As nanoemitters to be introduced into our photonic structures, colloidal PbS NCs from Evident Technologies (EviDot core LNR03LPB) suspended in toluene () with a core diameter of are used. For an NC film drop cast onto a Si substrate, the room temperature PL spectrum under 532 nm continuous wave (cw) excitation is shown in Fig. 1(a) by the black dashed line. The PL signal shows a peak emission at 1375 nm and a full width at half maximum (FWHM) of , which is due to the inhomogeneous size distribution of the NCs. However, these NCs, when kept in an ambient environment, tend to bleach and oxidize quickly, which causes the PL signal to vanish or severely blue-shift, respectively.10 The incorporation of the NCs into a host material is one way to counteract these effects. From a device point of view, where the stability of the optical properties of the NCs over time is of great importance, poly(methyl-methacrylate) (PMMA), which is commonly used in research as a host material for NCs,11,12 is not suitable because a large shift on the PL peak emission can still be observed over the course of several days.13 On the other hand, novel epoxy-based photoresists like SU-8 or mr-L 6005 XP have been shown to also keep their lithographic processability after the incorporation of NCs emitting in the visible wavelength regime.14,15 A compound material suitable for device applications at telecom wavelengths should consequently ensure high stability over a long period of time while still preserving the sensitivity to lithographic patterning.