Optical micro/nano-spherical cavities can be designed to confine light by generating resonances in whispering gallery modes (WGM) and then couple them into the substrate through leaky modes, which can be potentially used in thin film solar cells for absorption enhancements. In this work, the transparent ZnO electrodes in a hollow nanosphere (HNS) structure were proposed as WGM resonators to tra...

The phase of graphene plasmon upon edge-reflection plays a crucial role on determining the spectral properties of graphene structures. In this article, by using the full-wave simulation, we demonstrate that the mid-infrared graphene plasmons are nearly totally reflected at the boundary together with a phase jump of approximately 0.27π, regardless of the environments surrounding it. Appling this...

Metal nanostructures at sub-wavelength scale have been used as plasmonic diffraction gratings and negative index metamaterials and have attracted interests in materials engineering and optics research. E-beam lithography is commonly used to fabricate these metal nanostructures; however, e-beam lithography has limitation in scale-up of nanostructure fabrication and is expensive. In this study, a...

Drawing inspiration from radio-frequency technologies, we propose a realization of nano-scale optical dielectric resonator antennas (DRAs) functioning in their fundamental mode. These DRAs operate via displacement current in a low-loss high-permittivity dielectric, resulting in reduced energy dissipation in the resonators. The designed nonuniform planar DRA array on a metallic plane imparts a s...

This article reviews mechanically-tunable photonic devices with on-chip integrated MEMS/NEMS actuators. With related reports mostly published within the last decade, this review focuses on the tuning mechanisms of various passive silicon photonic devices, including tunable waveguides, couplers, ring/disk resonators, and photonic crystal cavities, and their results are selectively elaborated upo...

Nanomechanical resonators have an unprecedented mass sensitivity sufficient to detect single molecules, viruses or nanoparticles. The challenge with nanomechanical mass sensors is the direction of nano-sized samples onto the resonator. In this work we present an efficient inertial sampling technique and gravimetric detection of airborne nanoparticles with a nanomechanical resonant filter-fiber....

An ultra-wideband band-stop plasmonic filter (UWB-BSF) in mid-infrared (MIR) range based on metal–insulator–metal (MIM) waveguide coupled with a hexagonal resonator is proposed this work. Using RSoft CAD commercial software, the designed BSF numerically and theoretically investigated by 2D Finite-Difference Time-Domain method. To enhance BSFs system mid-infrared, obtaining ultra-wide bandgap wi...

In this work, an ultra-wideband (UWB) optical bandpass filter (BPF) based on nanoplasmonic structure is designed and thoroughly analyzed. The proposed BPF encompasses asymmetric metal-insulator-metal (MIM) slot waveguide that incorporates a gap-coupled series parallel square ring resonators (SRRs). characteristic parameters of the MIM are analyzed with full-wave analysis conformal mapping techn...

In this research, we will seek to design and numerically evaluate a refractive index nano-sensor based on the resonant system with metal insulating waveguide (MIM) that forms wide range of wavelengths. To proposed sensor structure, use two cavities rings different dimensions plasmonic waveguides. After designing examine wavelengths resonators by finite difference method time domain, because dir...