Graphene is an ideal ultrathin material for various optoelectronic devices, but poor light–graphene interaction limits its further applications particularly in the visible (Vis) to near-infrared (NIR) region. Despite tremendous efforts improve light absorption graphene, achieving highly efficient of monolayer graphene within a comparatively simple architecture still urgently needed. Here, we demonstrate interesting attribute bound state continuum (BIC) by using Si-based photonic crystal slab...

Image processing is of fundamental importance for numerous modern technologies. In recent years, due to increasing demand real-time and continuous data processing, metamaterial metasurface based all-optical computation techniques emerged as a promising alternative digital computation. Most the pioneer research focused on edge detection step image processing. Metasurfaces have been shown enable real time with low no power consumption. However, previous demonstrations were subjected several...

We proposed and showed strongly orientation-controlled Förster resonance energy transfer (FRET) to highly anisotropic CdSe nanoplatelets (NPLs). For this purpose, we developed a liquid–air interface self-assembly technique specific depositing complete monolayer of NPLs only in single desired orientation, either fully stacked (edge-up) or nonstacked (face-down), with near-unity surface coverage across large areas over 20 cm2. These NPL monolayers were employed as acceptors an working model...

Machine learning methods have found novel application areas in various disciplines as they offer low-computational cost solutions to complex problems. Recently, metasurface design has joined among these applications, and neural networks enabled significant improvements within a short period of time. However, there are still outstanding challenges that needs be overcome. Here, we propose data pre-processing approach based on the governing laws physical problem eliminate dimensional mismatch...

Exploiting polaritons in natural vdW materials has been successful achieving extreme light confinement and low-loss optical devices enabling simplified device integration. Recently, α-MoO3 reported as a semiconducting biaxial material capable of sustaining naturally orthogonal in-plane phonon polariton modes IR. In this study, we investigate the polarization-dependent characteristics cavities formed using to extend degrees freedom design IR photonic components exploiting anisotropy material....

Colloidal crystal engineering with DNA allows one to design diverse superlattices tunable lattice symmetry, composition, and spacing. Most of these structures follow the complementary contact model, maximizing hybridization on building blocks producing relatively close-packed lattices. Here, low-symmetry kagome are assembled from DNA-modified gold bipyramids that can engage only in partial surface matching. The bipyramid dimensions length be engineered for two different rhombohedral unit...

Conventional approaches on design and modeling of metasurfaces employ accurate simulation methods. However, these methods require considerable computational power time for every simulation, making them computationally expensive in the long run. To address this high cost learn compact yet expressive representations high-dimensional meta-atoms efficient optimization, deep learning (DL) based have emerged as an alternative solution numerous applications been demonstrated recent years. there are...

Metasurfaces are promising candidates to take the place of conventional optical components as they enable wavefront engineering at sub- and near-wavelength distances along both lateral vertical directions. Plasmonic metasurfaces containing sub-wavelength metallic structures constitute initial examples this concept. However, plasmonic cannot achieve satisfactory efficiencies in transmission mode due their intrinsic losses. The low transmissive motivated solutions using dielectric ones. Such...

Abstract Whispering gallery mode (WGM) resonators are shown to hold great promise achieve high‐performance lasing using colloidal semiconductor nanocrystals (NCs) in solution phase. However, the low packing density of such gain media phase results increased thresholds and poor stability these WGM lasers. To address issues, here optical quantum wells (CQWs) is proposed form high‐density close‐packed solid films constructed around a coreless fiber incorporating resulting whispering modes...

Abstract Colloidal semiconductor quantum dots (QDs) can be considered a promising material platform for solution‐processed laser diodes. However, due to some fundamental challenges, the realization of electrically pumped lasing based on QDs remains unresolved. Here, binary blend and ZnO nanocrystals is employed, which serve as nano‐sized scatterers facilitate waveguide gain in ultra‐thin films. By carefully engineering electric field these films, an infrared amplified spontaneous emission...

Colloidal semiconductor quantum wells have emerged as a promising material platform for use in solution-processable light-generation including colloidal lasers. However, application relying on their optical gain suffer from fundamental complication due to multi-excitonic nature of light amplification common II-VI nanocrystals. This undesirably increases the threshold and shortens net lifetime because fast nonradiative Auger decay. Here, we demonstrate sub-single exciton level specially...

Broadband absorbers are useful ultraviolet protection, energy harvesting, sensing, and thermal imaging. The thinner these structures are, the more device-relevant they become. However, it is difficult to synthesize ultrathin in a scalable straightforward manner. A general synthetic strategy for preparing ultrathin, broadband metasurface that do not rely on cumbersome lithographic steps reported. These materials prepared through surface-assembly of plasmonic octahedral nanoframes (NFs) into...

Nanophotonics has joined the application areas of deep neural networks (DNNs) in recent years. Various network architectures and learning approaches have been employed to design simulate nanophotonic structures devices. Design simulation reconfigurable metasurfaces is another promising area for enabled design. The tunable optical response these rely on phase transitions phase-change materials, which correspond significant changes their dielectric permittivity. Consequently, requires ability...

Plasmonic nanomaterials, particularly noble metal nanoframes (NFs), are important for applications such as catalysis, biosensing, and energy harvesting due to their ability enhance localized electric fields atomic efficiency via surface plasmon resonance (LSPR). Yet the fundamental structure-function relationships plasmonic dynamics of NFS difficult study experimentally thus far rely predominately on computational methodologies, limiting utilization. This leverages capabilities ultrafast...

Abstract Image processing is of fundamental importance for numerous modern technologies including AR/VR glasses, autonomous driving, and biometric identification. In recent years, due to increasing demand real-time, continuous data processing, metamaterial metasurface based all-optical computation techniques emerged as a promising alternative digital computation. Most the pioneer research focused on edge detection step image processing. Metasurfaces have been shown enable real time with low...

Localized surface plasmon resonance (LSPR) holds great promise for the next generation of fast nanoscale optoelectronic devices, as silicon-based electronic devices approach fundamental speed and scaling limitations. However, in order to fully exploit potential plasmonics, material systems capable actively controlling manipulating plasmonic response are essential. Here, we demonstrate active control electric field distribution a microantenna by coupling LSPRs photosynthetic protein with...

Abstract Surface plasmons polaritons (SPP) hold great promise for the next generation of fast nanoscale optoelectronic devices, as silicon-based electronic devices approach fundamental speed and scaling limitations. However, in order to fully exploit potential plasmonics, material systems capable actively controlling manipulating plasmonic response is essential. Here, we demonstrate active control electric field distribution a micro antenna by coupling SPP photosynthetic protein with...