Chinese Optics Letters, Volume. 20, Issue 10, 100010(2022)
Large bandgap oscillations in two-dimensional Dion–Jacobson phase perovskites caused by coherent longitudinal acoustic phonons [Invited]
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Fig. 2. (a) Scheme of TA experiments; (b) 2D contour plot of TA spectra; (c) ΔA spectra at selected time delays; (d) dependence of oscillation period and amplitude on film thickness; (e) dependence of oscillation period and amplitude on pump photon energy; (f) elucidating the origin of TA bandgap oscillation.
Fig. 3. (a) Scheme of front-face TR experiments; (b) 2D contour plot of TR spectra; (c) time-dependent ΔR/R at selected wavelengths; (d) dependence of oscillation period on wavelength of probe light; (e) elucidating the origin of oscillation observed in TR experiments.
Fig. 4. (a) Scheme of BTR experiments; (b) 2D contour plot of BTR spectra; (c) time-dependent ΔR/R at selected wavelengths; (d) time when the CLAP arrives at air–perovskite interfaces for films of different thicknesses; (e) elucidating the origin of oscillation, and the CLAP arrival time observed in BTR experiments.
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Fengke Sun, Boning Wu, Shengye Jin, "Large bandgap oscillations in two-dimensional Dion–Jacobson phase perovskites caused by coherent longitudinal acoustic phonons [Invited]," Chin. Opt. Lett. 20, 100010 (2022)
Paper Information
Special Issue: ULTRAFAST OPTICS: FUNDAMENTALS AND APPLICATIONS
Received: Aug. 19, 2022
Accepted: Sep. 8, 2022
Published Online: Oct. 13, 2022
The Author Email: Boning Wu (boning@dicp.ac.cn), Shengye Jin (sjin@dicp.ac.cn)
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