H. P. Herzig

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X. Wu Optics & Photonics Technology Laboratory, Ecole Polytechnique Fédérale de Lausanne, EPFL-STI-OPT, CH-2000 Neuchâtel, Switzerland Department of Precision Instruments, State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084, China E. Barakat elsie.barakat@epfl.ch Optics & Photonics Technology(More)
Finding the optimal structure to enhance light trapping in thin film silicon solar cells has attracted much attention in the previous decades. However, because of problems in integrating theory and experiment, there are only few comprehensive contributions that provide guidelines for the optimal design of such structures. In this work, a realistic thin film(More)
A subwavelength-scale square lattice optical nanostructure is fabricated using an interference photolithography process on the surface of a quartz microlens array. This nanostructuring of the quartz surface introduces an antireflective effect, reducing reflectivity between 10% and 30% and enhancing the transmissivity 3% in the visible spectrum. This(More)
In this work, we investigate the transmission properties of tunable resonant cavities inside photonic crystal waveguides. We present an optical and a mechanical way of perturbing the optical environment near the resonant cavity enabling tuning and modulation of the in-plane transmission. We have discussed different ways that change the transmission(More)
The paper presents an overview of techniques designed to increase data storage density by putting more than a single bit of information into a single pit. The current solution differs from previous suggestions in that we do not require an improved signal-to-noise ratio to achieve higher data storage density. Instead we use a hitherto unutilised feature of(More)
We report on the application of a silicon micromachined lamellar grating interferometer in a Fourier Transform Infrared (FTIR) spectrometer for the detection of gases in the mid-infrared (MIR) region. The FTIR spectrometer was equipped with MIR optical fibers for light coupling. Gas measurements in the MIR region were focused on specific gases (CO2, CH4) in(More)
Scanning near-field optical microscopy (SNOM) is a popular tool to overcome the diffraction limit for the investigation of subwavelength-scale optical structures. For nearly 30 years, various configurations have been implemented to characterize the interactions of the electromagnetic field with nanostructures in the near field. An accurate understanding of(More)
The dielectric multilayer is specially tailored to support BSWs with properties unattainable using conventional materials. In particular, the low-loss characteristic of dielectric material enables the propagation of BSWs over large distances and enables large resonance strengths. These properties are highly desirable for a 2D optics platform. Elements such(More)