Tunable dielectric metasurfaces by structuring the phase-change material.

Metasurfaces have made great progress in the last decade for generating miniature and integrated optical devices. The optical properties of metasurfaces can be tuned dynamically by integrating with phase-change materials. However, the efficiency of tunable metasurfaces remains a bit low, which is a disadvantage for the realistic applications of metasurfaces.

Reflective temperature sensor based on a fiber Bragg grating combined with a fiber loop ringdown technique.

In this paper, a reflective fiber sensing system combined with a fiber loop ringdown technique for temperature detection is proposed. A fiber Bragg grating (FBG) with an initial center wavelength of 1543.33 nm was set as the sensor head.

[Preparation and Luminescent Properties of Blue Emitting Phosphor of Sr₃ (PO₄)₂: Eu²⁺ for White LED].

A series of Sr₃ (PO₄)₂: Eu²⁺ blue phosphors were synthesized by high temperature solid state method under N₂-H₂ reducing atmosphere. The crystal structures, excitation and emission spectra were characterized by X-ray diffraction (XRD) and Photoluminescence (PL), respectively. The results show that the Sr₃ (PO₄)₂: Eu²⁺ phosphor can be efficiently excited by the wavelengths ranging from 310 to 390 nm, and the excitation peak wavelength locates at 359 nm.

A library of L-tyrosine-derived biodegradable polyarylates for potential biomaterial applications, part I: synthesis, characterization and accelerated hydrolytic degradation.

A combinatorial library of biodegradable polyarylates derived from L-tyrosine was synthesized and characterized. These polyarylates are A-B-type co-polymers consisting of a cyclic dipeptide and a diacid. General structure-property correlations were established by comparing aryl diacid co-polymers and aliphatic diacid co-polymers.