Article 2 – A Low-Profile Dual-Polarized Transmitarray with Enhanced Gain and Beam Steering at Ku Band

Abstract: An important feature of Cr3+ is the ability to tune the absorption and emission spectra by changing the host. However, in some cases, different emission spectra can be detected in samples with similar Racah parameters. The present paper reports changes in the luminescence properties of Cr3+:YGG nanocrystals. Cr3+:YGG nanocrystals

Abstract: Developing efficient Er3+,Yb3+:YAG eye-safe lasers is a priority of modern laser technology. This paper focuses on the influence of the concentration of Yb3+ ions on the spectroscopic properties of Er3+,Yb3+:YAG transparent ceramics. Four samples with different concentrations of Yb3+ ions were prepared by solid-state reaction sintering. The study revealed

Abstract: Unintentionally doped (UID), Mn, and Mn-Si doped β-Ga2O3 polycrystalline samples were synthesized by high-temperature solid-state chemical reaction. UID β-Ga2O3 has intense host emission in the 350–550 nm wavelength range. The intensity of the luminescence bands in the UV, blue, and green spectral regions decreased strongly by approximately 1000 times in

Abstract: In this work, a novel indium fluoride glass 2-input-1-output fiber combiner was designed and fabricated to combine two Interband Cascade Laser (ICL) sources emitting in the mid-infrared wavelength range. To test the combiner performance, a dual-gas quartz-enhanced photoacoustic spectroscopy sensor was demonstrated for the detection of carbon dioxide (CO2)

Abstract: A low profile dual polarized transmitarray antenna, made of three identical layers, is proposed in this paper for Ku-band applications. The transmitarray comprises 22 × 22 symmetrical unit cells. A 3-bit phase compensation layer with less than αT = 1.3 dB transmission loss and 2π transmission phase coverage for

Abstract: This paper illustrates the first S-tapered optical fiber obtained by employing fluoride glass, via off-axis pulling and filament heating. The S-tapered optical fiber has been designed via three-dimensional beam propagation method and its performance with respect to the surrounding refractive index has been numerically predicted. The fabrication has been