Quantum control spectroscopy (QCS) with a micro-electro-mechanical system (MEMS)

Phase modulation of ultrashort UV pulses is developed for application in Quantum Control Spectroscopy (QCS) using a MEMS based two dimensional phase only modulator. The phase modulator consists of an array of 240 by 200 individually addressable, electrostatic displaceable micromirrors, placed in the Fourier plane of a purely reflective 4f-geometry. As possible applications, the adaptive recompression of ultrashort UV-pulses and arbitrary phase modulation for nonlinear spectroscopy and control experiments are discussed. Furthermore, the 2D layout of the device offers the potential to control multi beam experiments in a much easier way than with conventional experimental methods.