Issue 3 (2020)

Active topological photonics

Active topological photonics

Topological photonics emerged as a novel route to engineer the flow of light. Topologically protected photonic edge modes, which are supported at the perimeters of topologically nontrivial insulating bulk structures, are of particular interest as …

III-nitride photonic cavities

III-nitride photonic cavities

Owing to their wide direct bandgap tunability, III-nitride (III-N) compound semiconductors have been proven instrumental in the development of blue light-emitting diodes that led to the so-called solid-state lighting revolution and blue laser diodes …

Single-particle perovskite lasers: from material properties to cavity design

Single-particle perovskite lasers: from material properties to cavity design

Last decade, halide perovskites demonstrate high potential for efficient, tunable, and cheap photonic sources. Recently, single-particle perovskite lasers of various compositions and shapes with all dimensions close or smaller than the emitted …

All-optical targeted drug delivery and real-time detection of a single cancer cell

All-optical targeted drug delivery and real-time detection of a single cancer cell

Targeted drug delivery and real-time detection both play an important role for studying the specificity of a single cancer cell and the development of anticancer drugs. However, a method that simultaneously enables safe and efficient targeted drug …

Independent engineering of individual plasmon modes in plasmonic dimers with conductive and capacitive coupling

Independent engineering of individual plasmon modes in plasmonic dimers with conductive and capacitive coupling

We revisit plasmon modes in nanoparticle dimers with conductive or insulating junction resulting in conductive or capacitive coupling. In our study, which combines electron energy loss spectroscopy, optical spectroscopy, and numerical simulations, …

Engineering multimodal spectrum of Cayley tree fractal meta-resonator supercells for ultrabroadband terahertz light absorption

Engineering multimodal spectrum of Cayley tree fractal meta-resonator supercells for ultrabroadband terahertz light absorption

Self-similar fractals provide a degree of freedom for varying the resonance frequency due to the multiscale geometric features involved and are an ideal candidate for ultrabroadband absorbing devices – especially in the terahertz (THz) band where …

Wideband tunable perfect absorption of graphene plasmons via attenuated total reflection in Otto prism configuration

Wideband tunable perfect absorption of graphene plasmons via attenuated total reflection in Otto prism configuration

A strategy is proposed to achieve wideband tunable perfect plasmonic absorption in graphene nanoribbons by employing attenuated total refraction (ATR) in Otto prism configuration. In this configuration, the Otto prism with a deep-subwavelength …

Manipulating topological valley modes in plasmonic metasurfaces

Manipulating topological valley modes in plasmonic metasurfaces

Coupled light-matter modes supported by plasmonic metasurfaces can be combined with topological principles to yield subwavelength topological valley states of light. This study gives a systematic presentation of the topological valley states …

Performance deterioration of GaN-based laser diode by V-pits in the upper waveguide layer

Performance deterioration of GaN-based laser diode by V-pits in the upper waveguide layer

The effect of V-pits in the upper waveguide (UWG) on device performance of GaN-based laser diodes (LDs) has been studied. Experimental results demonstrate that in comparison with the LDs with u-In0.017Ga0.983N/u-GaN multiple UWG or u-In0.017Ga0.983N …

Multiphysics simulations of adaptive metasurfaces at the meta-atom length scale

Multiphysics simulations of adaptive metasurfaces at the meta-atom length scale

Adaptive metasurfaces (MSs) provide immense control over the phase, amplitude and propagation direction of electromagnetic waves. Adopting phase-change materials (PCMs) as an adaptive medium allows us to tune functionality of MSs at the meta-atom …

Improving nanoscale terahertz field localization by means of sharply tapered resonant nanoantennas

Improving nanoscale terahertz field localization by means of sharply tapered resonant nanoantennas

Terahertz resonant nanoantennas have recently become a key tool to investigate otherwise inaccessible interactions of such long-wavelength radiation with nano-matter. Because of their high-aspect-ratio rod-shaped geometry, resonant nanoantennas …

Shaped femtosecond laser induced photoreduction for highly controllable Au nanoparticles based on localized field enhancement and their SERS applications

Shaped femtosecond laser induced photoreduction for highly controllable Au nanoparticles based on localized field enhancement and their SERS applications

Gold nanoparticles (Au NPs) have a wide range of applications because of their localized surface plasmon resonance properties. Femtosecond laser is considered to be an effective method for preparing Au NPs because of its characteristics of …

Frequency-multiplexed pure-phase microwave meta-holograms using bi-spectral 2-bit coding metasurfaces

Frequency-multiplexed pure-phase microwave meta-holograms using bi-spectral 2-bit coding metasurfaces

In this paper, a dual-band reflective meta-hologram is designed providing two distinct information channels whose field intensity distributions can be independently manipulated at the same time. The proposed pure-phase meta-hologram is composed of …

Photonic spin Hall effect on the surfaces of type-I and type-II Weyl semimetals

Photonic spin Hall effect on the surfaces of type-I and type-II Weyl semimetals

Topological optics is an emerging research area in which various topological and geometrical ideas are being proposed to design and manipulate the behaviors of photons. Here, the photonic spin Hall effect on the surfaces of topological Weyl …