Zhang Yongling, Lv Peng, Wang Dongxia, Qin Zhengkun, Wang Fei, Zhang Daming, Zhao Dan, Qin Guanshi, Qin Weiping
College of Information &Technology, Jilin Normal University, Siping 136000, China.
College of Electronic Science & Engineering, Jilin University, Changchun 130012, China.
Nanomaterials (Basel). 2019 Mar 20;9(3):463. doi: 10.3390/nano9030463.
In this study, we prepared cubic-phase oleic-acid-coated KMnF₃: Yb,Er nanoparticles (NPs) and NaYF₄:Yb,Er NPs, which were about 23 nm. From the down-shifting emissions spectra of the two NPs obtained by 980 nm excitation, we observed the fact that the KMnF₃: 18%Yb,1%Er NPs were a luminescent material with a broadband near-infrared emission of 1.5 μm, and full-width at half-maximum (FWHM) of 55 cm, which was wider than that of the NaYF₄: 18%Yb,1% NPs. Therefore, we believe that the oleic-acid-coated KMnF₃:Yb,Er NPs have great potential in fabricating broadband waveguide amplifiers. Through epitaxial growth of a KMnF₃: Yb active-shell on the core NPs, we compounded KMnF₃:Yb,Er@KMnF₃:Yb core-active-shell NPs whose 1.5-μm infrared emissions intensity was 3.4 times as strong as that of the core NPs. In addition, we manufactured waveguide amplifiers using KMnF₃:18%Yb,1%Er@KMnF₃:2%Yb NPs as the core materials of the waveguide amplifiers. When the input signal power was 0.2 mW and the pump power was 200 mW, we achieved a relative gain of 0.6 dB at 1534 nm in a 10-mm long waveguide.
在本研究中，我们制备了立方相油酸包覆的KMnF₃:Yb,Er纳米颗粒（NPs）和NaYF₄:Yb,Er NPs，其粒径约为23 nm。通过980 nm激发得到的两种NPs的向下转换发射光谱，我们观察到KMnF₃:18%Yb,1%Er NPs是一种发光材料，具有1.5 μm的宽带近红外发射，半高宽（FWHM）为55 cm，比NaYF₄:18%Yb,1% NPs的半高宽更宽。因此，我们认为油酸包覆的KMnF₃:Yb,Er NPs在制造宽带波导放大器方面具有巨大潜力。通过在核心NPs上外延生长KMnF₃:Yb活性壳层，我们复合了KMnF₃:Yb,Er@KMnF₃:Yb核-活性壳层NPs，其1.5-μm红外发射强度是核心NPs的3.4倍。此外，我们使用KMnF₃:18%Yb,1%Er@KMnF₃:2%Yb NPs作为波导放大器的核心材料制造了波导放大器。当输入信号功率为0.2 mW且泵浦功率为200 mW时，我们在10-mm长的波导中于1534 nm处实现了0.6 dB的相对增益。
