Publications (3)0 Total impact
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ABSTRACT: Angle-resolved transmission of s-polarized light in triple-film hetero-opals has been investigated in the spectral range including high-order photonic band gaps, and compared to the transmission of its constituent single-film opals. The interfaces do not destroy the predominantly ballistic light propagation over the studied frequency and angular ranges, but heterostructuring leads to a smoothed angular distribution of intensity of the transmitted light and to the reconstruction of the transmission minima dispersion. The interface transmission function has been extracted by comparing the transmission of the hetero-opal and its components in order to demonstrate the difference. This deviation from the superposition principle was provisionally assigned to light refraction and reflection at the photonic crystal interfaces and to the mismatch between mode group velocities in hetero-opal components.J. Appl. Phys. 01/2008; 104(1):013527.
Article: Towards Si-based photonic circuits: Integrating photonic crystals in silicon-on-insulator platforms[show abstract] [hide abstract]
ABSTRACT: 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 for positioning emitters and waveguides. The first steps toward the realisation of these configurations are presented.Solid-State Electronics. 01/2007; 51(2):333-336.
Conference Proceeding: Towards Si-based photonic circuits: integrating photonic crystals in Si platforms[show abstract] [hide abstract]
ABSTRACT: Summary form only given: due to the exponentially increasing amount of bandwidth carried in a single fiber and the emergence of versatile The advantages of photonic crystals over classical optical materials hold the promise of ultra-compact optical component to, for example, guide light and control the spontaneous emission. Nevertheless, the challenges faced by the photonic crystal community are numerous, ranging from understanding physical phenomena, to coupling concepts between components to their integration on a technologically-relevant platform. In this talk, we will describe our approach to integration of two components on silicon platforms. These are a waveguide and a 3D photonic crystal with light emitters. The latter has successfully been deposited on a silicon platform. The integration concept, 3D photonic crystals-based emitter sample design, preparation and characterisation, as well as integration tests will be described and discussed. A preliminary model of the relevant features in the reflectance spectrum will be introduced to describe optical properties of the integrated emitter, when it includes deterministic both light emitting particles and defects.Transparent Optical Networks, 2005, Proceedings of 2005 7th International Conference; 08/2005
Johannes Gutenberg-Universität Mainz
Mainz, Rhineland-Palatinate, Germany
- Department of Biochemistry