Published in Japanese Journal of Applied Physics
We propose single-mode vertical cavity surface-emitting lasers (VCSEL) based on the surface grating with various cavity lengths ranging from 10 μm to 1 cm. We present the modeling of surface grating-loaded VCSEL based on the coupled-mode theory with slowing light. Thanks to the low effective index caused by the slow-wave propagation, a shallow surf...
Published in HardwareX
Albedo is the percentage of radiation that a given surface reflects. Its study is important to evaluate thermal effects in buildings, generation capacity with bifacial panels, among others. In this work, the design and validation of a low-cost mobile albedometer is presented, which measures the reflection in 8 spectral bands in the visible, additio...
Published in Frontiers in Physics
Background: To investigate optical coherence tomography angiography (OCTA) quantitative parameters associated with macular neovascularization (MNV) size modifications in age-related macular degeneration. Methods: Study design was prospective, with 1-year of follow-up. All the included MNV eyes were treated by anti-VEGF intravitreal injections. Quan...
Published in Semiconductor Science and Technology
A computational research study of the structural, electronic, and optical characteristics of double half-Heusler alloys Ta2FeNiSn2 and Nb2FeNiSn2 is presented by performing ab initio calculations. The density functional theory framework employs the full-potential linearized augmented plane wave method to solve Kohn–Sham equation as implemented in t...
Published in Nuclear Fusion
The knowledge of optical properties of beryllium is of crucial importance in fields such as nuclear fusion and aerospace applications. The optical properties of pure beryllium are known in the visible and infrared domains. Nevertheless, the role of different physico-chemical parameters such as composition and surface roughness, that is often neglec...
Published in Journal of Physics D: Applied Physics
In the present paper, optical and structural properties of Yb doped ZnO (YZO) are studied for different Yb molar concentrations. The YZO thin films are deposited over the silicon substrate via the sol-gel spin coating method. The range of Yb doping content (concentration) is 0 mol% to 1.5 mol% in ZnO. The morphological variations of the deposited t...
Published in Nanotechnology
Metal nanowires are attractive building blocks for next-generation plasmonic devices with high performance and compact footprint. The complex reflection coefficients of the plasmonic waveguides are crucial for estimation of the resonating, lasing, or sensing performance. By incorporating physics-guided objective functions and constraints, we propos...
Published in Journal of Physics D: Applied Physics
A Co/Mg multilayer was proposed and optimized to work in the broad soft x-ray range of 350–770 eV. The multilayers with a d-spacing of 6.0 nm showed large interface widths of 1.95–1.07 nm which were significantly improved to 0.65–0.62 nm by using a higher Co sputtering power. Grazing incidence x-ray reflectometry, atomic force microscopy, transmiss...
Published in Surface Topography: Metrology and Properties
Diamond wire saw cutting multi-crystalline silicon (mc-Si) wafers has the advantage of high cutting rate. However, it is difficult to follow the current additive-free wet acid etching process to prepare the anti-reflective textured surface due to the obvious saw marks on the surface of the as-sawn wafer. In response to this problem, this paper prop...
This article is dedicated to the study of airborne GNSS-R signal processing techniques for water body detection and edge localization using a low-altitude airborne carrier with high rate reflectivity measurements. A GNSS-R setup on-board a carrier with reduced size and weight was developed for this application. We develop a radar technique for auto...
