Two-dimensional (2D) materials have emerged as promising candidates for next-generation integrated single-photon emitters (SPEs). However, significant variability in the emission energies presents a major challenge producing identical single photons from different 2D SPEs, which may become crucial practical quantum applications. Although various approaches to dynamically tuning of SPEs been developed address issue, solution matching multiple individual is still scarce. In this work, we...

Three-dimensional (3D) printing is ideal for the fabrication of various customized 3D components with fine details and material-design complexities. However, most fabricated so far have been static structures fixed shapes functions. Here we introduce bistability to realize highly-controlled, reconfigurable structures. Particularly, demonstrate twisting rotational bistable To this end, introduced special joints construct without post-assembly. Bistability produces a well-defined energy...

Abstract Although numerous natural materials exhibit chiral optical phenomena, they are typically very weak. Chiral nanophotonic structures can significantly enhance the chiroptical responses and provide unprecedented design flexibility. However, achieving extreme chirality that approaches ultimate theoretical limit remains challenging. Here, quasibound states in continuum realized visible range, maximally emission from a perovskite metasurface is demonstrated. A film spin‐coated on...

Chiral light sources realized in ultracompact device platforms are highly desirable for various applications. Among active media used thin-film emission devices, lead-halide perovskites have been extensively studied photoluminescence due to their exceptional properties. However, up date, there no demonstrations of chiral electroluminescence with a substantial degree circular polarization (DCP) based on perovskite materials, being critical the development practical devices. Here, we propose...

Momentum space topology can be exploited to manipulate radiation in real space. Here we demonstrate topological control of 2D perovskite emission the strong coupling regime via polaritonic bound states continuum (BICs). Topological polarization singularities (polarization vortices and circularly polarized eigenstates) are observed at room temperature by measuring Stokes parameters photoluminescence momentum Particularly, symmetry-broken structures, a very large degree circular (DCP) ∼0.835...

Organic-inorganic hybrid perovskites hold great potential for various optoelectronic devices with exceptional properties. Although the direct generation of circularly polarized emission from would enable compact devices, achieving a large degree circular polarization (DCP) at room temperature still remains challenging. Herein, we demonstrate that DCP can be strongly enhanced narrow mode position chiral Fano resonances. In our design, perovskite film is spin-coated on symmetry-broken...

Abstract Single-photon emitters (SPEs) hold the key to many quantum technologies including computing. In particular, developing a scalable array of identical SPEs can play an important role in preparing single photons – crucial resources for computation at high rate, allowing improve computational capacity. Recently, different types have been found various 2D materials. Towards realizing SPE arrays materials computation, it is required develop tunable that produce by precisely controlling...

Abstract Bound states in the continuum (BICs) or trapped modes can provide an important new avenue for strong light confinement via destructive interference. Dielectric photonic structures have been extensively studied optical BICs. However, BICs plasmonic nanostructures not explored much yet. Herein, we present a thorough experimental study of Fourier-plane spectroscopy and imaging. Optical mode dispersion metal grating covered by dielectric layer is directly measured angle-resolved white...

Strong light absorption in ultrathin films has been of great interest for both fundamental studies and device applications. Here we demonstrate analyze controllable superabsorption excitonic thin the visible region. By adjusting concentration J-aggregate dyes, control dispersion (from optically metallic to nonmetallic ones) show that this leads drastic changes optical response organic films. We find planar can have various features region, example, surface polaritons, epsilon-near-pole,...

We propose and analyze a scheme for active switching spectral tuning of midinfrared Fano resonances.We consider dielectric resonators made semiconductor cylinder arrays block pairs, theoretically investigate their optical response change due to carrier generation.Owing sharp resonances in these structures large constant variations with densities, the significant is achievable.Furthermore, selective pumping coupled can even enable dynamic resonances.This leads drastic scattering spectra as...

High-index dielectric structures have recently been studied intensively for Mie resonances at optical frequencies. These can enable extreme light manipulation, similar to that which has achieved with plasmonic nanostructures. In the microwave region, resonators and metamaterials be fabricated directly using 3D printing, is advantageous fabricating structurally complicated geometries. It therefore especially suitable fabrication of subwavelength structures. Here we report theoretical...

We experimentally demonstrate perfect absorption of incident light in an ultrathin, planar organic layer, together with large photoluminescence (PL) enhancement.We find that diverse features appear the spectra J-aggregate excitonic films, depending on angle and phase controller thickness.We achieve strong even away from pole.We explain angle-dependent by comparing radiative nonradiative damping rates for different angles.Moreover, we PL enhancement at conditions.This demonstrates absorbed...

Abstract Excitons play a crucial role in the optical response of various materials. Molecular aggregates, such as J‐aggregates, exhibit strong responses via exciton generation and coherent transport. Planar J‐aggregate thin films can even show an optically metallic visible region may be considered alternative materials for plasmonics. However, direct method to control properties using top‐down approach is not reported. Here, it shown that excitonic locally modified by electron beam exposure,...

Light absorption in semiconductors is a fundamental problem that has broad impact on wide range of fields. However, it intrinsically limited by the bandgap energy semiconductor. Herein, we study enhancement sub-bandgap light inorganic-organic hybrid perovskite semiconductor films via critical coupling. This achieved at large incidence angles balancing radiative and nonradiative decay rates planar multilayer structure. We found very small loss layer can result substantial absorption. simple...

Excitonic films such as J-aggregate-doped polymer can exhibit sharp Lorentzian dispersions and thus have various optical features in the visible region.They even show an optically metallic response be considered alternative plasmonic materials.However, there were no systematic studies on interactions excitonic films.Here, we perform theoretical investigations modes planar thin films.We gradually vary dye concentration film thickness study coupling to surface bound waves (surface polariton...

Two-dimensional (2D) materials have emerged as promising candidates for next-generation integrated single-photon emitters (SPEs). However, significant variability in the emission energies of 2D SPEs presents a major challenge producing identical single photons from different SPEs, which may become crucial various quantum applications including information processing. Although approaches to dynamically tuning been developed address issue, practical solution matching multiple individual flake...

Forming single-photon emitters (SPEs) in insulating hexagonal boron nitride (hBN) has sparked wide interests the quantum photonics. Despite significant progress, it remains challenging to deterministically create SPEs at precise locations with a specific type of element for creating defects. In this study, we present straightforward approach generate site-deterministic carbon-functionalized hBN by harnessing ultrasonic nanoindentation. The obtained are high-quality and can be scaled up large...

Chiral light sources realized in ultracompact device platforms are highly desirable for various applications. Among active media employed thin-film emission devices, lead-halide perovskites have been extensively studied photoluminescence due to their exceptional properties. However, up date, there no demonstrations of chiral electroluminescence with a substantial degree circular polarization (DCP), being critical the development practical devices. Here, we propose new concept based on...