Electron–phonon interactions in CsCdBr3:Yb3+CsCdBr3:Yb3+
dc.contributor.author | Hehlen, Markus P. | en_US |
dc.contributor.author | Kuditcher, Amos | en_US |
dc.contributor.author | Rand, Stephen C. | en_US |
dc.contributor.author | Tischler, Michael A. | en_US |
dc.date.accessioned | 2010-05-06T21:56:55Z | |
dc.date.available | 2010-05-06T21:56:55Z | |
dc.date.issued | 1997-10-01 | en_US |
dc.identifier.citation | Hehlen, Markus P.; Kuditcher, Amos; Rand, Stephen C.; Tischler, Michael A. (1997). "Electron–phonon interactions in CsCdBr3:Yb3+CsCdBr3:Yb3+." The Journal of Chemical Physics 107(13): 4886-4892. <http://hdl.handle.net/2027.42/70302> | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/70302 | |
dc.description.abstract | Pronounced electron–phonon coupling is observed for the 2F7/2↔2F5/22F7/2↔2F5/2 4f4f transitions of Yb3+Yb3+ doped into CsCdBr3.CsCdBr3. A comparison of the Raman spectrum and the luminescence excitation sideband accompanying the 2F7/2(0)→2F5/2(2′)2F7/2(0)→2F5/2(2′) crystal-field transition reveals vibrational properties of the [YbBr6][YbBr6] coordination unit that differ markedly from those of the CsCdBr3CsCdBr3 host. In particular, the vibronic transition associated with the totally symmetric [YbBr6][YbBr6] stretching mode appears as a very weak feature at 191 cm−1191cm−1 in the Raman spectrum, whereas the totally symmetric [CdBr6][CdBr6] stretching mode of the CsCdBr3CsCdBr3 bulk, which appears as a strong feature at 162.5 cm−1162.5cm−1 in the Raman spectrum, is only weakly discernible in the sideband. This is direct evidence for a large contribution from [YbBr6][YbBr6] local modes and a small contribution from bulk modes to the vibronic intensity. The intensity of the local mode is enhanced by approximately a factor of 2 in the Raman spectrum when the laser is tuned into resonance with the 2F7/2(0)→2F5/2(2′)2F7/2(0)→2F5/2(2′) absorption of Yb3+,Yb3+, providing direct confirmation of its assignment. The observation of the first and second members of a Franck–Condon progression for both the local and the bulk totally symmetric modes indicates that a Δ process, rather than an MM process, induces the vibronic intensity. Huang–Rhys factors of Slocal = 0.010±0.002Slocal=0.010±0.002 and Sbulk = 0.15±0.03Sbulk=0.15±0.03 were determined from the data, and reflect quite different electron–phonon coupling strengths. These results suggest that multiphonon relaxation of excited electronic states proceeds by the excitation of local modes of [YbBr6][YbBr6] followed by energy transfer to bulk modes of the lattice, possibly through a nonlinear coupling mechanism which is discussed briefly. © 1997 American Institute of Physics. | en_US |
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dc.format.extent | 165875 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.publisher | The American Institute of Physics | en_US |
dc.rights | © The American Institute of Physics | en_US |
dc.title | Electron–phonon interactions in CsCdBr3:Yb3+CsCdBr3:Yb3+ | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Optical Sciences, The University of Michigan, Ann Arbor, Michigan 48109-2122 | en_US |
dc.contributor.affiliationum | The Harrison M. Randall Laboratory of Physics, The University of Michigan, Ann Arbor, Michigan 48109-1120 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/70302/2/JCPSA6-107-13-4886-1.pdf | |
dc.identifier.doi | 10.1063/1.474851 | en_US |
dc.identifier.source | The Journal of Chemical Physics | en_US |
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dc.owningcollname | Physics, Department of |
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