Resonant Brillouin Scattering of Exciton-Polaritons in β-ZnP<sub>2</sub>
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Bibliographic record
Abstract
The secondary emission spectra of β-ZnP 2 under the resonant excitation in the 1 s exciton region were investigated in detail. Several scattering lines with the Stokes shifts of less than 6 meV were found. By analyzing the experimental results using a model based on the exciton-polariton picture, we attributed the observed scattering lines to the Brillouin lines. The sound velocities of the LA and TA phonons were derived to be v LA =4.8 (±0.2)×10 5 cm/s and v TA =2.8 (±0.2)×10 5 cm/s, respectively. The resonant enhancement of the Brillouin lines was observed around the transverse exciton energy E T , which reflects high transmissivity and a small group velocity of the exciton-polaritons at E T . We also found that the Rayleigh scattering line was resonantly enhanced between the longitudinal exciton energy E L and E T due to the surface roughness, which explains the drastic reduction of the luminescence from the lower branch polaritons in intensity reported earlier. The excitation energy dependence of the Brillouin line width is also discussed.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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