Niobium tellurium (NbTe2) as known as a kind of typical layered metallic transition metal dichalcogenides (MTMDCs), has drawn considerable attention because of its extraordinary physical properties, such as superconductivity, and...

Digital light processing 3D printing and pressureless sintering are combined to construct color‐tunable all‐inorganic functional composites by a simple and general strategy. The insertion of Y3Al5O12:Ce (YAG:Ce) into silica glass (YAG:Ce‐PiSG) is realized by pressureless sintering based on silica nanocomposites for 3D printing, which effectively controls the intense interface reaction between phosphor and substrate. The chromaticity of YAG:Ce‐PiSG‐based white light‐emitting diodes (WLEDs) shifts from blue‐white to white and yellow, and the 3D‐printed dome structure aids in the heat dissipation and pump blue light utilization. In addition, a series of red‐emitting color converters (CASN:Eu‐PiBSG) are synthesized by cofiring CaAlSiN3:Eu (CASN:Eu) with low softening‐point borosilicate glass powders, overcoming the fatal drawback of inherently low thermal performance. The chromaticity of integrated YAG:Ce‐PiSG/CASN:Eu‐PiBSG‐based WLEDs benefiting from 3D printing technology is adjusted in the color range from cold white to warm white. A warm WLED with high luminous efficiency (92.6 lm W−1) and excellent color rendering index (90.2) is successfully assembled. The 3D printed customizable phosphor–glass composites offer a great potential to develop high‐power and color‐tunable WLEDs, which are also of great significance for developing innovative glass composites with high‐temperature stability.

The traditional angular spectrum method has an inherent problem that the region of diffraction propagation should be homogeneous. However, in some cases, the medium of the diffraction propagation region is inhomogeneous. In this Letter, based on iteration we proposed the non-uniform angular spectrum method for diffraction propagation calculation in a complex medium. By phase pre-processing in the spatial domain and diffraction calculation in the spatial frequency domain, the diffraction propagation problem of the light field in a complex medium is solved. Theoretical formulation and numerical examples as well as experimental investigation are presented to confirm the validity of the proposed method. The advantages of this method include faster computation, smaller memory requirement, and the ability to compute a larger area compared with the finite element method as well as the ability to compute the non-paraxial case compared with the standard fast Fourier transform beam propagation method.