High power erbium femtosecond fiber laser system with stable carrier envelope phase

本文应用的激光系统将使我们能够进一步研究固体和纳米尖金属尖端的相干电子动力学。由于激光系统实现了稳定的载流子包络相位，我们可以研究光场驱动过程。过去我们已经在800纳米的中心波长成功地做到了这一点；这里应用的系统中心波长约为1.5 um，因此光周期时间比以前长了大约两倍。这对周期内效应很有意义。除此之外，我们还想研究电子相干性在石墨烯等低维固体中能保持多久。此外，波长长了两倍，这很有趣，因为有源效应变得明显更强，我们想在尖锐金属针尖的强场物理中利用这一点。有了这个系统，我们将能够深入到固体内部和表面的强场物理领域，并希望获得全新的基本见解，这将对未来的光波电子学或佩赫兹电子学产生极大的兴趣。

The laser system applied for here should allow us to further investigate coherent electron dynamics in solids and at nanometer-sharp metal tips. Since the laser system enables a stable carrier-envelope phase, we can study light-field driven processes. We have done this successfully at a central wavelength of 800 nm in the past; the system applied for here has a central wavelength of about 1.5 um, so that the optical cycle time is about a factor of two longer than before. This is of great interest for intra-cycle effects. Among other things, we want to investigate for how long electronic coherence is preserved in low-dimensional solids such as graphene. Furthermore, the wavelength, which is longer by a factor of two, is interesting, since ponderomotive effects become significantly stronger, which we want to exploit in strong field physics at sharp metal needle tips. With this system, we will therefore be able to venture deeply into the field of strong field physics inside and and on the surface of solids and hope to gain completely new fundamental insights which will be of great interest for future light-wave electronics or petahertzelectronics.