Wrap-around invisibility cloak An can be used to conceal an object from view by guiding light around it. Most cloaks developed so far have bulky structures that are difficult scale up for hiding large objects. To design a thin wrapped such as sheet or skin, Ni et al. designed two-dimensional metamaterial surface. Such flexible, highly reflective materials could manufactured at hide Science , this issue p. 1310

Nanophotonics, the field that merges photonics and nanotechnology, has in recent years revolutionized of optics by enabling manipulation light-matter interactions with subwavelength structures. However, despite many advances this field, design, fabrication characterization remained widely an iterative process which designer guesses a structure solves Maxwell's equations for it. In contrast, inverse problem, i.e., obtaining geometry desired electromagnetic response, remains challenging...

Abstract The ability to control light propagation in photonic integrated circuits is at the foundation of modern light-based communication. However, inherent crosstalk densely packed waveguides and lack robust coupling are a major roadblock toward ultra-high density circuits. As result, diffraction limit often considered as lower bound for ultra-dense silicon photonics Here we experimentally demonstrate an active between two closely via interaction with decoupled waveguide. This scheme...

We image the ultraslow exciton-polariton propagation in a WSe 2 nanoslab with extreme spatiotemporal resolution (50 nm, <45 fs).

Open quantum systems consisting of coupled bound and continuum states have been studied in a variety physical systems, particularly within the scope nuclear, atomic, molecular physics. In open effects decay channels are accounted for by indirect non-Hermitian couplings among quasibound states. Here we explore anti-Hermitian coupling plasmonic system spatially manipulating light on nanoscale. We show that utilizing coupling, antennas closely packed only λ/15 separations can be individually...

We introduce and theoretically demonstrate a quantum metamaterial made of dense ultracold neutral atoms loaded into an inherently defect-free artificial crystal light, immune to well-known critical challenges inevitable in conventional solid-state platforms. all-optical control, on ultrafast time scales, over the photonic topological transition isofrequency contour from open closed topology at same frequency. This atomic lattice enables dynamic manipulation decay rate branching ratio probe...

Abstract Upconversion imaging, where mid‐infrared (IR) photons are converted to visible and near‐IR via a nonlinear crystal detected on cheap high‐performance silicon detectors, is an appealing method address the limitations of thermal sensors that expensive, often require cooling, suffer from both limited spectral response spatial resolution as well poor sensitivity. However, phase matching severely limits bandwidth this technique, therefore requiring serial acquisitions in order cover...

Our visual perception of our surroundings is ultimately limited by the diffraction-limit, which stipulates that optical information smaller than roughly half illumination wavelength not retrievable. Over past decades, many breakthroughs have led to unprecedented imaging capabilities beyond with applications in biology and nanotechnology. In this context, nano-photonics has had a profound impact on field optics enabling manipulation light-matter interaction subwave-length structures [1, 2,...

Abstract Currently there are no reliable biomarkers for early detection of Alzheimer's disease (AD) at the preclinical stage. This study assessed pupil light reflex (PLR) focal red and blue stimuli in central peripheral retina 125 cognitively normal middle age subjects (45–71 years old) high risk AD due to a family history (FH+), 61 age-similar with (FH−) using Chromatic Pupilloperimetry coupled Machine Learning (ML). All had ophthalmic assessment, retinal optic nerve thickness by optical...

Extra ordinary transmission through arrays of subwavelength apertures has been investigated using near-field scanning optical microscopy. For such studies were fabricated to give maximum resonance enhancement light at the wavelength illumination that was used (532 nm). To define this a design employed allowed in one field view image investigation single dimension similar what incorporated into sub-wavelength hole array. Significant asymmetry and propagation along aperture array detected....

On-chip optical data processing and photonic quantum integrated circuits require the integration of densely packed directional couplers at nanoscale. However, inherent evanescent coupling this length scale severely limits compactness such on-chip circuits. Here, inspired by adiabatic elimination in a N-level atomic system, we report an experimental realization pair that are effectively isolated from each other despite their subwavelength packing. This approach opens way to ultradense arrays...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Pankaj K. Jha, Michael Mrejen, Jeongmin Kim, Chihhui Wu, Xiaobo Yin, Yuan Wang, Xiang Zhang; Interacting dark resonances with plasmonic meta-molecules. Appl. Phys. Lett. 15 September 2014; 105 (11): 111109. https://doi.org/10.1063/1.4896035 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends...

