Surface Plasmon Assisted Control of Hot-Electron Relaxation Time. (arXiv:1911.09235v1 [physics.optics])

Surface plasmon mediated hot carrier generation is widely utilized for the manipulation of the electron-photon interactions in many types of optoelectronic devices including solar cells, photodiodes, and optical modulators. A diversity of plasmonic systems such as nanoparticles, resonators, and waveguides have been introduced to enhance hot carrier generation; however, the impact of the propagating surface…

Infrared dielectric metamaterials from high refractive index chalcogenides. (arXiv:1911.09252v1 [physics.optics])

High-index dielectric materials are in great demand for nanophotonic devices and applications, from ultrathin optical elements to metal-free sub-diffraction light confinement and waveguiding. Here we show that chalcogenide topological insulators are particularly apt candidates for dielectric nanophotonic architectures in the infrared spectral range by reporting metamaterial resonances in chalcogenide crystals sustained well inside the mid-infrared,…

Reconstruction of solutions to a generalized Moisil-Teodorescu system in Jordan domains with rectfiable boundary. (arXiv:1911.09144v1 [math.CV])

In this paper we consider the problem of reconstructing solutions to a generalized Moisil-Teodorescu system in Jordan domains of $\mathbb{R}^{3}$ with rectifiable boundary. In order to determine conditions for existence of solutions to the problem we embed the system in an appropriate generalized quaternionic setting.

Precise Photon Correlation Measurement of a Chaotic Laser. (arXiv:1911.09258v1 [quant-ph])

The second order photon correlation g^(2)(tau) of a chaotic optical-feedback semiconductor laser is precisely measured using a Hanbury Brown-Twiss interferometer. The accurate g^(2)(tau) with non-zero delay time is obtained experimentally from the photon pair time interval distribution through a ninth-order self-convolution correction. The experimental results agree well with the theoretical analysis. The relative error of…

m-Axial and m-Circular 3m-Polygons. (arXiv:1911.09155v1 [math.CO])

The present article includes the enumeration of $n$-polygons with two certain symmetry properties: For a number $3m$ of vertices, we count the $3m$-polygons with $m$ symmetry axes and the $3m$-polygons, that match after three elementary rotations, but have no symmetry axes. For those polygons we give complete lists of representatives of their equivalence-classes and closed…

A Tale of Two-Timescale Reinforcement Learning with the Tightest Finite-Time Bound. (arXiv:1911.09157v1 [cs.LG])

Policy evaluation in reinforcement learning is often conducted using two-timescale stochastic approximation, which results in various gradient temporal difference methods such as GTD(0), GTD2, and TDC. Here, we provide convergence rate bounds for this suite of algorithms. Algorithms such as these have two iterates, $\theta_n$ and $w_n,$ which are updated using two distinct stepsize sequences,…

Semantic Segmentation of Thigh Muscle using 2.5D Deep Learning Network Trained with Limited Datasets. (arXiv:1911.09249v1 [eess.IV])

Purpose: We propose a 2.5D deep learning neural network (DLNN) to automatically classify thigh muscle into 11 classes and evaluate its classification accuracy over 2D and 3D DLNN when trained with limited datasets. Enables operator invariant quantitative assessment of the thigh muscle volume change with respect to the disease progression. Materials and methods: Retrospective datasets…

Machine Learning-enhanced Realistic Framework for Real-time Seismic Monitoring — The Winning Solution of the 2017 International Aftershock Detection Contest. (arXiv:1911.09275v1 [eess.SP])

Identifying the arrival times of seismic P-phases plays a significant role in real-time seismic monitoring, which provides critical guidance for emergency response activities. While considerable research has been conducted on this topic, efficiently capturing the arrival times of seismic P-phases hidden within intensively distributed and noisy seismic waves, such as those generated by the aftershocks…

Doubling the near-infrared photocurrent in a solar cell via omni-resonant coherent perfect absorption. (arXiv:1911.09276v1 [physics.optics])

Minimizing the material usage in thin-film solar cells can reduce manufacturing costs and enable mechanically flexible implementations, but concomitantly diminishes optical absorption. Coherent optical effects can help alleviate this inevitable drawback at discrete frequencies. For example, coherent perfect absorption guarantees that light is fully absorbed in a thin layer regardless of material or thickness but…

Distributed Iterative CT Reconstruction using Multi-Agent Consensus Equilibrium. (arXiv:1911.09278v1 [eess.IV])

Model-Based Image Reconstruction (MBIR) methods significantly enhance the quality of computed tomographic (CT) reconstructions relative to analytical techniques, but are limited by high computational cost. In this paper, we propose a multi-agent consensus equilibrium (MACE) algorithm for distributing both the computation and memory of MBIR reconstruction across a large number of parallel nodes. In MACE,…