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Lo‐phonon‐assisted two‐photon absorption of the first excited state of the biexciton in CuCl
Author(s) -
Ekardt W.,
Sheboul M. I.
Publication year - 1977
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220800105
Subject(s) - excited state , phonon , biexciton , absorption (acoustics) , absorption cross section , exciton , atomic physics , two photon absorption , envelope (radar) , photon , physics , molecular physics , cross section (physics) , condensed matter physics , quantum mechanics , optics , laser , telecommunications , radar , computer science
LO‐phonon‐assisted two‐photon absorption of the first excited level of the excitonic molecule in CuCl is considered on the basis of the previously derived symmetry properties of this state. A giant cross‐section for this process is predicted mainly due to the “resonant” intermediate state Γ 1/5 of the single exciton. The process under consideration overcomes the difficulties of pure two‐photon absorption (TPA) of p‐type envelope states of the excitonic molecule as stated by Hanamura.