New Kind of Colloidal Quantum Dot Photodetectors

Intraband absorption and photodetection in heavily doped PbS colloidal quantum dots in the 5–9 μm range

Further Step to Quantum Dot Lasers

A quantum dot LED also operates as an optically pumped laser

Nano Antennas for Data Transfer

For the first time, electrical signals are converted into photons and radiated with a nanooptical antenna

Perovskites Without Lead for Optoelectronics

Barium zirconium sulfide thin films hold great promise for solar cells and LEDs

A Frequency Doubler Controlled by Light

Laser pulse creates frequency doubling in amorphous dielectric material

Nanocomposites for a New Kind of Metalenses

Color superlensing has the potential to assist in surpassing diffraction barrier

A New Near-Infrared Perovskite LED

Highly efficient, large-area and flexible near-infrared light-emitting diodes for new wearable device technologies

Metasurface Reflects Light Only in One Direction

A first optical metasurface with controllable ultrafast time-varying properties breaking optical reciprocity

Spraying Better Solar Cells

Methods of machine learning help to develop high‐performing perovskite solar cells