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A nanobeam photonic crystal cavity made with InGaAsP quantum well and Si waveguide is integrated on SiO2/Si substrate via transfer printing. The light emitted from the nanobeam showed coupling to waveguide. We demonstrated novel way to integrate III-V devices on Si based photonic integrated circuits.
Limiting high intensity light transmission and passing through the low in a L3-type nanocavity was proposed. This thermo-optic-effect-based power limiter realized a threshold power 19uw. The threshold as a function of detuned wavelength is given.
Gain medium is introduced into the nanodisk resonator to enable loss-negligible surface plasmon polaritons propagation in near-infrared wavelengths, which benefits the applications of switches and lasers based on SPPs in the planar optoelectronic densely integration.
We demonstrate the first waveguide-coupled metal-cavity nanoLED in a III-V photonic membrane bonded to a silicon substrate, which operates at telecommunication wavelengths. The device works under electrical injection and was characterized through a grating coupler.
A novel bottom-feed on-chip waveguide slot antenna is proposed for THz applications. The slot antenna is realized using an on-chip waveguide cavity whose top and bottom plates are realized using consists of metal-6 (M6) and metal-2 (M2) layers, respectively, and the sidewall is implemented using an array of vias from M2 to M6. Instead of the traditional feeding of microstrip/CPW on the sides, this...
Photonic crystal cavities in silicon-on-insulator platforms have been designed to achieve very high quality factors and/or far-field input/output coupling. In this paper I will review our works on the use of these cavities to realize: record-high-Q resonators by genetic optimization of the holes, and bright light emission in an electrically pumped light-emitting diode. Finally, I will discuss theoretical...
Microring resonator (MRR) based optical devices using Silicon-on-insulator (SOI) waveguides are enabling technology. Using multiple microring resonators, very wide free spectral range (FSR) can be obtained. Design and analysis of optical filter using five microring resonators, i.e., pentuple microresonator has been carried out with the help of delay line signal processing and Mason's gain formula...
In this work, the fabrication of an acoustic sound absorbing surface (i.e. liner) made of commercial Visaton™ K16 microspeakers is presented. The acoustic liner is made of a circular surface composed of a 10 cm diameter fix support with 7 embedded microspeakers covering 8.5% of th overall surface. Different electrical connections of the microspeakers using no added electronic circuit are tested and...
Silicon radiation sensors fabricated with micromachining technologies offer a number of advantages compared to their planar counterparts, making them appealing for an increasing number of applications. This paper provides an overview of the most interesting developments in this field by Fondazione Bruno Kessler in collaboration with the University of Trento.
Micro-cantilevers have rapidly developed in to a new sensor technology because of their features like small size, fast response and high sensitivity. Conventional methods for fabricating microcantilevers are centred either etching in glass and silicon or using lithography. The major problem is that the traditional method to fabricate microcantilevers are not only expensive but also time consuming...
This paper reports on a novel hybrid integration concept that enables the realization of high-quality (Q) factor, low-frequency coaxial cavity resonators with well-defined capacitive-loading and variable center frequency. It is based on a silicon-micromachined spacer that is mounted on top of a conventional CNC-machined metallic cavity to functionalize the resonator's capacitance. For the first time,...
This paper reports wafer-level batch fabrication of microfluidic resonators by employing high temperature annealing of a pre-structured silicon wafer with periodic cylindrical pits for the first time. Upon high temperature annealing of pre-structured silicon, the surface silicon atoms around cylindrical pits moved and merged into long channel-shaped cavities with closed lids which are known as silicon-on-nothing...
The field of silicon photonics is becoming more important due to the ever-increasing data rates of modern computers [1]. While silicon lends itself well to the monolithic inegration of high quality modulators, detectors, and waveguides, it remains very challenging to acheive high quality light emission for use in silicon photonics. As yet, there have been three main approaches to providing silicon...
Transient simulations for solar thermophotovoltaic (STPV) systems utilizing silicon as phase change material (PCM) and Er3Al5O12 as selective emitter with Ge cell are presented. A sensitivity analysis was carried out in order to study the effect on the efficiency of the STPV system of the PCM size, solar irradiance and location of the selective emitter with respect to the receiver cavity. The results...
Nowadays, there is a need to integrate in a single silicon chip all the components to have an integrated optoelectronic circuit. In this paper, a design and computational simulation that demonstrate that feasibility of coupling a rib type optical waveguide with a photodiode on silicon substrate is carried out. The final goal is to have an integrated silicon circuit with a light source, an optical...
We present the determination of the complex permittivity for low loss PCB material FR4 and high loss arsenic-doped silicon wafer in the GHz frequency range, based on closed-form analytical expressions employing the Bessel's functions. For convenience and economical reasons, the FR4 sample is cut from the commercial PCB as a sandwich disk of copper-dielectric-copper, while the bare silicon disk is...
Progressive cardiac diseases due to population aging lead to stimulate research and innovation. Moreover, recent development in the miniaturization of microsystem offers a tremendous opportunity for medical implantable application. This paper introduces a new technology that integrates a Micro Electro-Mechanical Systems (MEMS) accelerometer and an Application-Specific Integrated Circuit (ASIC) inside...
Uncooled FIR-bolometer image sensors are established in many applications like building inspections, cold bridge analyses and predictive maintenance. New fields of application are discovered, like automotive night vision, advanced presence detection, gesture recognition etc. but these require a lower cost, small form factor packaging of the μ-bolometer sensors. Wafer level packaging (WLP) is seen...
We present an unconventional capacitive micromachined ultrasonic transducer in which a vacuum-sealed cavity beneath a diaphragm layer is comprised of an internal beam that pivots and has a first rocking or rotational vibration mode and a second flapping mode of vibration. It is anticipated that the unique structure may find application in biologically-inspired ultrasound sensors that simultaneously...
We numerically show that octave-spanning Kerr frequency comb generation in the MIR spectral region may be obtained from planar microring resonators, by combining analytical dispersion engineering with generalized nonlinear envelope equation simulations of the temporal frequency comb dynamics.
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