Low‐Power‐Consumption, Reversible 3D Optical Storage Based on Selectively Laser‐Induced Photoluminescence Degradation in CsPbBr3 Quantum Dots Doped Glass. Issue 12 (5th August 2022)

• Record Type: Journal Article
• Authors: Sun, Shengzhi; Cheng, Zhonghui; Song, Juan; Yan, Chaoyue; Man, Tao; Dong, Guoping; Qian, Bin; Qiu, Jianrong
• Is Part Of: Advanced materials technologies. Volume 7:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-08-05
• Subjects: optical data storage -- local darkening -- perovskite quantum dots -- glass -- femtosecond laser engineering; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.202200470
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract: In recent years, inorganic lead halide perovskite quantum dots have been used in various optoelectronic fields for their excellent luminescence properties, such as narrow emission bands, ultra‐wide tunable emission wavelength, and high quantum efficiency. In this paper, different from luminescence optimization in most research, luminescence degradation of perovskite quantum dots is addressed by femtosecond laser irradiation and successfully used for three‐dimensional data storage in CsPbBr3 quantum dots doped glass. Photoluminescence (PL) degradation can be finely modulated by adjusting the laser parameters. PL degradation mechanism, investigated by optical spectroscopy and morphology characterization, is attributed to laser‐induced decomposition, recrystallization, and defection of CsPbBr3 quantum dots. Laser‐induced PL degradation and the followed PL recovery by heat treatment are repeated for several cycles, showing good reversibility. Multilayer PL degradation patterns are written into the glass and read out without crosstalk, indicating high‐reliability 3D optical storage characteristics. Amazingly, PL degradation can be induced by just a low‐energy single laser pulse with estimated subpicosecond writing time per bit, demonstrating its potential in high‐speed, low‐power consumption 3D optical storage. Abstract : Photoluminescence (PL) degradation of CsPbBr3 quantum dots in glass is addressed by femtosecond laser irradiation and successfully used for reversible three‐dimensional optical storage. PL degradation can be induced by a low‐energy single laser pulse, demonstrating its potential in high‐speed, low‐power consumption optical storage. The mechanism of PL degradation is attributed to laser‐induced decomposition, recrystallization, and defection of CsPbBr3 quantum dots.