Resonantly Pumped Bright-Triplet Exciton Lasing in Cesium Lead Bromide Perovskites.

The surprising recent observation of highly emissive triplet-states in lead halide perovskites accounts for their orders-of-magnitude brighter optical signals and high quantum efficiencies compared to other semiconductors. This makes them attractive for future optoelectronic applications, especially in bright low-threshold nanolasers. While nonresonantly pumped lasing from all-inorganic lead-halide perovskites is now well-established as an attractive pathway to scalable low-power laser sources for nano-optoelectronics, here we showcase a resonant optical pumping scheme on a fast triplet-state in CsPbBr nanocrystals.

Color controllable polarization entanglement generation in optical fiber at telecommunication wavelengths.

This article proposes a polarized entangled photon source in optical fiber with low Raman noise that features the controllable generation of specific signal and idler wavelengths (colors) by varying the pump power. The novel two color source can provide needed telecom entangled photon wavelengths for applications in quantum communications, quantum computing, and quantum imaging.

Noninvasive high resolving power entangled photon quantum microscope.

A noninvasive high resolving power quantum microscope would facilitate progress in the areas of research and development in biosciences as well as in the area of biomedical technology. Longer-wavelength microscopes, i.e.