Fine Structure of 2p‐Excitons in KI Single Crystals by Two‐Photon Spectroscopy | Zendy

Hasuo M. | Zendy; Nagasawa N. | Zendy

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Fine Structure of 2p‐Excitons in KI Single Crystals by Two‐Photon Spectroscopy

Author(s) -

Hasuo M.,

Nagasawa N.

Publication year - 1991

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.2221640117

Subject(s) - exciton , spectroscopy , phonon , excitation , atomic physics , envelope (radar) , photon , resolution (logic) , coupling (piping) , molecular physics , physics , materials science , condensed matter physics , optics , quantum mechanics , telecommunications , radar , artificial intelligence , computer science , metallurgy

The fine structure of the 2p‐exciton of KI single crystals due to envelope‐hole coupling is investigated by using high resolution two‐photon excitation spectroscopy. The energies of the split‐off 2P 1/2 , 2P 3/2 , and 2P 5/2 states are (6.1990 ± 0.0014), (6.1898 ± 0.0003), and (6.1947 ± 0.0004)eV, respectively. The relevant spherical parameter μ and the upper limit for the cubic parameter δ are evaluated to be (0.051 ± 0.022) and 0.004, respectively. The fine structure in the LO‐phonon assisted band is also observed. The LO‐phonon energy at Γ point is obtained to be (16.4 ± 0.4) meV.

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