In this paper we present novel light trapping designs applied to multiple junction thin film solar cells. The new incorporate one dimensional photonic crystals as band pass filters that reflect short wavelengths (400 - 867 nm) and transmit longer wavelengths(867 -1800 at the interface between two adjacent addition, nano structured diffractive gratings cut into crystal layers are incorporated redirect incoming waves hence increase optical path length of within Two based on have been realized...

The alternating direction method of multipliers (ADMM) is a popular and efficient first-order that has recently found numerous applications, the proximal ADMM an important variant it. main contributions this paper are proposition analysis class inertial ADMMs, which unify basic ideas point ADMM, for linearly constrained separable convex optimization. This methods nature because at each iteration applied to extrapolated current iterate in last movement. proposed primal-dual algorithm [A....

In this paper, we report on the development of self-collimation phenomenon in photonic crystal structures for integrated optics applications. addition, detailed numerical analysis, design procedures, fabrication and characterization techniques are included. Applications presented paper include: channelless waveguiding, orthogonal bending light, tunable beam splitter, all-optical analog-to-digital converter, reconfigurable optical switch, chemical/gas sensor a three-dimensional interconnect bus.

In this paper, we first propose a general inertial proximal point algorithm (PPA) for the mixed variational inequality (VI) problem. Based on our knowledge, without stronger assumptions, convergence rate result is not known in literature type PPAs. Under certain conditions, are able to establish global and nonasymptotic $O(1/k)$ (under measure) of proposed PPA. We then show that both linearized augmented Lagrangian method (ALM) alternating direction multipliers (ADMM) structured convex...

While deep learning in 3D domain has achieved revolutionary performance many tasks, the robustness of these models not been sufficiently studied or explored. Regarding adversarial samples, most existing works focus on manipulation local points, which may fail to invoke global geometry properties, like under linear projection that preserves Euclidean distance, i.e., isometry. In this work, we show state-of-the-art are extremely vulnerable isometry transformations. Armed with Thompson...

We present and experimentally validate self-collimation in planar photonic crystals as a new means of achieving structureless confinement light optical devices. demonstrate the ability to arbitrarily route by exploiting dispersive characteristics crystal. Propagation loss low 2.17 dB/mm is observed, proposed applications these devices are presented.

We present a new algorithm for calculation of the band structure photonic crystal slabs. This combines plane-wave expansion method with perfectly matched layers termination computational region in direction out plane. In addition, effective-medium tensor is applied to improve convergence. A general complex eigenvalue problem then obtained. Two criteria are presented distinguish guided modes from PML modes. As such, this scheme can accurately determine both above and below light cone. The...

With the rapid development of high-rise buildings in China, steel-concrete composite structure is widely used because its excellent seismic performance. So far, all that rise more than 300 m China are a structure, which designed based on Chinese codes. During construction process, two main problems encountered, as follows: (1) minimum stirrup ratio, and (2) embedded depth ratio for columns, strictly limited by To solve those problems, 26 columns were tested under low cyclic reversed loading...

In real applications, it is often that the collected multiview data contain missing views. Most existing incomplete clustering (IMVC) methods cannot fully utilize underlying information of or sufficiently explore consistent and complementary characteristics. this article, we propose a novel Low-rAnk Tensor regularized viEws Recovery (LATER) method for IMVC, which jointly reconstructs utilizes views learns multilevel graphs comprehensive similarity discovery in unified model. The are...

A novel implementation of a dispersion-based beam splitter in photonic crystal (PhC) is proposed. The consists two periodic structures: nonchannel dispersion-guiding region and splitting structure operating inside the bandgap. PhC used to route optical wave by exploiting dispersion properties lattice. An arbitrary power ratio between output beams can be achieved varying parameters structure. Within studied range structures, high was observed verified experimentally.

The size of infrared camera systems can be reduced by collecting low-resolution images in parallel with multiple narrow-aperture lenses rather than a single high-resolution image one wide-aperture lens. We describe an imaging system that uses three-by-three lenslet array optical length 2.3 mm and achieves Rayleigh criteria resolution comparable conventional single-lens 26 mm. final generated this is reconstructed from the gathered each lenslet. This accomplished using superresolution...

We consider a class of linearly constrained separable convex programming problems whose objective functions are the sum three without coupled variables. For those problems, Han and Yuan (2012) have shown that sequence generated by alternating direction method multipliers (ADMM) with blocks converges globally to their KKT points under some technical conditions. In this paper, new proof result is found conditions which much weaker than Yuan’s assumptions. Moreover, in order accelerate ADMM...

Abstract Due to the prevalence of data‐driven pricing, managers are more capable customizing prices for different people, times, and places. This raises doubts about robustness fairness those automatic pricing programs. Therefore, this paper investigates a approach where automatically triggered. For problem, we present distributionally robust optimization model with Wasserstein ambiguity set novel price constraint. Furthermore, is extended accommodate two‐period setting. To best our...

In this paper, we present methods for beam splitting in a planar photonic crystal, where the light is self-guided as dictated by selfcollimation phenomenon. We an analysis of one-to-two and one-to-three splitter self-guiding crystal lattice validate our design simulations with experimental results. Moreover, first crystal. Additionally, discuss ability to tune properties these devices initial

In this paper, we present an overview of milestone achievements in the research and development photonic crystal structures their perspective applications. We highlight challenges analysis techniques, device design, efficient coupling fabrication characterization techniques for both planar three-dimensional structures. discuss extensively progress to date overcome various aspects available modeling simulation tools as well necessary procedures produce functional devices. Hence, goal work...

We present the design and fabrication of a planar structure for coupling light from multimode feed waveguide into single-line-defect photonic-crystal waveguide. Finite-difference time-domain calculations predict efficiency greater than 90%, preliminary experimental results indicate successful through Device design, fabrication, characterization are presented.

In this letter we present a revised formulation of the plane wave method (PWM) for band structure calculation photonic crystals. comparison to conventional PWM, in allows modeling dispersive material. One application presented is calculations crystal slabs. While thin slab considered, full three-dimensional (3D) problem can be reduced two-dimensional one by using effective index method. However, obtained such frequency dependent. The PWM then applied solve problem. results algorithm have...

In this paper, we demonstrate a 2-bit optical analog-to-digital (A/D) converter. This converter consists of three cascaded splitters constructed in self-guiding photonic crystal through the perturbation uniform lattice. The A/D conversion is achieved by adjusting splitting ratios changing degree perturbation. way, output ports reach state '1' at different input power levels to generate unique states desired for an To validate design concept, first experimentally characterize relation between...

A terahertz-scale two-dimensional photonic-crystal waveguide based on a silicon-on-insulator was fabricated, and the optical transmission spectrum measured. Terahertz beam propagation characteristics were observed using thermal imaging camera, with incident light in 10.1-10.7 microm range. The measured good agreement three-dimensional finite-difference time-domain calculation.