Aluminum oxide and yttrium oxide thin films are known to be excellent hosts for rare-earth ions and prospective materials for active integrated optical applications . Both materials have sufficiently large refractive indices for the realization of highly compact integrated optical devices. They also have a high transparency, which is required for… (More)
—In this paper, the design, fabrication, and application of a highly tolerant polarization-independent optical-waveguide structure suited for operation in the third communication window is presented. The waveguide structure has been optimized toward minimized sensitivity to technological tolerances and low fabrication complexity. The tolerance analysis has… (More)
We combine the theoretical results of some recent publications on the beam propagation method based on the finite difference method (PDBPM) and the slowly varying envelope approximation (SVEA). The use of the SVEA leads to a considerable reduo tion of the computation time but introduces a fundamental error in the phase velocity of a given mode and also to… (More)
It is shown experimentally that in laser interference lithography, by using a reference grating, respective grating layers can be positioned with high relative accuracy. A 0.001 angular and a few nanometers lateral resolution have been demonstrated.
We report the application of an integrated optical Young interferometer sensor for ultrasensitive, real-time, direct detection of viruses. We have validated the sensor by detecting herpes simplex virus type 1 (HSV-1), but the principle is generally applicable. Detection of HSV-1 virus particles was performed by applying the virus sample onto a sensor… (More)
Since the start of the group IOMS in the mid-eighties of the last century its research had a strong focus on integrated optical (IO) sensors. A large number of different sensor device concepts, based on for example plasmonics  quenching of luminescence [1,2] and a large number of interferometric principles [3, 4] have been proposed and tested; part of… (More)
—We report the fabrication and the characterization of the refractometric and thermo-optical properties of a quasi-one-dimensional waveguide photonic crystal—a strong, 76-m-long Bragg grating. The transmission spectra (around 660 nm) of the structure have been measured as a function of both the cladding refractive index and the temperature. The transmission… (More)
In this paper we introduce Nanoscale Optofluidic Sensor Arrays (NOSAs), which are an optofluidic architecture for performing highly parallel, label free detection of biomolecular interactions in aqueous environments. The architecture is based on the use of arrays of 1D photonic crystal resonators which are evanescently coupled to a single bus waveguide.… (More)
The hydrogen in PECVD-SiOxNy was studied with IR spectroscopy and ERD analysis as function of the O/N ratio and the annealing treatment up to 1150 "C. The results were compared with measured spectral waveguide losses.
It is shown that, by adapting the refractive indexes prerequisite for the use of the FDBPM algorithm. We remark in the vicinity of interfaces, the ZD-beam propagation method based On the finite difference (FDBPM) scheme can be made much more effective. This holds especially for TM modes propagating in structures with high-index contrasts, such as surface… (More)