Optoelectronics with single layer group-VIB transition metal dichalcogenides
The discovery of two-dimensional (2D) materials has opened up new frontiers and challenges for exploring fundamental research. Recently, single-layer (SL) transition metal dichalcogenides (TMDCs) have emerged as candidate materials for electronic and …
Measuring the internal quantum efficiency of light-emitting diodes: towards accurate and reliable room-temperature characterization
For accurate and reliable measurement of the internal quantum efficiency (IQE) of light-emitting diodes (LEDs), the method should be theoretically solid and experimentally simple to use without any prior assumption of physical parameters or complicated …
Optical slot antennas and their applications to photonic devices
We present optical slot antennas and their applications to photonic devices. We show that metallic nanoslots have the properties of a slot antenna by measuring the transmission spectra and far-field radiation patterns and then prove that they can be …
Focused-ion-beam-based nano-kirigami: from art to photonics
Kirigami, i.e. the cutting and folding of flat objects to create versatile shapes, is one of the most traditional Chinese arts that has been widely used in window decorations, gift cards, festivals, and various ceremonies, and has recently found intriguing …
Insights into the intracellular behaviors of black-phosphorus-based nanocomposites via surface-enhanced Raman spectroscopy
As one of the prospective two-dimensional nanomaterials, black phosphorus (BP), which has excellent physical and chemical properties, has witnessed quick development in theranostic applications. The more recent advances in combining BP nanosheet (NS) with …
Lattice effect influence on the electric and magnetic dipole resonance overlap in a disk array
Designing the shape of silicon nanoparticles has been shown to be an effective approach to increasing overlap between electric and magnetic dipole resonances thereby achieving directional scattering and decrease of reflection. Variations of disk diameter …
All-optical controllable electromagnetically induced transparency in coupled silica microbottle cavities
An all-optical control scheme of electromagnetically induced transparency (EIT) based on two coupled silica microbottle cavities coated with iron oxide nanoparticles is proposed and experimentally demonstrated. The specially designed and fabricated silica …
Photonic welding points for arbitrary on-chip optical interconnects
Photonic integrated circuits (PICs) are an ideal platform for chip-scale computation and communication. To date, the integration density remains an outstanding problem that limits the further development of PIC-based photonic networks. Achieving low-loss …
Silent enhancement of SERS signal without increasing hot spot intensities
Plasmonic nanostructures enhance nonlinear response, such as surface enhanced Raman scattering (SERS), by localizing the incident field into hot spots. The localized hot spot field can be enhanced even further when linear Fano resonances take place in a …