External cavity diode lasers (ECDLs) integrate a semiconductor gain medium with an optical resonator external to the diode chip, enabling precise wavelength control, narrow spectral linewidths and ...

In a recent Nature study, scientists have demonstrated an electrically driven perovskite laser using a dual-cavity design, addressing a challenge that has persisted in the field for over a decade. The ...

GaN-based vertical-cavity surface-emitting lasers (VCSELs) are promising for displays, sensing and optical communication, but improving efficiency remains challenging. Researchers have now shown that ...