理学院学术报告20181012
发布人:胡彬  发布时间:2018-10-12   浏览次数:14

Fluoride Crystals: Exotic materials for photonic applications

Nest-NanoscienceInsitute-CNR and Dipartimento di Fisica-Universita’ di Pisa -Italy


      报告人:Mauro Tonelli教授

      时间:20181012日下午3

      地点:核工楼1216

      Abstract:We developed high-quality single fluoride crystals by Czochralskitechnique. This activity covers different applications such as IR and visible laser, photovoltaic applications, solid state crycooler, andMetrologic application.

     The active parts of these devices are insulator hosts containing fluorine doped with trivalent rare earths to develop solid state laser in the UV, visible and near infrared wavelength region. We have investigated the spectroscopic properties and energy transfer mechanisms to tune high-efficiency IR tunable lasers (about 300 nm) in CW and pulsed operation regime. Also, we investigated LiYF4 crystal doped with Yb3+and showed for the first time the development of solid state crycooler with the possibility to rise cryogenic temperature. By the same materials we have investigatedlaser emission in the visible region by fluoride crystal doped with Pr3+ and Dy3+ and showed the potential applications for optical atomic clock. It has been showed for the first time,the yellow CW laser emission by fluoride crystals and the possibility to develop Pr3+ laser emission for Sr and Sr+ atomic clock application.

报告人简介:

Mauro Tonelli教授是比萨大学物理系“激光对于新材料的应用”研究组的组长。以激光晶体生长和应用而闻名,特别是掺杂稀土离子的碱金属卤化物晶体,氧化物和氟化物晶体。他的研究小组是意大利唯一一家乃至世界少有的几家开发用于医疗,器械及激光应用绝缘体氟化物材料,特别是用于激光冷却方面的材料。他曾参与利用处女座引力干涉光学检测系统探测引力波的工作。发表sci论文300余篇,被引10538次以上。