Transparent and Thermally Stable Rare-Earth-Doped Luminescent Gallate Glass toward Passive Daytime Radiative Cooling Applications.

Currently, the implementation of passive daytime radiative cooling based on zero-energy cooling methodologies primarily focuses on polymers and composite materials, whereas the available literature on all-inorganic materials is relatively few. Here, we present a novel microcrystalline glass material CaGaAlO (CGAO), doped with rare-earth elements and prepared by the high-temperature melting method. This material exhibits long-term stability at 200 °C, coupled with an effective infrared radiation cooling function, demonstrating a 4.

Realization of Broadband Near-Infrared Emission with High Thermal Stability in YGa(BO): Cr Borate Phosphor.

As a key material for phosphor-converted light-emitting diodes (pc-LEDs) applications, broadband near-infrared (NIR) phosphors currently face poor thermal stability issues. In this work, we synthesized a broadband near-infrared phosphor YGa(BO): Cr (YGBO: Cr) with a high thermal stability. The YGBO: Cr sample exhibits a broadband near-infrared emission centered at 770 nm with a full width at half-maximum (fwhm) of 2130 cm under blue light excitation.

An up-conversion BaIn(PO):Er/Yb phosphor that enables multi-mode temperature measurements and wide-gamut 'temperature mapping'.

At present, most fluorescent materials that can be used for optical temperature measurement exhibit poor thermochromic performance, which limits their applications. In this study, the phosphor BaIn(PO):Er/Yb was synthesized with a high doping concentration of Yb, and it emitted composition- and temperature-induced wide color gamut up-conversion luminescence from red to green. Four modes of fluorescence thermometry can be realized in the temperature range of 303-603 K, which is based on the ratio of fluorescence intensity between thermally coupled energy levels and non-thermally coupled energy levels, color coordinate shift, and fluorescence decay lifetime, respectively.

Multi-watt sub-30 ns passively Q-switched Yb:LuPO/WS miniature laser operating under high output couplings.

We report on a miniature Yb:LuPO crystal laser at 1.01 μm that is passively Q-switched with a sapphire-based few-layer WS saturable absorber, and that can be operated under very high output couplings (≥80%). With 12.

Watt-level passively Q-switched Yb:LuPO miniature crystal laser with few-layer MoS saturable absorber.

We demonstrate a Yb:LuPO miniature crystal laser that is formed with a 5 mm long plane-parallel resonator, and is passively Q-switched by a few-layer MoS saturable absorber. With 6.53 W of pump power absorbed, an average output power of 2.

Growth, structural, thermal, dielectric and optical studies on HBST crystal: A potential THz emitter.

The efficient organic nonlinear optical material 4-hydroxy benzaldehyde-N-methyl 4-stilbazolium tosylate (HBST) was grown from methanol by slope nucleation method combined with slow cooling (SNM-SC) for the first time. The optimum growth conditions based on the cooling rate was further investigated. The single crystal X-ray diffraction (XRD) revealed that the chromophores of HBST crystal make an angle of about 33° with respect to the a-axis, which is close to the optimum of Terahertz (THz)-wave generation and electro-optics applications.

Spectroscopic properties and continuous-wave laser operation of Yb:LuPO₄ crystal.

For the first time, and to the best of our knowledge, we report a continuous-wave (cw) laser operation of Yb:LuPO₄ crystal, demonstrated at room temperature in a compact plano-concave resonator end pumped by a diode laser. 1.61 W of cw output power around 1039 nm were generated with 2.