Pichot V, Muller O, Seve A, Yvon A, Merlat L, Spitzer D
NS3E "Nanomatériaux pour Systèmes Sous Sollicitations Extrêmes" UMR 3208 ISL/CNRS/UNISTRA, French-German Research Insitute of Saint-Louis, 5 rue du général Cassagnou, 68301, Saint-Louis, France.
Radiation Interaction with Matter Laboratory, French-German Research Insitute of Saint-Louis, 5 rue du Général Cassagnou, 68301, Saint-Louis cedex, France.
Sci Rep. 2017 Oct 26;7(1):14086. doi: 10.1038/s41598-017-14553-z.
Detonation nanodiamonds exhibit strong nonlinear optical properties depending on their electronic properties. In the present paper, the nanodiamond functional groups are chemically modified to obtain nanodiamonds with primary amines on their surface. The optical properties of such nanodiamonds placed in water suspensions are studied and compared with the one of classical detonation nanodiamonds. Transmission, scattering and Z-scan experiments are performed for two different wavelengths (532 nm and 1064 nm). A lower threshold for optical limiting associated to more pronounce non-linear optical effects is detected at the wavelength of 1064 nm compared to the one at 532 nm. This effect may be due to a stronger nonlinear backscattering behavior at 1064 nm. Moreover, a striking result obtained from the Z-scan experiments reveals a completely different behavior of the functionalized nanodiamonds for both wavelengths. This result is discussed in regard to the electronic properties of the material and possible charge transfer.
爆轰纳米金刚石根据其电子性质表现出强烈的非线性光学性质。在本文中，对纳米金刚石官能团进行化学修饰，以获得表面带有伯胺的纳米金刚石。研究了置于水悬浮液中的此类纳米金刚石的光学性质，并与经典爆轰纳米金刚石的光学性质进行了比较。针对两种不同波长（532 nm和1064 nm）进行了透射、散射和Z扫描实验。与532 nm波长相比，在1064 nm波长处检测到与更明显的非线性光学效应相关的更低光学限幅阈值。这种效应可能是由于在1064 nm处更强的非线性背散射行为。此外，Z扫描实验得到的一个惊人结果表明，官能化纳米金刚石在两种波长下表现出完全不同的行为。结合材料的电子性质和可能的电荷转移对这一结果进行了讨论。
