Broadband femtosecond spectroscopic ellipsometry
(2021) In Review of Scientific Instruments 92(3).- Abstract
We present a setup for time-resolved spectroscopic ellipsometry in a pump-probe scheme using femtosecond laser pulses. As a probe, the system deploys supercontinuum white light pulses that are delayed with respect to single-wavelength pump pulses. A polarizer-sample-compensator-analyzer configuration allows ellipsometric measurements by scanning the compensator azimuthal angle. The transient ellipsometric parameters are obtained from a series of reflectance-difference spectra that are measured for various pump-probe delays and polarization (compensator) settings. The setup is capable of performing time-resolved spectroscopic ellipsometry from the near-infrared through the visible to the near-ultraviolet spectral range at 1.3 eV-3.6 eV.... (More)
We present a setup for time-resolved spectroscopic ellipsometry in a pump-probe scheme using femtosecond laser pulses. As a probe, the system deploys supercontinuum white light pulses that are delayed with respect to single-wavelength pump pulses. A polarizer-sample-compensator-analyzer configuration allows ellipsometric measurements by scanning the compensator azimuthal angle. The transient ellipsometric parameters are obtained from a series of reflectance-difference spectra that are measured for various pump-probe delays and polarization (compensator) settings. The setup is capable of performing time-resolved spectroscopic ellipsometry from the near-infrared through the visible to the near-ultraviolet spectral range at 1.3 eV-3.6 eV. The temporal resolution is on the order of 100 fs within a delay range of more than 5 ns. We analyze and discuss critical aspects such as fluctuations of the probe pulses and imperfections of the polarization optics and present strategies deployed for circumventing related issues.
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- author
- Richter, Steffen LU ; Rebarz, Mateusz ; Herrfurth, Oliver ; Espinoza, Shirly ; Schmidt-Grund, Rüdiger and Andreasson, Jakob
- publishing date
- 2021-03-01
- type
- Contribution to journal
- publication status
- published
- in
- Review of Scientific Instruments
- volume
- 92
- issue
- 3
- article number
- 033104
- publisher
- American Institute of Physics (AIP)
- external identifiers
-
- scopus:85102029260
- pmid:33820054
- ISSN
- 0034-6748
- DOI
- 10.1063/5.0027219
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2021 Author(s).
- id
- 1053f99f-9e9a-4801-af8c-0d625b56abfa
- date added to LUP
- 2022-04-19 14:41:11
- date last changed
- 2025-01-13 15:48:55
@article{1053f99f-9e9a-4801-af8c-0d625b56abfa,
abstract = {{<p>We present a setup for time-resolved spectroscopic ellipsometry in a pump-probe scheme using femtosecond laser pulses. As a probe, the system deploys supercontinuum white light pulses that are delayed with respect to single-wavelength pump pulses. A polarizer-sample-compensator-analyzer configuration allows ellipsometric measurements by scanning the compensator azimuthal angle. The transient ellipsometric parameters are obtained from a series of reflectance-difference spectra that are measured for various pump-probe delays and polarization (compensator) settings. The setup is capable of performing time-resolved spectroscopic ellipsometry from the near-infrared through the visible to the near-ultraviolet spectral range at 1.3 eV-3.6 eV. The temporal resolution is on the order of 100 fs within a delay range of more than 5 ns. We analyze and discuss critical aspects such as fluctuations of the probe pulses and imperfections of the polarization optics and present strategies deployed for circumventing related issues.</p>}},
author = {{Richter, Steffen and Rebarz, Mateusz and Herrfurth, Oliver and Espinoza, Shirly and Schmidt-Grund, Rüdiger and Andreasson, Jakob}},
issn = {{0034-6748}},
language = {{eng}},
month = {{03}},
number = {{3}},
publisher = {{American Institute of Physics (AIP)}},
series = {{Review of Scientific Instruments}},
title = {{Broadband femtosecond spectroscopic ellipsometry}},
url = {{http://dx.doi.org/10.1063/5.0027219}},
doi = {{10.1063/5.0027219}},
volume = {{92}},
year = {{2021}},
}