Excitons in monoclinic zinc diphosphide: Orthoexciton and polariton effects at n=1 resonance |
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Authors: | I S Gorban’ A P Krokhmal’ Z Z Yanchuk |
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Institution: | (1) Shevchenko National University, Vladimirskaya ul. 64, Kiev, 252033, Ukraine |
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Abstract: | Quantitative investigations of the hydrogen-like exciton B series in the absorption spectra of the β-ZnP2 crystal for various wave vector directions and polarization states of radiation are conducted. It is shown that the B spectrum constitutes a single orthoexciton series with S-type envelope functions, and low-energy components in doublet lines belong to the S-type for lines in the series with n≥3. Polariton effects are clearly manifested at the B n=1 exciton resonance, and Bouguer’s law is violated. The oscillator strength tensor components are determined for transitions to the exciton states of the B series, and the polariton parameters at the B n=1 exciton resonance are calculated. |
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