Abstract Metamaterials and metasurfaces of artificial micro-/nano- structures functioning from microwave, terahertz, to infrared regime have enabled numerous applications bioimaging, cancer detection immunoassay on-body health monitoring systems in the past few decades. Recently, trend turning metasurface devices flexible stretchable has arisen that flexibility stretchability not only makes device more biocompatible wearable, but also provides unique control manipulation structural...

Abstract In recent years, 3D Dirac semimetals (DSM) with linear energy‐momentum dispersion near the Fermi points have emerged as promising material candidates for novel tunable metamaterial devices due to their prominent electromagnetic performance and excellent tunability. this work, propagation characteristics of DSM‐supported double triple stripe patterned absorbers (MMAs) are investigated in terahertz (THz) regime by facile modulation level. The results manifest that devices, two strong...

By utilizing the three-dimensional Dirac semimetal (DSM)-strontium titanate (SrTiO 3 , STO) elliptical hybrid metamaterials, tunable Fano resonances were systematically analyzed in THz regime, for example, effects of asymmetric degrees, DSM Fermi levels, and operation frequencies. Interestingly, an obvious peak is observed by introducing a displacement (asymmetric degree) between STO resonators. In particular, amplitude modulation depth (MD) transmission (reflection dip) 49.5% (86.65%) when...

A novel tunable terahertz hybrid plasmonic waveguide based on a 3D Dirac semimetal (DSM) elliptical fiber separated from silicon layer by dielectric gap is explored. Interestingly, the results manifest that as ratio increases, real part of effective mode index and propagation length both monotonically increase. Importantly, figure merit strikingly reaches more than 1500. The shows peak near interface between filed dissipation regions. field region significantly affected Fermi level, in...

Abstract By depositing a dielectric fiber on top of 3D Dirac semi‐metal (DSM) and Au layers, the tunable propagation properties hybrid modes are systematically investigated in mid‐infrared regime, including effects temperatures, Fermi levels, rotation angles. Interestingly, due to importance inter‐band transition spectral strong temperature related epsilon‐near‐zero (ENZ) phenomenon has manifested near frequency. Namely, below room temperature, real part effective refractive index...

Abstract The efficiency of solar energy capture by terrestrial and device surfaces is significantly influenced the variations in angle incidence, which change with latitude, season, time day. These fluctuations result notable density losses. Photoelectrochemical (PEC) system‐based artificial leaf has attracted immense research interests recently. However, its programmability adaptiveness highly desired noticeably lacking. In this study, a novel programmable biomimetic PEC system—artificial...

Carbon-based materials, such as graphene and carbon nanotubes, have emerged a transformative class of building blocks for state-of-the-art metamaterial devices due to their excellent flexibility, light weight, tunability. In this work, tunable carbon-based metal-free terahertz (THz) metasurface with ultrabroadband absorption is proposed, composed alternating graphite patterns, where the Fermi level adjusted by varying applied voltage bias achieve characteristics. particular, when 1 eV,...

Abstract A significant class of semiconductor nanostructures, colloidal quantum dots (CQDs), which exhibit narrow emission spectrum and tunable frequency, are utilized for numerous flexible wearable applications including state‐of‐the‐art display, biological sensing, showcasing great prospects in physiological measurement, health monitoring, rehabilitation. Interestingly, synthesizing these particles using methods such as hot injection colloids can directly tune their optical properties...

Vanadium dioxide (VO2) exhibits multiple insulating states and complex transitions, both among these to a metallic rutile (R) phase. In this study, we investigate freestanding VO2 microbeams that undergo reversible transitions from an triclinic (T) phase monoclinic (M2) phase, followed by transition the R The latent heat changes associated with first-order are monitored using recently developed chip-based differential scanning calorimetry technique, which demonstrates exceptional sensitivity...

Resolution and field-of-view often represent a fundamental tradeoff in microscopy. Atomic force microscopy (AFM), which cantilevered probe deflects under the influence of local forces as it scans across substrate, is key example this with high resolution imaging being largely limited to small areas. Despite tremendous impact AFM fields including materials science, biology, surface limitation area has remained barrier studying samples intricate hierarchical structure. Here, we show that...

Using a novel method developed to quantify the polarizability of photoluminescent nanoparticles in water, we present experimental observations extraordinary exhibited by commensurate size with Debye screening length, confirming previously reported theory. Semiconductor quantum dots (QDs) are ideal model demonstrate this assay, due their tunable and bright photoluminescence. This assay is based upon microfluidic chambers microelectrodes that generate trapping potentials weaker than thermal...

Nonuniform electric fields cause polarizable particles to move through an effect known as dielectrophoresis (DEP). Additionally, the themselves create nonuniform due their induced dipoles. When field of one particle causes another move, it represents a path hierarchical assembly termed mutual DEP (mDEP). Anisotropic potentially provide further opportunities for intense and intricate local profiles. Here, we construct theoretical framework describing anisotropic templates mDEP by considering...

A suspension of nanoparticles with very low volume fraction is found to assemble into a macroscopic cellular phase that composed particle-rich walls and particle-free voids under the collective influence AC DC voltages. Systematic study this transition shows it was result electrophoretic assembly two-dimensional configuration followed by spinodal decomposition particle-poor cells mediated principally electrohydrodynamic flow. This mechanistic understanding reveals two characteristics needed...

Abstract Phase change materials can enable temperature self-regulation due to their drastic changes in optical properties accompanying the phase transition. Significant reduction of absorption after transition is key ingredient for an enhanced regulating performance. However, absorptivity unpatterned vanadium dioxide (VO 2 ) thin films hardly be reduced at visual-to-infrared band. In this work, we combine direct binary search (DBS) and particle swarm optimization (PSO) algorithms optimized...