Abstract Cr3+/Cr4+‐activated near‐infrared (NIR) luminescent materials have attracted
extensive attention owing to their tunable emission wavelength and widespread applications …

Abstract Development of chromium‐doped luminescent materials is pertinent to many
emerging applications, ranging from agriculture, food industry to noninvasive health …

The rapid development of emerging technologies observed in recent years, such as artificial
intelligence, machine learning, mobile internet, big data, cloud computing, and the Internet …

Lasing typically starts from fluorescence, and the laser wavelength is therefore limited to the
fluorescence spectrum of the gain material. Accessing wavelengths beyond this intrinsic …

Since the first invention of the laser in 1960, direct lasing outside the fluorescence spectrum
is deemed impossible owing to the “zero-gain” cross-section. However, when electron …

Cr3+-Doped phosphors are attracting attention for broadband near-infrared (NIR)
applications. However, some mechanisms are still unclear due to the entangled …

Ultrabroadband infrared transition metal ion-doped solid-state lasers have come of age and
are increasingly being used in trace gas monitoring, remote sensing, telecommunications …

The chromium ion is among the most widely explored and used laser-active ions.
Depending on the charge state of the laser-active chromium ion in the host, tunable …

This paper provides a detailed description of the preparation and characterization of
diffusion-doped Cr2+: ZnSe and Fe2+: ZnSe. In the experiments, Cr2+: ZnSe samples with …

Abstract Cr: Colquiriite laser materials (Cr: LiCAF, Cr: LiSAF, Cr: LiSGaF) own broad
absorption bands in the visible region that allow direct-diode pum** by well-developed …