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

应用在这里的激光系统应该允许我们进一步研究固体和纳米尖端的相干电子动力学。由于激光系统能够实现稳定的载波包络相位，所以我们可以研究光场驱动的过程。我们过去已经在中心波长800 nm处成功地实现了这一点；这里应用的系统的中心波长约为1.5微米，因此光周期时间大约是以前的两倍。这是对周期内效应的极大兴趣。在其他方面，我们想要研究电子相干性在石墨烯等低维固体中保持多久。此外，波长长了两倍，这是很有趣的，因为有质动力效应变得明显更强，我们想在尖锐的金属针尖的强场物理中利用这一点。因此，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拍子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.