Search

Integrated Silicon photonics has played an important role in advancing the applications of quantum information and quantum science. However, due to different material properties, it is challenging to integrate all components with excellent performance based on homogeneous material. Here, by combining high nonlinearity and low losses in a heterogeneous silicon platform, we efficiently generate high-quality photon pairs through spontaneous four-wave mixing in hydrogenated amorphous silicon waveguide and route them off-chip through low loss silicon nitride waveguide. A record high coincidence- to- accidental rate value of 1632.6 ($\pm$ 260.4) is achieved in this heterogeneous design with a photon pair generation rate of 1.94 MHz. We also showcase a wide range of multi-channel photon sources with coincidence- to- accidental rate consistently at 200. Lastly, we measure heralded single-photons with a lowest $g^{(2)}_H(0)$ of 0.1085 $\pm$ 0.0014. Our results demonstrate the heterogeneous silicon platform as an ideal platform for efficient generation of photon pairs and routing them off-chip with low losses. It also paves a way for the future hybrid photonic integrated circuit by collecting distinct features from different materials., 8 pages, 5 figures, 1 table, journal paper

In this letter, we focus on designing constant-modulus waveform with discrete phases for the multi-input multi-output (MIMO) radar, where the signal-to-interference-plus-noise ratio (SINR) is maximized in the presence of both the signal-dependent clutter and the noise. Given the NP-hardness of the formulated problem, we propose to relax the original optimization as a sequence of continuous quadratic programming (QP) subproblems by use of the convex hull of the discrete feasible region, which yields approximated solutions with much lower computational costs. Finally, we assess the effectiveness of the proposed waveform design approach by numerical simulations.

BioABS, which is a light-weight, recyclable green composite made from engineered soybean hulls, is a potential replacement for the petroleum-based plastic Acrylonitrile Butadiene Styrene (ABS). The purpose of this study is to assess the financial feasibility of BioABS relative to ABS. ABS and BioABS are substitute outputs sold for the same price and the production processes are essentially the same. Thus, the differences in net returns are based on differences in variable costs. ABS consists of 25% acrylonitrile, 20% butadiene, and 55% styrene, while BioABS is made up of 6.75% acrylonitrile, 5.4% butadiene, 14.85% styrene, 63% PLA, which is made from corn, sugar beets or rice, and 10% soybean hulls. The variable cost of producing BioABS is $1896.55/t, which is 4% higher than traditional ABS. If the price of styrene increases by 12.5% or if the price of PLA falls by 5.7%, BioABS then can be produced cheaper than ABS. The Ontario Ministry of Agriculture and Food (OMAF) and Ministry of Rural Affairs (MRA) – University of Guelph Bioeconomy-industrial uses research program