Critical repair of an ultrafast laser system for research on semiconductor materials

用于半导体材料研究的超快激光系统的关键修复

• 批准号: 439542-2013
• 负责人: Silva, Carlos
• 金额: $ 2.44万
• 依托单位: Université de Montréal
• 依托单位国家: 加拿大
• 项目类别: Research Tools and Instruments - Category 1 (<$150,000)
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=507235
• 关键词: Critical; repair; ultrafast; laser; system

In semiconductor electronics and photonics, the response of electrons to light is what underpins their function. For example, in solar cells, absorption of light produces charges that result in electrical current and thus produce electrical energy. In optical devices, light is manipulated by the active medium when it interacts strongly with electrons in the semiconductor. In our research group, we study in great detail the interactions between light and electrons in semiconductors, particularly in so-called organic semiconductors, in which molecular motifs are the building blocks of solid-state architectures instead of atoms as in traditional semiconductors. In order to study the fastest electronic processes in real time, we use very short laser pulses (as short as 10 fs, that is 10 billionth of a millionth of a second) derived from a laser system producing one such short pulse every millisecond interval. The resulting train of laser pulses then interacts with the sample of interest, and its response is then probed as a function of time following that event. For example, the intensity of light re-emitted by the sample is analyzed as a function of time. These measurements unravel a wealth of information on the basic optical properties of the material, which is essential to underpin their function in a plethora of applications in optoelectronics and photonics.

在半导体电子和光子学中，电子对光的响应是基于其功能的基础。例如，在太阳能电池中，光的吸收会产生导致电流并因此产生电能的电荷。在光学设备中，当光线与半导体中的电子强烈相互作用时，光线会操纵光。在我们的研究小组中，我们详细研究了半导体中光与电子之间的相互作用，尤其是在所谓的有机半导体中，其中分子基序是固态架构的基础，而不是像传统半导体一样而不是原子。为了实时研究最快的电子过程，我们使用非常短的激光脉冲（短达10 fs，即10亿个百万分之一的一秒钟），该激光系统源自激光系统，每毫秒间隔都会产生一个如此短的脉冲。然后，产生的激光脉冲列与感兴趣的样品相互作用，然后将其响应作为该事件后时间的函数进行探测。例如，将样品重新定位的光强度分析为时间的函数。这些测量值揭示了有关材料基本光学特性的大量信息，这对于在光电和光子学中的大量应用中的功能支撑着它们至关重要。