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Original version
Freytag, F.; Booker, P.; Corradi, G.; Messerschmidt, S.; Krampf, A.; Imlau, M.: Picosecond near-to-mid-infrared absorption of pulse-injected small polarons in magnesium doped lithium niobate. In: Optical Materials Express 8 (2018), Nr. 6, S. 1505-1514. DOI: https://doi.org/10.1364/OME.8.001505
Repository version
To cite the version in the repository, please use this identifier:
https://doi.org/10.15488/4197
Files in this item
| Abstract: | |
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Femtosecond-pulse-induced (Epump = 2:5 eV) picosecond infrared absorption is studied in the spectral region between 0.30 eV and 1.05 eV in LiNbO3:Mg. We find a noninstantaneous mid-infrared absorption peak in the time domain up to 1 ps and a broad-band, long-lived absorption (maximum at 0.85 eV, width ≈ 0:5 eV), for t > 1 ps. The modelling succeeds by considering small Nb4+ Nb electron polaron formation along the sequence: (i) twophoton injection of hot electron-hole pairs at Nb-O-octahedra, (ii) dissociation and electron cooling by electron-phonon-scattering, and (iii) electron self-localization by strong electronphonon- coupling.
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| License of this version: | OSA Open Access License - https://www.osapublishing.org/submit/review/open-access-policy-statement.cfm |
| Publication type: | Article |
| Publishing status: | publishedVersion |
| Publication date: | 2018 |
| Keywords english: | Electromagnetic pulse, Electrons, Infrared absorption, Infrared devices, Lithium, Magnesium, Niobium compounds, Phonons, Polarons, Electron cooling, Electron hole pairs, Electron phonon couplings, Electron phonon scattering, Electron polarons, Mid infrared absorptions, Self localization, Spectral region, Light absorption |
| DDC: | 530 | Physik |
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An-Institute
Frei zugängliche Publikationen aus An-Instituten der Leibniz Universität Hannover