Our visual perception of our surroundings is ultimately limited by the diffraction limit, which stipulates that optical information smaller than roughly half illumination wavelength not retrievable. Over past decades, many breakthroughs have led to unprecedented imaging capabilities beyond diffraction-limit, with applications in biology and nanotechnology. In this context, nano-photonics has revolutionized field optics recent years enabling manipulation light-matter interaction subwavelength...

Abstract

Photoelectrochemical etching of silicon can be used to form lateral refractive index gradients for transformation optical devices. This technique allows the fabrication macroscale devices with large gradients. Patterned porous layers also lifted from substrate and transferred other materials, creating more possibilities novel

We develop a coherent hyperspectral near-field microscope using combined nano-Fourier Transform Infra-Red (FTIR) spectroscope and scattering Scanning Near-field Optical Microscope (s-SNOM) illuminated by an ultra-broadband few-cycle femtosecond source, spanning spectrum from 660 to 1050 nm. Using this spatio-spectral approach, we resolve response of single plasmonic nano-antennas over 450 nm bandwidth with spatial resolution 40 spectral 50 cm-1. In particular, identify the electric...

Recently, there has been an increasing number of studies applying machine learning techniques for the design nanostructures. Most these train a deep neural network (DNN) to approximate highly nonlinear function underlying physical mapping between spectra and At end training, DNN allows on-demand nanostructures, i.e., model can infer nanostructure geometries desired spectra. While approaches have presented new paradigm, they are limited in complexity structures proposed, often bound...

We experimentally demonstrate coherent control of the nonlinear response optical second harmonic generation in resonant nanostructures beyond weak-field regime. Contrary to common perception, we show that maximizing intensity pulse does not yield strongest power-law response. this effect emerges from temporally asymmetric photoinduced a mediated noninstantaneous interaction. develop novel theoretical approach which captures nonlinearities two photon description and give an intuitive picture...

Received 5 December 2012DOI:https://doi.org/10.1103/PhysRevLett.109.259902© 2012 American Physical Society

High-speed Silicon Photonics calls for solutions providing a small footprint, high density, and minimum crosstalk, as exemplified by the recent development of integrated optical modulators. Yet, performances such modulators are hindered intrinsic material losses, which results in low energy efficiency. Using concept Adiabatic Elimination, here, we introduce scheme allowing low-loss modulation densely packed waveguides. Our system is composed two waveguides, whose coupling mediated an...

The Fourier transform-infrared (FT-IR) spectrometer is a widely used high-resolution spectral characterization method in materials, chemicals, and more. However, the inverse relation between resolution interferometer's arm length yields tradeoff footprint. Here, we introduce novel to overcome this traditional FT-IR limit. enhanced multi-scan compact present achieves an effectively long interferogram by combining multiple short scans. Simulation experimental results demonstrate significant...

We experimentally demonstrate an efficient broadband second-harmonic generation (SHG) process with a tunable mode-locked Ti:sapphire oscillator. have achieved robust and flat conversion of more than 35 nm wavelength by designing adiabatic aperiodically poled potassium titanyl phosphate crystal. Moreover, we shown that such conversion, can shape control pulses. More specifically, assign spectral phase absolute value π-step, which allows intense pump-probe amplitude modulation the output. Such...

We theoretically and experimentally demonstrate a multifrequency excitation detection scheme in apertureless near field optical microscopy, that exceeds current state of the art sensitivity background suppression. By exciting AFM tip at its two first flexural modes, demodulating detected signal harmonics their sum, we extract with twofold improved deep sub-wavelength resolution, reaching $\lambda/230$. Furthermore, method offers rich control over experimental degrees freedom, expanding...

The growing need for accurate optical simulations is central to bridging real and virtual worlds. However, current are either slow or accuracy-limited. Here, we utilize our cloud-GPU-based architecture show beyond 100-fold run-time acceleration.

We demonstrate a method to retrieve the geometry of physically inaccessible coupled waveguide systems based solely on measured distribution optical intensity. Inspired by recent advancements in computer vision, and leveraging image-to-image translation capabilities conditional generative adversarial neural networks (cGANs), our successfully predicts arbitrary with segments varying widths. As benchmark, we show that network outperforms nearest neighbor regression from both runtime accuracy point view.