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We report an optical switch based architecture for realizing optical computing. Numerical simulation has been performed to validate the architecture by adopting CMOS compatible PN depletion micro-ring resonator as the approach for optical switching.
We perform experimental characterization of switchable THz metasurfaces using variable-angle broadband THz ellipsometry. We extract frequency dependent surface susceptibility tensors and model the applied DC bias as tuning the conductivity of the active layer.
An ultrasensitive transverse magnetic mode subwavelength grating racetrack resonator with a sensitivity of 429.7nm/RIU and a detection of limit of 3.71×10-4 RIU is demonstrated experimentally.
Low-loss photonic platform that can span the entire mid-infrared spectral region is reported based on the Ge-on-GaAs wafers. Optical loss of approximately 4.2 dB/cm is measured in ridge-waveguides at 10 μm wavelength.
Microring resonator based on subwavelength grating waveguides was studied and demonstrated in biosensing experiment to show its thickness-independent high sensitivity, which breaks the limitation in conventional evanescent wave sensors.
We present an electrically modulated nonlinear metamaterial at terahertz frequencies. The device consists of a planar array of split-ring resonators (SRRs) fabricated on n-type GaAs. Increasing the incident THz field strength induces carriers in the GaAs substrate, shorting the SRR capacitive gap and modulating the MM resonance. The application of a 15V bias to the MM reduces the net field modulation...
Integrated photonic waveguides on Al2O3/SiO2 platform are proposed to cover the 220∼320nm wavelength-range, which is of paramount significance in protein and nuclei acid quantification. The proposed system requires 500× less volume of solutions compared with NanoDrop™.
We demonstrate an achromatic metalens with a constant focal length over 60 nm bandwidth (λ= 490 nm to 550 nm). We also design metalenses with reverse chromatic dispersion, opposite of a Fresnel lens.
For nonlinear analysis of microwave circuit, the conventional full-wave field-circuit coupled algorithm based on time domain volume surface integral equation (TD-VSIE) is usually employed. As a result of the existence of nonlinear equations, the Newton iteration solution is used. In this paper, Thevenin's theorem is applied to combine with field-circuit coupling algorithm based on TD-VSIE for analyzing...
We describe experimental measurements and simulations of a switchable THz metasurface device in a slab waveguide geometry. The device exhibits giant phase modulation of the TE1 mode at particular frequencies determined by the metamaterial geometry. Simulations predict that a 2π phase shift can be realized in an interaction length of only a few millimeters.
The aim of this study was to develop a task set based on personalized material for nostalgic experience, which could detect cognitive ability via a virtual experience system combined with Kinect somatosensory interactive operation applications without the user wearing any accessory input device. Fifty-nine subjects participated in the experiment. The receiver operating characteristic curve of the...
To solve the problem in huge power consumption of the data centers and cloud computing, we design an extreme optical adder architecture suitable for ultra-high bit count. n-bit full adder are full implementable on a silicon platform using guided wave optics.
Mid infrared silicon photonic integrated components, namely grating couplers, strip and slot waveguides, slotted and un-slotted photonic crystal waveguides, photonic crystal microcavities are experimentally demonstrated in silicon-on-sapphire. Application in trace gas sensing is experimentally demonstrated. Progress towards monolithic integration of lasers and detectors are discussed.
Integrated photonic waveguides on Al2O3/SiO2 platform are proposed to cover the 220∼320nm wavelength-range, which is of paramount significance in protein and nuclei acid quantification. The proposed system requires 500x less volume of solutions compared to conventional NanoDrop™.
Localization and mobility monitoring are fundamental functions for constructing a smart living space. This paper presents a smart living platform based on motion sensing carpets. It is developed in the form of 50×50cm ‘puzzle floor mat’ units, which allows the users to assemble by themselves according to their desired shape and area. From the pressure data collected by motion sensing carpets, functions...
A new link scheduling approach for millimeter wave wireless mesh network is presented. The proposed link scheduling solution is designed to work together with a multiple overlapping spanning trees-based routing schemes on a mesh network topology. The link schedule computation will minimize the end-to-end delay along a subset of shortest-hop paths from non-gateway nodes to a gateway node of the mesh,...
The use of a thick Copper layer on top of an AlCu-metallization stack instead of a common thick Aluminium layer triggers the need for a change in the reliability characterization, the test structure layouts and reliability test methods. The failure and degradation mechanisms of thick Copper and Aluminium are partly different for the material as well as for thick and thin metal layers. Electromigration...
We report the design, simulation and experimental demonstration of low loss subwavelength grating waveguide (SWG) bends. With trapezoidal shape silicon pillars, the average insertion loss of a 5μm SWG waveguide bend is reduced drastically from 5.43 dB to 1.10 dB per 90° bend for quasi-TE polarization.
We demonstrate compact and highly efficient off-axis meta-lenses in the telecom region. Focusing at large angles, as high as 80°, while having a diffraction-limited focus spot enables resolving wavelength differences down to 200 picometers.
We report for the first time chiral imaging using a single planar meta-lens. Using only this meta-lens and a camera, chiroptical properties of a biological specimen is mapped across the visible spectrum.
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