Angularly Dispersed Vector Vortex Laser Generated by Exciton-Polariton Condensate in a Perovskite Microplatelet.

Vector vortex beams with space-dependent phase distribution and polarization have been extensively studied for their various applications, such as optical imaging and communication. While conventional vortex beam lasers emit parallel light with phase singularities in real space, we here demonstrate a divergent vortex beam laser whose phase singularities are pinned to the featured azimuthal positions. The coherent beam was generated by the condensation of exciton-polaritons, hybrid quasi-particles from strongly coupled excitons and cavity-confined photons, in a CsPbBr microplatelet.

Microfluidic SERS biosensor based on Au-semicoated photonic crystals for melanoma diagnosis.

Surface-enhanced Raman scattering (SERS) shows great promise for early diagnosis due to its high specificity and rapid detection capabilities. However, its application is often hindered by substrate instability and insufficient interaction between the substrate and incident light. To address these challenges, a photonic-plasmonic strategy is often employed to enhance sensing performance but it is generally limited by the low efficiency of plasmonic metal and optical cavity resonances.

Continuous-Wave Pumped Monolayer WS Lasing for Photonic Barcoding.

Micro/nano photonic barcoding has emerged as a promising technology for information security and anti-counterfeiting applications owing to its high security and robust tamper resistance. However, the practical application of conventional micro/nano photonic barcodes is constrained by limitations in encoding capacity and identification verification (e.g.

Fluorescent incandescent light sources from individual quadrilateral ZnO microwire via Ga-incorporation.

By means of nanophotonics principle, the thermal radiation can be tailored, thus, traditional tungsten lamp light source can glow the vitality and the vigor due to the low-efficiency approaching to commercial fluorescent or light-emitting diode bulbs. However, too far by demanding exacting terms, such as high-temperature thermal radiation (∼ 3000 K), high-vacuum encapsulation technology, restricted spectrally controllable source and so on, tungsten-based incandescent lamp filament has greatly limited the application in lighting, diagnosis and treatment, communication, imaging, etc. Herein, individual Ga-doped ZnO microwires (ZnO:Ga MWs) were successfully synthesized, which can be utilized to construct typical incandescent sources.

Wavelength-Tunable Waveguide Emissions from Electrically Driven Single ZnO/ZnO:Ga Superlattice Microwires.

Because of the superlattice structures comprising periodic and alternating crystalline layers, one-dimensional photon crystals can be employed to expand immense versatility and practicality of modulating the electronic and photonic propagation behaviors, as well as optical properties. In this work, individual superlattice microwires (MWs) comprising ZnO and Ga-doped ZnO (ZnO/ZnO:Ga) layers were successfully synthesized. Wavelength-tunable multipeak emissions can be realized from electrically driven single superlattice MW-based emission devices, with the dominant wavelengths tuned from ultraviolet to visible spectral regions.