Data enhanced iterative few-sample learning algorithm-based inverse design of 2D programmable chiral metamaterials
A data enhanced iterative few-sample (DEIFS) algorithm is proposed to achieve the accurate and efficient inverse design of multi-shaped 2D chiral metamaterials. Specifically, three categories of 2D diffractive chiral structures with different geometrical …
Herpin equivalence in temporal metamaterials
In analogy with spatial multilayers, we put forward the idea of Herpin equivalence in temporal metamaterials characterized by step-like time variations of the constitutive parameters. We show that, at a given frequency, an arbitrary temporal multistep …
Coupled surface plasmon–phonon polariton nanocavity arrays for enhanced mid-infrared absorption
Resonant optical cavities are essential components in mid-infrared applications. However, typical film-type cavities require multilayer stacks with a micron-thick spacer due to mid-infrared wavelengths, and their performance is limited by narrow frequency …
Superheterodyne-inspired waveguide-integrated metasurfaces for flexible free-space light manipulation
Metasurfaces have attracted significant attention in recent years due to their unprecedented light-manipulation abilities. However, most metasurfaces so far have relied on external light excitation, prohibiting them from full on-chip integration. Inspired by …
Inverse design of perimeter-controlled InAs-assisted metasurface for two-dimensional dynamic beam steering
The current commercially viable light detection and ranging systems demand continuous, full-scene, and dynamic two-dimensional point scanning, while featuring large aperture size to ensure long distance operation. However, the biasing architecture of …
Realization of large transmitted optical Goos–Hänchen shifts in photonic crystal slabs
In this letter, we demonstrate the existence of large transmitted optical positive and negative Goos–Hänchen shifts in photonic crystal slabs numerically and experimentally. The Goos–Hänchen shift we observed directly reaches ?20 ?m, which is 30 times …
All-dielectric metasurfaces with high Q-factor Fano resonances enabling multi-scenario sensing
We propose and numerically demonstrate high Q-factor sensors based on all-dielectric metasurfaces, which are very sensitive to the change of the refractive index of the surrounding media and the incident angle. By using the light incident angular scanning …
Digitized subwavelength surface structure on silicon platform for wavelength-/polarization-/charge-diverse optical vortex generation
Optical vortices carrying orbital angular momentum (OAM) have recently attracted increasing interest for providing an additional degree of freedom for capacity scaling in optical communications. The optical vortex generator is an essential component to …
Exhaustive characterization of modified Si vacancies in 4H-SiC
The negatively charged silicon vacancy V S i ? $left({mathrm{V}}_{mathrm{S}mathrm{i}}^{-}right)$ in silicon carbide is a well-studied point defect for quantum applications. At the same time, a closer inspection of ensemble photoluminescence and electron …
Experimental demonstration of inverse-designed silicon integrated photonic power splitters
The on-chip optical power splitter is a common and important device in photonic integrated circuits (PICs). To achieve a low insertion loss and high uniformity while splitting the guided light, multi-mode interferometer-based structures utilizing a …
Nanophotonic-assisted precision enhancement of weak measurement using spin Hall effect of light
The spin Hall effect of light, i.e., the microscopic and spin-dependent transverse splitting of linearly polarized light into circular polarizations at an optical interface, has been considered as a promising candidate for high-precision measurement when …