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We design and characterize asymmetric Bragg gratings in waveguides which possess multiple reflected wavelengths. We experimentally demonstrate devices with two independent stopbands, then use finite-difference time domain software to characterize more complex grating designs.
We demonstrate four-wave mixing using a Si-based high contrast gratings (HCG) resonator directly coupled in surface-normal direction. Quality-factor of the resonator is ∼7000 and peak conversion efficiency is −19.5dB at low pump power levels.
We report on the design and experimental demonstration of high-Q Si resonators with Q ∼ 106, a fundamental figure of merit of the phase coherence of hybrid Si/III-V semiconductor lasers.
We investigate the Kerr nonlinearity in a core-shell microspherical resonator fabricated from a silicon fiber. By exploiting the ultrafast wavelength shifting, sub-picosecond modulation is demonstrated.
We present the design, fabrication and characterization of cubic (3C) silicon carbide microdisk resonators with high quality factor modes at visible and near infrared wavelengths which couple to the intrinsic luminescence in silicon carbide.
We demonstrate the automated calibration of a 5th-order silicon microring filter using an optimization algorithm. The procedure only requires a single input wavelength and was implemented on a microcontroller with simple ADC and DAC circuitry.
An all-optically controlled Fabry-Perot cavity-assisted add-drop microring resonator on a silicon chip, in which one bus waveguide is replaced by a sidewall Bragg grating Fabry-Perot cavity, is proposed and experimentally demonstrated.
A novel scheme of an optically sampled, electronically quantized wavelength-demultiplexed analog-to-digital converter is proposed. The scheme is simple, energy efficient, tolerant to optical crosstalk, and fully suitable for integration on a silicon photonic chip.
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.
In this paper, the design principles and the sensitivity analysis needed for the realization of a high numerical aperture metasurface micro-lens are presented. The metasurface micro-lens is realized defining a surface with spatially-variant dielectric resonators embedded in a dielectric bulk. The designed micro-lens achieves a numerical aperture of 0.86 at the visible wavelength of 635 nm with miniaturized...
A coupled microring grating system is theoretically and experimentally demonstrated. It can be used as a no free spectral range filter, with an extinction ratio larger than 25dB and a 3dB bandwidth of 0.8nm.
We demonstrate an integrated tunable silicon band-pass filter with low in-band ripples of 0.3 dB, a high contrast of 55 dB, and no free-spectral range. A record bandwidth tuning over 670 GHz was achieved.
We illustrate a 2×2 quantum photonic switch fabric using two-photon quantum interference in an integrated silicon microring resonator array. Our modeling demonstrates phase- or wavelength-selective routing of single photons at different output states.
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...
We report a technique for defining high aspect ratio electrostatic gaps in micromachined glassblown spherical resonators. The approach is based on intentionally allowing a physical contact between the resonator and electrode structure, hence “collapsed electrodes”, then releasing and metalizing the electrodes and resonator. We utilized 500 um SOI electrodes in the glassblowing fabrication process,...
In this paper we demonstrate design, fabrication and characterization of both amorphous silicon (a-Si) and polycrystalline silicon (poly-Si) photoconductive detectors integrated on top of passive silicon oxynitride (SiON) circuit. The devices show the best responsivity of 0.5mA/W and 0.8A/W (under broadband illumination in the UV-VIS-NIR spectral region) and dark current of less than 0.23nA and 270nA...
This paper demonstrates the feasibility of a novel fabrication approach of MEMS resonators above standard CMOS circuitry and with zero-level vacuum package. As a proof of concept a monolithical CMOS-MEMS-closed loop oscillator showing dual-clock capabilities (11.9 MHz and 24.5 MHz) is presented. These two frequencies correspond to two different resonator modes, specifically the torsional and vertical...
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...
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