飞秒激光调控CdS量子点玻璃的发光性能

doi:10.15541/jim20250121

摘要/Abstract

摘要： CdS量子点具有量子尺寸效应,通过调控尺寸可调控其光致发光波长,在微纳光学器件制备等领域具有潜在应用价值。随着超快激光技术的发展,飞秒激光逐渐被用于光电材料的微纳制造和光学性质调控,然而,利用飞秒激光调控CdS量子点发光调谐尚未实现。本工作利用飞秒激光直写技术实现对基于玻璃基质的CdS量子点的制备及其发光性能调控,并探究其在光存储和信息加密等领域的应用。研究中,采用熔融淬火法制备了5组不同含量CdS的硼硅酸盐玻璃,并对玻璃样品进行了精细抛光,用于后续的飞秒激光加工。因飞秒激光产生的局部热积累效应,CdS量子点可直接在玻璃内部诱导析出,玻璃内部析出 CdS 量子点的形貌、微观结构尺寸和分散性通过透射电子显微表征得以分析。本研究通过系统改变激光参数调控析出量子点光斑的尺寸和形貌,实现了激光诱导加工光斑尺寸从5.33~12.33 μm范围的连续调控以及发光波长在540~610 nm范围的调谐。最后,还展示了飞秒激光直写CdS量子点在信息加密和信息存储等领域的应用。

关键词: CdS量子点, 飞秒激光, 硼硅酸盐玻璃, 激光诱导

Abstract: CdS quantum dots have a quantum size effect, and the photoluminescence wavelength can be regulated by manipulating their sizes, of which show application potentials in many fields such as the fabrication of micro-nano optical devices. With the development of ultrafast laser technology, femtosecond lasers have gradually been delved in the micro-nano manufacturing and optical property regulation of the optoelectronic materials. However, the photoluminescence modulation of CdS quantum dot enabled by the femtosecond lasers has not been achieved. This work aims at the preparation and photoluminescence modulation of CdS quantum dots based on the glass matrix by using femtosecond laser direct writing, and also exploring their applications in fields such as optical storage and information encryption. In the experiment, five groups of borosilicate glasses with different CdS contents were prepared via a melt quenching method, and the glass samples were finely polished for the subsequent femtosecond laser processing. Due to the local thermal accumulation effect generated by the femtosecond laser, CdS quantum dots can be directly written and precipitate inside the glass. The morphology, microstructure size and dispersion of CdS quantum dots precipitated inside the glass are analyzed by the transmission electron microscopy. By changing the laser parameters to regulate the size of the precipitated quantum dot spot, continuous regulation of the spot size of laser-induced processing within the range of 5.33-12.33 μm and modulation of the emission wavelength within the range of 540-610 nm were achieved. Finally, the application of femtosecond laser direct writing of CdS quantum dots in fields such as information encryption and storage was also demonstrated.

Key words: CdS quantum dots, femtosecond laser, borosilicate glass, laser induction

中图分类号:

TQ174

袁子豪, 许银生, 李昕阔, 谭德志. 飞秒激光调控CdS量子点玻璃的发光性能[J]. 无机材料学报, DOI: 10.15541/jim20250121.

YUAN Zihao, XU Yinsheng, LI Xinkuo, TAN Dezhi. Femtosecond Laser Modulation of Luminescence Properties of CdS Quantum Dot Glasses[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250121.

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