Corpus ID: 115988978

Demonstration of a genetic-algorithm-optimized cavity-based waveguide crossing

  title={Demonstration of a genetic-algorithm-optimized cavity-based waveguide crossing},
  author={Pengfei Xu and Yanfeng Zhang and Zengkai Shao and Yujie Chen and Siyuan Yu},
  journal={arXiv: Applied Physics},
A compact, single-etch silicon photonics waveguide crossing based on low quality factor cavity and optimized by a genetic algorithm is demonstrated. The device has 0.1~0.3 dB insertion loss and < -35 dB crosstalk per crossing for fundamental TE mode in the 1550-1600 nm wavelength band, with a footprint of 5 x 5 {\mu}m$^2$. 
Inverse-Design-based Light Via for Multi-Layer Photonic Integration Circuit
A multi-layer light via for TE-polarized light is proposed based on inverse design. Simulation results show that the insertion loss is 0.55dB at 1550nm, and the device has an ultra-wide 1dB bandwidthExpand


Experimental demonstration of a four-port photonic crystal cross-waveguide structure
We report the design and fabrication of a four-port InP photonic crystal cavity-waveguide structure in which two crossing waveguides intersect in a cavity. Transmission measurements show that byExpand
Ultralow-loss silicon waveguide crossing using Bloch modes in index-engineered cascaded multimode-interference couplers.
The loss mechanism in three-moded multimode-interference couplers that are the building blocks of a compact and low-loss waveguide crossing structure is investigated, where lateral subwavelength nanostructures are used to reduce the insertions loss. Expand
Taper-Integrated Multimode-Interference Based Waveguide Crossing Design
We present a design technique for a compact waveguide crossing by using a 90° multimode-interference (MMI) based waveguide crossing sandwiched by four identical miniaturized tapers where the power ofExpand
Ultra-low-loss CMOS-compatible waveguide crossing arrays based on multimode Bloch waves and imaginary coupling.
Broadband waveguide crossing arrays showing ultralow loss of 0.0 4dB/crossing on average and converging to 0.033 dB/Crossing in a CMOS-compatible geometry provide a robust implementation of a key component enabling dense photonic integration. Expand
Broadband waveguide intersections with low cross talk in photonic crystal circuits.
By properly designing the defect mode, this work demonstrates through numerical simulation the establishment of such a waveguide intersection in one of the most useful PCs, which is based on a two-dimensional triangular lattice of air holes made in a dielectric material. Expand
Genetic-Algorithm-Optimized Wideband On-Chip Polarization Rotator with an Ultrasmall Footprint
With a genetic algorithm, an on-chip TEo- TMo polarization rotator with a footprint of 0.96 μm × 4.2 μm is designed and experimentally demonstrated its conversion loss and extinction ratio in the wavelength range of 1440–1580nm. Expand
High-efficiency wideband SiNx-on-SOI grating coupler with low fabrication complexity.
This Letter demonstrates an easy-to-fabricate SiNx-on-SOI transverse-electric mode grating coupler requiring only one patterning step (grating alone), and without the need for HPA and CMP. Expand
Integrated photonic power divider with arbitrary power ratios.
An ultra-compact power splitter with a QR code-like nanostructure is designed by a nonlinear fast search method and measured transmission efficiencies of all the splitters are close to 80% over 30 nm wavelength range. Expand