In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 11, No. 32 ( 2023), p. 11001-11009
Abstract:
We report the relationship between phonon dressing and spectral line shape in different phases of Eu 3+ -doped BiPO 4 nanocrystals. We depict how the pure hexagonal phase exhibited a narrow line shape in contrast to mixed phases (more hexagonal phase (HP) with less low-temperature monoclinic phase (LTMP), and less HP with more LTMP). We exhibited spectral-line-shape controllability through non-Hermitian exceptional points, phase-transition phonon dressing and thermal phonon dressing. We observed that the spectral line shape in half HP + half LTMP was approximately 7 times wider at 300 K than at 77 K. We also realized that the line shape of a nonclassical spontaneous four-wave mixing (SFWM) signal could be tuned by changing the phases, time gates, detector position, and lasers. Furthermore, we showed that thermal phonons influence the in-phase SFWM line shape but not the out-of-phase fluorescence line shape. These results imply a spectral notch filter analogy with a maximum bandwidth contrast of about 74.6%.
Type of Medium:
Online Resource
ISSN:
2050-7526
,
2050-7534
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702245-6
Permalink