Journal
CHINESE OPTICS LETTERS
Volume 18, Issue 9, Pages -Publisher
OSA-OPTICAL SOC
DOI: 10.3788/COL202018.091403
Keywords
photochromic effect; darkening and bleaching process; trapping and detrapping; spectrum transformation
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Funding
- National Natural Science Foundation of China (NSFC) [61805206, 11804036]
- Fund of China Scholarship Council [201806995045]
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The broadband photochromic effect on undoped and rare-earth-doped lead lanthanum zirconate titanate (PLZT) ceramics was studied under the illumination of ultraviolet light at 360 nm. The photocarriers' trapping and detrapping processes of thermal disconnected traps played the vital role in both darkening and bleaching processes. The interaction between photocarrier traps and rare-earth ion energy levels was demonstrated, which influenced the photochromatic darkening performance greatly. The transformation of photoluminescence spectra in Er3+-doped PLZT ceramics also improved the physical picture of the trap's distribution of the materials. This work could be used to modulate the photoluminescence and lasing behavior.
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