Issue 2 (2018)

Three-dimensional nanoscale imaging by plasmonic Brownian microscopy

Three-dimensional nanoscale imaging by plasmonic Brownian microscopy

Three-dimensional (3D) imaging at the nanoscale is a key to understanding of nanomaterials and complex systems. While scanning probe microscopy (SPM) has been the workhorse of nanoscale metrology, its slow scanning speed by a single probe tip can …

Role of the substrate in monolithic AlGaAs nonlinear nanoantennas

Role of the substrate in monolithic AlGaAs nonlinear nanoantennas

We report the effect of the aluminum oxide substrate on the emission of monolithic AlGaAs-on-insulator nonlinear nanoantennas. By coupling nonlinear optical measurements with electron diffraction and microscopy observations, we find that the …

Designing optimal nanofocusing with a gradient hyperlens

Designing optimal nanofocusing with a gradient hyperlens

We report the design of a high-throughput gradient hyperbolic lenslet built with real-life materials and capable of focusing a beam into a deep sub-wavelength spot of λ/23. This efficient design is achieved through high-order transformation optics …

Fabrication and characterization of Au dimer antennas on glass pillars with enhanced plasmonic response

Fabrication and characterization of Au dimer antennas on glass pillars with enhanced plasmonic response

We report on the fabrication and dark-field spectroscopy characterization of Au dimer nanoantennas placed on top of SiO2 nanopillars. The reported process enables the fabrication of nanopillar dimers with gaps down to 15 nm and heights up to 1 μm. …

Highly doped semiconductor plasmonic nanoantenna arrays for polarization selective broadband surface-enhanced infrared absorption spectroscopy of vanillin

Highly doped semiconductor plasmonic nanoantenna arrays for polarization selective broadband surface-enhanced infrared absorption spectroscopy of vanillin

Tailored plasmonic nanoantennas are needed for diverse applications, among those sensing. Surface-enhanced infrared absorption (SEIRA) spectroscopy using adapted nanoantenna substrates is an efficient technique for the selective detection of …

Active material, optical mode and cavity impact on nanoscale electro-optic modulation performance

Active material, optical mode and cavity impact on nanoscale electro-optic modulation performance

Electro-optic modulation is a key function in optical data communication and possible future optical compute engines. The performance of modulators intricately depends on the interaction between the actively modulated material and the propagating …

The controllable intensity and polarization degree of random laser from sheared dye-doped polymer-dispersed liquid crystal

The controllable intensity and polarization degree of random laser from sheared dye-doped polymer-dispersed liquid crystal

The random laser from sheared dye-doped polymer-dispersed liquid crystal (DDPDLC) is investigated. As the emission intensity weakens, the threshold of random laser from DDPDLC increases from 2.0 mJ/pulse to 4.0 mJ/pulse, and the degree of …

Programmable optical processor chips: toward photonic RF filters with DSP-level flexibility and MHz-band selectivity

Programmable optical processor chips: toward photonic RF filters with DSP-level flexibility and MHz-band selectivity

Integrated optical signal processors have been identified as a powerful engine for optical processing of microwave signals. They enable wideband and stable signal processing operations on miniaturized chips with ultimate control precision. As a …

Nanostructures induced light harvesting enhancement in organic photovoltaics

Nanostructures induced light harvesting enhancement in organic photovoltaics

Lightweight and low-cost organic photovoltaics (OPVs) hold great promise as renewable energy sources. The most critical challenge in developing high-performance OPVs is the incomplete photon absorption due to the low diffusion length of the carrier …

Cavity nonlinear optics with layered materials

Cavity nonlinear optics with layered materials

Unprecedented material compatibility and ease of integration, in addition to the unique and diverse optoelectronic properties of layered materials, have generated significant interest in their utilization in nanophotonic devices. While initial …

Mid-infrared integrated photonics on silicon: a perspective

Mid-infrared integrated photonics on silicon: a perspective

The emergence of silicon photonics over the past two decades has established silicon as a preferred substrate platform for photonic integration. While most silicon-based photonic components have so far been realized in the near-infrared (near-IR) …