Multiphoton-induced two-dimensional microstructures in dye-doped bulk materials by four-beam interference of femtosecond pulses

Two-dimensional microstructures of square lattices with a period of 6.4 μm have been induced in dye-doped inorganic-organic hybrid materials by four-beam interference of femtosecond pulses. The formation of the microstructures is due to the multiphoton-induced photodecomposition of the dye molecules. The method may find applications in functional optoelectronic devices.