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Highly Non‐Linear Quantum Dot Doped Nanocomposites for Functional Three‐Dimensional Structures Generated by Two‐Photon Polymerization

A nanocomposite consisting of a photosensitive organic inorganic hybrid polymer functionalized with PbS quantum dots has been developed using a sol gel process. The uniformly dispersed nanocomposite exhibits ultrahigh third-order non-linearity (-3.2 x 10(-12) cm(2) W(-1)) because of the strong quantum confinement of small-sized and narrowly distributed quantum dots. The non-linear nanocomposite has been proven to be suitable for the fabrication of 3D micro/nano photonic devices using two-photon polymerization. The fabricated photonic crystals show stop gaps with more than 60% suppression in transmission at the telecommunications wavelength region.