Hoinka N M, Fuhrmann-Lieker T
Macromolecular Chemistry and Molecular Materials, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, University of Kassel, Heinrich-Plett Str. 40, 34132, Kassel, Germany.
Sci Rep. 2019 Feb 12;9(1):1862. doi: 10.1038/s41598-018-38438-x.
Industrially produced copy paper is presented as a novel optical material for narrow-band stimulated emission. Fluorescent brightening agents (FBA) such as Calcofluor White provide enough gain to exceed the threshold for amplified spontaneous emission. By applying an additional dye such as Coumarin 307, or simply a highlighter pen, the emission line can be shifted from blue (~440 nm), towards turquoise (>480 nm), up to orange (590 nm) which can be useful for spectroscopic applications. These properties are demonstrated in two papers, a commercial copy paper and a FBA-stained calligraphy paper.
工业生产的复印纸被视为一种用于窄带受激发射的新型光学材料。荧光增白剂（FBA）如卡尔科弗卢尔白提供了足够的增益，以超过放大自发发射的阈值。通过添加一种额外的染料，如香豆素307，或者仅仅使用一支荧光笔，发射线可以从蓝色（约440纳米）向蓝绿色（>480纳米）移动，直至橙色（590纳米），这对于光谱应用可能是有用的。这些特性在两篇论文中得到了证明，一篇是商业复印纸，另一篇是经FBA染色的书法纸。
