Time-resolved photoluminescence spectroscopy of ... and O super(-) polarons in LiNbO sub(3) single crystals

We probe here the optical relaxation properties of Mg-doped wide-band-gap LiNbO sub(3) single crystals with both a high spectral and temporal resolution at cryogenic temperatures. Surprisingly, we observe the photoluminescence to decay in a two-step process: a fast relaxation and a slower one center...

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Published in:Physical review. B 2016-05, Vol.93 (17)
Main Authors: Kampfe, T, Haussmann, A, Eng, L M, Reichenbach, P, Thiessen, A, Woike, T, Steudtner, R
Format: Article
Language:English
Subjects:
Condensed matter
Cryogenic temperature
Decay
Doping
Photoluminescence
Polarons
Radiative recombination
Single crystals
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container_title Physical review. B
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creator Kampfe, T
Haussmann, A
Eng, L M
Reichenbach, P
Thiessen, A
Woike, T
Steudtner, R
description We probe here the optical relaxation properties of Mg-doped wide-band-gap LiNbO sub(3) single crystals with both a high spectral and temporal resolution at cryogenic temperatures. Surprisingly, we observe the photoluminescence to decay in a two-step process: a fast relaxation and a slower one centered around an energy E sub(max)= 2.62 + or -0.05 eV. Both decays fit well to the stretched-exponential behavior. Moreover, we are able to associate these energies to the recombination of light-induced (ProQuest: Formulae and/or non-USASCII text omitted) and O super(-) small polarons. Also, we checked the stability of our findings by using LiNbO sub(3) single crystals that show on-purpose modified radiative recombination processes, i.e., with a Mg doping both above and below the optical damage resistance threshold, as well as with different poling histories of inverted domains.
doi_str_mv 10.1103/PhysRevB.93.174116
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Condensed matter
Cryogenic temperature
Decay
Doping
Photoluminescence
Polarons
Radiative recombination
Single crystals
title Time-resolved photoluminescence spectroscopy of ... and O super(-) polarons in LiNbO sub(3) single crystals
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