Yuhei Miyamoto

  • Citations Per Year
Learn More
Two types of three-dimensional (3-D) optical circuits based on waveguide films are proposed and experimentally demonstrated. Type 1 is "Stacked waveguide films with 45deg mirrors". Waveguide films with 70-mum-thick undercladding layers and 32-mum-wide cores with air cladding are fabricated by the built-in mask method using photo-definable materials. The(More)
Self-similar structures known as fractals have a potential to localize electromagnetic (EM) waves that are propagating through them. In this work 3D fractals called the Menger sponges were fabricated by using stereolithography from photosensitive epoxy resin mixed with titania-silica ceramic particles to localize EM waves in X band frequency range. The(More)
Experimental studies and finite-difference time-domain simulations of electromagnetic (EM) response of the second-stage Menger sponge dielectric structures have been performed with different types of excitation in order to gain deeper insight into the phenomenon of EM wave localization in these fractals. Analysis of simulated amplitude(More)
Three-dimensional (3-D) optical wiring is demonstrated by fabricating two types of 3-D optical circuits: "stacked waveguide films with surface-normal mirrors" and "waveguide films with vertical waveguides" using optical Z-connections and self-organized lightwave network (SOLNET)
Using the self-organized lightwave network (SOLNET) technique, we observed guided beam leakage and scattering at tapered mirrors of core end facets in optical waveguide Alms. The leakage/scattering are caused by the tunneling of guided beams into the cladding film and pattern imperfection of core edge corners. To reduce them, we proposed the two-layer(More)
Two types of passive infrared microscopes with micro/nano scale resolution are developed. One is used for surface studies of solids with near-field techniques. The other is for solution measurements with a solid immersion lens. Modulation techniques to extract net signals from background radiation are introduced in both microscope systems.
Alternating magnetic field lcation technology has been used for almost 80 years in order to establish the location and the depth of a buried pipe without digging; when AC voltage is applied to the conductive pipe at one point current flows out both ways and leaks away to the surrounding soil. The current flowing the pipe creates a magnetic field of a(More)
Quantum-dot (QD) semiconductor optical amplifiers (SOAs) offer large differential gain, good temperature stability, and low chirp due to the discrete energy states of the electrons and holes under three-dimensional quantum confinement by the QDs. And recent reports of their high saturation power, ultra-broad bandwidth, and unique nonlinear properties(More)
  • 1