Target dependent femtosecond laser plasma implantation dynamics in enabling silica for high density erbium doping.
Target dependent femtosecond laser plasma implantation dynamics in enabling silica for high density erbium doping.
复制标题
DOI：
10.1038/srep14037
复制
发表时间：
2015-09-15
影响因子：
4.6
通讯作者：
Jose G
中科院分区：
文献类型：
--
作者：
Chandrappan J;Murray M;Kakkar T;Petrik P;Agocs E;Zolnai Z;Steenson DP;Jha A;Jose G
氧化碲与硅玻璃的化学性质不同，在混合熔融制玻璃时，使相分离和结晶倾向增大。我们报道了一种通过飞秒（fs）激光产生等离子体辅助工艺将Er3+掺杂碲酸盐玻璃组合物掺入二氧化硅衬底的新技术。因此，工程材料表现出Er3+离子的光谱特性，这在纯二氧化硅中是无法实现的，这意味着它是集成光子平台的理想材料。利用高分辨率横截面透射电子显微镜（HRTEM）表征了碲酸盐修饰的二氧化硅网络中Er3+离子形成了一个定义良好的亚稳和均匀的玻璃结构。利用HRTEM、卢瑟福后向散射光谱（RBS）和激光激发技术进行的化学和结构分析证实，这种fs激光等离子体植入玻璃可以被设计成明显更高浓度的Er3+-离子，而不会聚集，并通过创纪录的高寿命密度产品0.96 × 1019 s.cm−3验证了这一点。通过不同靶玻璃对平面光学层进行表征和光致发光发射光谱，确定其厚度、折射率和光致发光特性与Er3+浓度的关系。目标玻璃中Er3+含量的增加使改性二氧化硅层的折射率和光致发光强度增强，而寿命和厚度减小。
Chemical dissimilarity of tellurium oxide with silica glass increases phase separation and crystallization tendency when mixed and melted for making a glass. We report a novel technique for incorporating an Er3+-doped tellurite glass composition into silica substrates through a femtosecond (fs) laser generated plasma assisted process. The engineered material consequently exhibits the spectroscopic properties of Er3+-ions, which are unachievable in pure silica and implies this as an ideal material for integrated photonics platforms. Formation of a well-defined metastable and homogeneous glass structure with Er3+-ions in a silica network, modified with tellurite has been characterized using high-resolution cross-sectional transmission electron microscopy (HRTEM). The chemical and structural analyses using HRTEM, Rutherford backscattering spectrometry (RBS) and laser excitation techniques, confirm that such fs-laser plasma implanted glasses may be engineered for significantly higher concentration of Er3+-ions without clustering, validated by the record high lifetime-density product 0.96 × 1019 s.cm−3. Characterization of planar optical layers and photoluminescence emission spectra were undertaken to determine their thickness, refractive indices and photoluminescence properties, as a function of Er3+ concentration via different target glasses. The increased Er3+ content in the target glass enhance the refractive index and photoluminescence intensity of the modified silica layer whilst the lifetime and thickness decrease.