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A Full 25GB/S silicon photonics platform is described in this paper, and new technological challenges that aim to improve this platform, such as multiple silicon levels, silicon nitride levels, edge coupling processing or integration of heterogeneous materials to enable tunable integrated lasers, are discussed.
A novel configuration operating at 1550 nm based on silicon-on-insulator substrate is proposed for side-lobes suppression of a dielectric optical nanoantenna. The proposed configuration consists of reflection gratings which can reflect the downward light back. By using this configuration, the side-lobe level can be improved by 12.78 dB.
A heterogeneous platform i s demonstrated by integrating lithiumniobate and chalcogenide glass waveguides on silicon with optical transition through low-loss mode-converting tapers. The method provides an efficient utilization of second- and third-order nonlinearities on t he same chip for applications like stabilized octave-spanning optical combs.
We present the Ge-on-insulator platform for photonic integrated circuits. We have successfully demonstrated Ge photodetector integrated with a-Si waveguide. Ge passive waveguides and carrier-injection modulator operating at 2 μm wavelength are also demonstrated.
This paper presents the plane wave excitation of the optical leaky waveguide antenna (OLWA) by the taper array and offset parabolic reflector to obtain high antenna gain. The taper array is composed of 12 slow tapers, and obtain high aperture efficiency. The parabolic reflector enables small size as compared with the taper array. We compare the performance of these excitation methods for the wide...
The fabrication technology of a low-propagation-loss plasmonic waveguide and the technology of the monolithical integration of a plasmonic and Si nanowire waveguides were established. It was found that both the out-of-plane confinement and the in-plane confinement are critically important in order to obtain a low propagation loss of a surface plasmon. Longdistance propagation of a surface plasmon...
Two-axis quasistatic gimbal-less microscanners were fabricated through the microassembly of a glass lid and stationary comb electrodes. The total optical scan angles were enlarged to 5.2° and 5.8° for horizontal and vertical scan axes, respectively.
PAM4 modulation is currently being implemented in high-speed wireline communication standards in order to increase bandwidth density. This paper presents a transmitter which utilizes a low-area silicon microring resonator modulator with two separate phase shifter segments to realize high-speed PAM4 modulation with an optical DAC approach. The optical DAC is designed with an optimized MSB/LSB segment...
We report a wafer-scale fabrication process to make large-area slot antenna arrays for studying spontaneous emission enhancement of 2D transition metal dichalcogenide. The experimental results show a 10-fold enhancement of photoluminescence was observed.
We report a chiral dielectric metasurface with regular 3D nanorelief patterned by focused ion beam in a 300 nm thin single-crystal silicon film on sapphire. Upon annealing, the metasurface features a high transparency along with a circular dichroism and an optical activity reaching 0.5 and 20° respectively in the visible range, possesses crystal-grade hardness, chemical inertness of glass, and thermal...
A fully suspended mid-infrared racetrack resonator is experimentally demonstrated. It has good mechanical stability and broad spectral range of transparency. The measured loaded optical Q factor is 16,440 at 2402.38 nm, with an extinction ratio of 11.83 dB.
We propose a WDM and MDM compatible 2×2 switch on a silicon chip. It is composed of mode multiplexers, 2×2 single mode optical switch elements, and mode de-multiplexers. We demonstrate a prototype which can manipulate four spatial modes with broad wavelength span.
Silicon Photonics is seen as a potentially disruptive approach to design and build very high speed transceivers for datacom applications with lower cost than traditional discrete or III-V monolithic approaches. Due to the high refractive index of silicon, very low loss optical waveguides with small radius of curvature can be fabricated in silicon, allowing easy integration of wavelength multiplexers,...
We demonstrate a back end of line compatible SiN based material with tunable refractive index enabling low optical loss, high non-linear Kerr response, low index photonic crystals, high efficiency couplers, low loss waveguides and temperature tolerant MUX for DWDM.
We propose and demonstrate a fabrication technique to realize extremely narrow dielectric slots in silicon waveguides. Using this method, we have demonstrated a silicon slot waveguide with 10 nm dielectric slot with a measured propagation loss of 13.6 dB/cm.
We demonstrate a new post-fabrication trimming technique to fine-tune the phase of integrated Mach-Zehnder Interferometers (MZIs), enabling permanent correction of typical fabrication based phase errors. Preliminary results demonstrate a phase trimming accuracy of 0.146π.
A lateral displaced microheater is demonstrated for switching across the VO2 phase transition in ultra-short hybrid VO2/Si waveguides for both TE and TM light polarizations. Simulation and experimental results are obtained showing a very good agreement with a switching electrical power of around 10mW.
We present an edge-light emitting diode based on highly doped Ge/Si μ-strips starined by a SiN top stressor. The device, manufactured in a BiCMOS pilot line, shows RT NIR electroluminescence in a spectral region extending from the C- to the U-telecom bands and beyond.
We propose an adaptive distributed-bias driving method for silicon travelling-wave Mach-Zehnder modulators and achieved ∼25% modulation efficiency enhancement at both 10 and 25 Gb/s with <3.5 Vpp, without optimizing horizontal PN-diodes. This method also suggests a new modulator scheme allowing efficiency improvement and design flexibilities.
We propose a method to optimize the optical switch by substituting some of the switch elements with crossings so that the topology can be simplified and the insertion loss can also be effective minimized. A six-port optical switch prototype is designed and fabricated on silicon.
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