Microaxicons for ultrashort wave packets II - MAXWELL II

在Maxwell项目的第二阶段，将与IMTEK密切合作，开发和研究用于整形和表征无衍射超短脉冲激光辐射的新型低色散MEMS致动器。在目前最成功的方法的基础上，打算对这些组件的参数字段进行必要的扩展。计划中的MBI工作包侧重于对所产生的波包在几周制度和重要应用中的传播进行时空分析。特别是，将对那些在设计和功能上直接对应于执行器的特定新特性的应用进行系统的基础研究。本质上，这包括使用快速(千赫兹范围内)可定向的压电致动器的实验，特别是(I)使用衍射菲涅耳镜的同时时空聚焦(SSTF)，(Ii)使用菲涅耳镜的相移自相关，(Iii)使用可单独寻址的轴棱镜的自适应2D脉冲宽度和波前测量，以及使用缓慢(第二尺度)热可调致动器的实验，如(Iv)用小型螺旋相板阵列形成脉冲涡旋光束图，以及(Vi)产生超短脉冲艾里光束和具有不对称MEMS镜面的相关类型的波。这一里程碑包括技术和应用基础研究的重要步骤，以及关于工作计划最重要专题的联合出版物。MBI的所有调查都必须与IMTEK所需的技术步骤同步进行。

In the second phase of the project MAXWELL (Microaxicons for ultrashort wavepackets), novel types of low-dispersion MEMS actuators for shaping and characterizing nondiffracting ultrashort-pulsed laser radiation will be developed and studied in close collaboration with IMTEK. On the basis of the currently most successful approaches, an essential extension of the parameter field of such components is intended. The planned working packages of the MBI are focused onto the spatio-temporal analysis of the propagation of the generated wavepackets in few-cycle regime and important applications. In particular, systematic fundamental research will be performed on those applications which directly correspond to the specific mew properties of the actuators in design and functionality. In essential, this comprises experiments with fast (in kilohertz range) steerable piezo-actuators, in particular (i) simultaneous space-time-focusing (SSTF) with diffrative Fresnel mirrors, (ii) phase-shift autocorrelation with Fresnel mirrors, (iii) adaptive 2D-pulse duration and wavefront measurements with individually addressable axicons, as well as experiments with slowly (on second scale) thermally tunable actuators like (iv) the shaping of pulsed vortex beam maps with arrays of miniaturized spiral phase plates, and (vi) the generation of ultrashort-pulsed Airy-beams and related types of wavepackets with asymmetric MEMS-mirrors. The milestone cover significant steps of the technological and applied fundamental research as well as joint publications concerning the most important topics of the working plan. All investigations at MBI have to be performed in synchronization with the required technological steps at IMTEK.