Reaction nanoscopy of ion emission from sub-wavelength propanediol droplets
Droplets provide unique opportunities for the investigation of laser-induced surface chemistry. Chemical reactions on the surface of charged droplets are ubiquitous in nature and can provide critical insight into more efficient processes for industrial …
Polariton hybridization phenomena on near-field radiative heat transfer in periodic graphene/a-MoO_3 cells
Coupling of surface plasmon polaritons (SPPs) supported by graphene and hyperbolic phonon polaritons (HPPs) supported by hyperbolic materials (HMs) could effectively promote photon tunneling, and hence the radiative heat transfer. In this work, we investigate …
Experimental observations of communication in blackout, topological waveguiding and Dirac zero-index property in plasma sheath
The plasma sheath causes the spacecraft’s communication signal to attenuate dramatically during the re-entry period, which seriously threatens the astronauts. However, valid experimental protocols have not been obtained hitherto. To realize the propagation …
Strongly coupled Raman scattering enhancement revealed by scattering-type scanning near-field optical microscopy
Recent advances in near-field technology with an ultrahigh spatial resolution breaking optical diffraction limit, make it possible to further identify surface-enhanced Raman scattering (SERS) enhancement theories, and to monitor the SERS substrates. Here we …
Terahertz nanospectroscopy of plasmon polaritons for the evaluation of doping in quantum devices
Terahertz (THz) waves are a highly sensitive probe of free carrier concentrations in semiconducting materials. However, most experiments operate in the far-field, which precludes the observation of nanoscale features that affect the material response. Here, …
Spin–orbit interactions in plasmonic crystals probed by site-selective cathodoluminescence spectroscopy
The study of spin–orbit coupling (SOC) of light is crucial to explore the light–matter interactions in sub-wavelength structures. By designing a plasmonic lattice with chiral configuration that provides parallel angular momentum and spin components, one …
Implementing of infrared camouflage with thermal management based on inverse design and hierarchical metamaterial
Infrared camouflage is an effective technique to avoid many kinds of target detection by detectors in the infrared band. For a high-temperature environment, thermal management of selective emission is crucial to dissipate heat in the mid-infrared …
Stable single-mode operation of distributed feedback quantum cascade laser under high current via a grating reflector
We report on an index-coupled distributed feedback (DFB) quantum cascade lasers (QCLs) of high single-mode stability by using of a grating reflector (GR) to reflect effectively light of a specific wavelength. Fabrications of the QCLs were performed with …
Wide-angle deep ultraviolet antireflective multilayers via discrete-to-continuous optimization
To date, various optimization algorithms have been used to design non-intuitive photonic structures with unconventional optical performance. Good training datasets facilitate the optimization process, particularly when an objective function has a non-convex …
Active 3D positioning and imaging modulated by single fringe projection with compact metasurface device
Three-dimensional (3D) information is vital for providing detailed features of the physical world, which is used in numerous applications such as industrial inspection, automatic navigation and identity authentication. However, the implementations of 3D …
Enhanced cutoff energies for direct and rescattered strong-field photoelectron emission of plasmonic nanoparticles
The efficient generation, accurate detection, and detailed physical tracking of energetic electrons are of applied interest for high harmonics generation, electron-impact spectroscopy, and femtosecond time-resolved scanning tunneling microscopy. We here …