Picosecond near-to-mid-infrared absorption of pulse-injected small polarons in magnesium doped lithium niobate
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https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-201901231039
https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-201901231039
Title: | Picosecond near-to-mid-infrared absorption of pulse-injected small polarons in magnesium doped lithium niobate |
Authors: | Freytag, Felix Booker, Phillip Corradi, Gábor Messerschmidt, Simon Krampf, Andreas Imlau, Mirco |
ORCID of the author: | https://orcid.org/0000-0001-5790-9379 https://orcid.org/0000-0001-6193-7487 |
Abstract: | 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 non-instantaneous 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) two-photon 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 electron-phonon-coupling. |
Citations: | Optical Materials Express, Volume 8, Number 6, 2018, P. 1505-1514 |
URL: | https://osnadocs.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-201901231039 |
Subject Keywords: | Optical nonlinearities; condensed matter; Spectroscopy; infrared |
Issue Date: | 15-May-2018 |
Type of publication: | Einzelbeitrag in einer wissenschaftlichen Zeitschrift [article] |
Appears in Collections: | FB06 - Hochschulschriften Open-Access-Publikationsfonds |
Files in This Item:
File | Description | Size | Format | |
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Optical_Materials_Express_8_6_2018_Freytag.pdf | 3,74 MB | Adobe PDF | Optical_Materials_Express_8_6_2018_Freytag.pdf View/Open |
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