Researchers demonstrate broad-band lead halide perovskite quantum dot single-mode lasers

A research team from the Shanghai Institute of Optics and Fine Mechanics has recently demonstrated perovskite CQDs (colloidal quantum dots) single-mode laser with good performance across the entire visible spectra range.

In this study, a composited microcavity was obtained through the conformal deposition of cesium lead halide perovskite (LHP) CQDs on a high quality individual sub-micron ZnO rod by dip-coating self-assembled techniques. A single-mode lasing with high quality factor and low threshold was obtained.

Researchers achieve stable room-temperature continuous-wave lasing in quasi-2D perovskite films

An international team of researchers led by Kyushu University and Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, has demonstrated stable, continuous lasing at room temperature for over an hour perovskite materials by managing to overcome a phenomenon that has so far prevented such long operation.

Recent developments in perovskite research have made them attractive for lasers because they can be fabricated from solution at low cost to have tunable colors and excellent stability, but a phenomenon termed lasing death causes lasing under constant operation at room temperature to stop after a few minutes for reasons that have been unclear.

Perovskites enable small semiconductor laser that works in visible range at room temperature

An international team of researchers has announced the development of the world's most compact perovskite-based semiconductor laser that works in the visible range at room temperature. According to the authors of the research, the laser is a nanoparticle of only 310 nanometers in size (which is 3,000 times less than a millimeter) that can produce green coherent light at room temperature.

The scientists succeeded in exploiting the green part of the visible band, which was considered problematic for nanolasers. "In the modern field of light-emitting semiconductors, there is the 'green gap' problem," says Sergey Makarov, principal investigator of the article and professor at the Faculty of Physics and Engineering of ITMO University. "The green gap means that the quantum efficiency of conventional semiconductor materials used for light-emitting diodes falls dramatically in the green part of the spectrum. This problem complicates the development of room temperature nanolasers made of conventional semiconductor materials."

Researchers aim for single-mode Nano-lasers from all-inorganic perovskite material

An all-inorganic perovskite micro/nano-structure has been demonstrated by a collaborative team of researchers from Shanghai Institute of Optics and Fine Mechanics of the Chinese Academy of Sciences (CAS), Shanghai Institute of Technical Physics of CAS and Nanjing Xiaozhuang University, that is believed to be a promising candidate for achieving high-performance nano-lasers.

Semiconductor nano-lasers with high spectral purity and stability, namely single-mode nano-lasers, are very desirable in color laser display, on-chip optical communication and computing. To date, most of reported nano-lasers exhibit multi-mode structure resulting from in-homogeneous gain saturation, while the realization of high-quality single-mode laser is very challenging and is largely limited by the cavity structure and the properties of the gain medium.

Israeli-German researchers demonstrate continuous lasing action in devices made from perovskite materials

A collaborative study between Tel Aviv University (TAU) in Israel and Karlsruhe Institute of Technology (KIT) in Germany demonstrates remarkable continuous lasing action in devices made from perovskites.

"In contrast to previous studies around the world, this is the first study to exhibit continuous lasing action, as opposed to pulsed operation," says Prof. Jacob Scheuer of TAU's Department of Physical Electronics, who led the TAU team of researchers. "This family of materials is considered the most promising candidate for a future laser-based industry, because their fabrication is simple, fast and inexpensive compared to current semiconductor materials being used for these purposes. In addition, these materials can support the realization of solid-state lasers emitting in green, necessary for future lighting, displays and projectors," Prof. Scheuer adds. "Current semiconductor lasers emit light only in red and blue."