation and the physical interpretation of the measured interferograms. The technique is applied to measure transient changes of a GaAs surface irradiated with intense femtosecond laser pulses with fluences near the ablation threshold.",

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AU - Zhou, Ping

AU - von der Linde, Dietrich

PY - 2006/1/1

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N2 - A simple and robust setup for femtosecond time-resolved imaging interferometry of surfaces is described. The apparatus is capable of measuring both very small phase shifts (∼3 × 10-2 rad) and amplitude changes (∼1%) with micrometer spatial resolution (∼1 μm). Interferograms are processed using a 2D-Fourier transform algorithm. We discuss the image formation and the physical interpretation of the measured interferograms. The technique is applied to measure transient changes of a GaAs surface irradiated with intense femtosecond laser pulses with fluences near the ablation threshold.

AB - A simple and robust setup for femtosecond time-resolved imaging interferometry of surfaces is described. The apparatus is capable of measuring both very small phase shifts (∼3 × 10-2 rad) and amplitude changes (∼1%) with micrometer spatial resolution (∼1 μm). Interferograms are processed using a 2D-Fourier transform algorithm. We discuss the image formation and the physical interpretation of the measured interferograms. The technique is applied to measure transient changes of a GaAs surface irradiated with intense femtosecond laser pulses with fluences near the ablation threshold.

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Ultrafast imaging interferometry at femtosecond-laser-excited surfaces

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