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Defectivity and dimensional metrology are two main challenges in lithography due to the increasing miniaturisation of circuits. Particularly, bottom‐up alternative lithographic masks from directed self‐assembly systems have been extending the limits of critical dimensions in a cost‐effective manner although great challenges in controlling defectivity remain open. To gain insights about the percentage...
In his work we investigate the thermoelectric performance of SrTiO3 thin films doped with Nb grown using pulsed laser deposition on crystalline LaAlO3 substrates. We show that a large enhancement of the Seebeck coefficient is observed for thin films with thicknesses below 10 nm in accordance with previous publications. In addition, we investigated the thermal conductivity of the thin films using the...
Three-dimensional photonic crystals (PhCs) provide materials for the production of highly efficient light sources. In this respect, the channelling and suppression of the spontaneous emission (SE) due to the anisotropic nature of the photonic band gap (PBG), and band-edge stimulated emission, have been demonstrated. Various attempts have been reported on light emission in the telecommunication and...
In the context of Si-based photonics, we report on a strategy to integrate two optical components, a 3D photonic crystal light emitter and a waveguide, in a silicon-on-insulator patterned substrate. Self-assembled colloidal photonic crystals are produced with high crystalline quality and spatial selectivity. Plane wave expansion and finite-difference time-domain have been used to find suitable configurations...
Summary form only given: For photonic crystals (PhCs) to have successful impact on advancement of optical circuits and realisation of various functionalities, the incorporation of artificial defects into 3D PhCs is necessary. Opal films represent a convenient approach to the realisation of 3D PhCs. Taking into account the limited flexibility of the self-assembly, the first steps can be studies of...
Dielectric spheres synthesised for the fabrication of self-organized photonic crystals such as opals offer large opportunities for the design of novel nanophotonic devices. In this paper, we show a hexagonal superlattice monolayer of dielectric spheres inscribed on a 3D colloidal photonic crystal by e-beam lithography. The crystal is produced by a variation of the vertical drawing deposition method...
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