Volume 14 Issue 2, February 2020

Quantitative phase gradient images can now be captured in a single shot thanks to the use of two layers of compact, multifunctional dielectric metasurfaces.

Accessing the physics of higher-than-three-dimensional systems is naturally challenging. Researchers have now demonstrated that light dynamics in a one-dimensional array of carefully arranged photonic waveguides mimics the time evolution of particles in high-dimensional lattices.

Careful harvesting of triplet excitons allows the realization of efficient green-emitting quasi-2D perovskite LEDs.

The behaviour of multi-dimensional excitation dynamics and localization transition is synthesized in one-dimensional lattices formed by planar photonic structures.

Luminescent CsPbBr₃ quantum dots can be written into glass using femtosecond laser pulses and thermal annealing, and erased by further femtosecond laser irradiation. The resulting quantum dot patterns could prove useful for data storage, decoration or security purposes.

One- and zero-dimensional optical states are revealed in photonic higher-order topological insulators.

Surface stimulated Raman scattering-based lasing is achieved using just a monolayer of molecules on silica optical microresonators.

The orbital angular momentum degree of freedom is used to demonstrate 10 bit holographic images with a helical mode index spanning from −50 to 50.

Using two dielectric metasurface layers, a compact quantitative phase gradient microscope that can capture quantitative phase gradient images in a single shot is reported with phase gradient sensitivity better than 92.3 mrad μm⁻¹ and single-cell resolution.

Higher-order (fifth and seventh order) coherent anti-Stokes Raman scattering microscopy is demonstrated to break the diffraction limit for label-free super-resolution vibrational imaging for live cells such as HeLa and buccal cells.

Localized photodoping in mixed-cation perovskites is shown to modify charge-carrier recombination and thus offer a route for more efficient light emission.