High-harmonic generation (HHG) produces ultrashort pulses of extreme ultraviolet radiation (XUV), which can be used for pump–probe transient absorption spectroscopy in metal oxides, semiconductors, and dielectrics. Femtosecond transient absorption on iron and cobalt oxides identifies ligand-to-metal charge transfer as the main spectroscopic transition, rather than metal-to-metal charge transfer or d–d transitions, upon photoexcitation in the visible. In silicon, attosecond transient absorption reveals that electrons tunnel into the conduction band from the valence band under strong-field excitation, to energies as high as 6 eV above the conduction band minimum. Here, the extensions of these experiments to other semiconductors, such as germanium, and other transition metal oxides, such as vanadium dioxide, are discussed. Germanium is of particular interest because it should be possible to follow both electron and hole dynamics in a single measurement using transient XUV absorption.
Borja, Lauren J., et al. "Extreme ultraviolet transient absorption of solids from femtosecond to attosecond timescales." Journal of the Optical Society of America. Part B, Optical Physics, vol. 33, no. 7, Apr. 2016. https://doi.org/10.1364/JOSAB.33.000C57
Borja, Lauren J., Zürch, M., Pemmaraju, C. D., Schultze, Martin, Ramasesha, Krupa, Gandman, Andrey, Prell, James S., Prendergast, David, Neumark, Daniel M., & Leone, Stephen R. (2016). Extreme ultraviolet transient absorption of solids from femtosecond to attosecond timescales. Journal of the Optical Society of America. Part B, Optical Physics, 33(7). https://doi.org/10.1364/JOSAB.33.000C57
Borja, Lauren J., Zürch, M., Pemmaraju, C. D., et al., "Extreme ultraviolet transient absorption of solids from femtosecond to attosecond timescales," Journal of the Optical Society of America. Part B, Optical Physics 33, no. 7 (2016), https://doi.org/10.1364/JOSAB.33.000C57
@article{osti_1502120,
author = {Borja, Lauren J. and Zürch, M. and Pemmaraju, C. D. and Schultze, Martin and Ramasesha, Krupa and Gandman, Andrey and Prell, James S. and Prendergast, David and Neumark, Daniel M. and Leone, Stephen R.},
title = {Extreme ultraviolet transient absorption of solids from femtosecond to attosecond timescales},
annote = {High-harmonic generation (HHG) produces ultrashort pulses of extreme ultraviolet radiation (XUV), which can be used for pump–probe transient absorption spectroscopy in metal oxides, semiconductors, and dielectrics. Femtosecond transient absorption on iron and cobalt oxides identifies ligand-to-metal charge transfer as the main spectroscopic transition, rather than metal-to-metal charge transfer or d–d transitions, upon photoexcitation in the visible. In silicon, attosecond transient absorption reveals that electrons tunnel into the conduction band from the valence band under strong-field excitation, to energies as high as 6 eV above the conduction band minimum. Here, the extensions of these experiments to other semiconductors, such as germanium, and other transition metal oxides, such as vanadium dioxide, are discussed. Germanium is of particular interest because it should be possible to follow both electron and hole dynamics in a single measurement using transient XUV absorption.},
doi = {10.1364/JOSAB.33.000C57},
url = {https://www.osti.gov/biblio/1502120},
journal = {Journal of the Optical Society of America. Part B, Optical Physics},
issn = {ISSN 0740-3224},
number = {7},
volume = {33},
place = {United States},
publisher = {Optical Society of America (OSA)},
year = {2016},
month = {04}}
Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1502120
Alternate ID(s):
OSTI ID: 1249773
Report Number(s):
SAND--2019-2819J; 673424
Journal Information:
Journal of the Optical Society of America. Part B, Optical Physics, Journal Name: Journal of the Optical Society of America. Part B, Optical Physics Journal Issue: 7 Vol. 33; ISSN JOBPDE; ISSN 0740-3224