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Originalpublikation
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
Version im Repositorium
Zum Zitieren der Version im Repositorium verwenden Sie bitte diesen DOI:
https://doi.org/10.15488/4197
| Zusammenfassung: | |
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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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| Lizenzbestimmungen: | OSA Open Access License - https://pubs.acs.org/page/policy/authorchoice_termsofuse.html |
| Publikationstyp: | article |
| Publikationsstatus: | publishedVersion |
| Erstveröffentlichung: | 2018 |
| Schlagworte (englisch): | 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 |
| Fachliche Zuordnung (DDC): | 530 | Physik |
Die Publikation erscheint in Sammlung(en):
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An-Institute
Frei zugängliche Publikationen aus An-Instituten der Leibniz Universität Hannover