Journal of Optics and Photonics Research

We present a comparative optomechanical analysis of a tunable, monolithic Littrow wavelength-division multiplexer (WDM) integrating silicon nitride waveguides with an enhanced concave diffraction grating. Three device configurations, distinguished by their mechanical boundary conditions and actuation locations, are investigated using coupled finite-element mechanical modeling and fullwave electro…

Polarization control is essential for maintaining the performance and stability of fiber-optic sensing and optical communication systems, since the state of polarization in fiber links is highly susceptible to birefringence variation and environmental perturbations. This review summarizes recent advances in polarization control for fiber links from the perspectives of polarization evolution mecha…

To investigate the potential of barium-based halide perovskites for optoelectronic applications, we performed first-principles density functional theory calculations on XBaCl 3 (X = In, Tl). These calculations were performed using the WIEN2k package, which provides detailed insights into the materials' characteristics. The code provides a silent insight into materials’ characteristics and potenti…

Nanocrystalline mixed ferrites with the general formula Mn x Ni 1-x Fe 2 O 4 ( x = 0.0 to 1.0, in steps of 0.2) were successfully synthesized using the auto-combustion technique. The main objective of this work was to investigate the effect of Mn substitution at Ni sites on the structural and optical properties of NiFe 2 O 4 in the nanocrystalline regime. X-ray diffraction (XRD) reflections were …

The material poly(methyl methacrylate), PMMA, is used for many different purposes, ranging from high-resolution electron beam lithography for microelectronics manufacturing through medical uses such as intraocular lenses and bone cements to the manufacture of automobile taillight covers and as a shatterproof replacement for glass in aquaria, signs, and window coverings. Photostabilization is nece…

This work presents a systematic theoretical investigationand band-structure engineering of p-doped Ge/Si 1−x Ge x multiple quantum wells (MQWs) tailored for mid-infrared (MIR) photonics. Using a self-consistent 6-band k·p Poisson-Schrödinger approach, we establish a predictive simulation framework that rigorously accounts for quantum confinement, epitaxial strain, and many-body interactions. A ke…

This paper presents a performance analysis of a directly modulated direct-detection orthogonal frequency division multiplexing-based visible light communication system designed for high-speed and low-complexity transmission. The proposed architecture employs 16-Quadrature Amplitude Modulation (16-QAM) and achieves a data rate of 15 Gbps over a 500 m line-of-sight link while eliminating the need f…

This study presents a COMSOL Multiphysics-based finite-element workflow for steady-state modeling of second harmonic generation (SHG) in potassium titanyl phosphate. The electromagnetic fields at the fundamental frequency 𝜔 and the second-harmonic frequency 2𝜔 are solved in the frequency domain with explicit nonlinear polarization source terms, and the resulting photon flux trends are benchmarked…

The effective optical constants (EOCs) of a 480 nm tungsten trioxide (WO 3 ) thin film deposited on fluorine-doped tin oxide (FTO)–coated glass were determined from collimated transmittance and reflectance measurements over the 250–2500 nm solar spectral range. The WO 3 EOCs were obtained by fitting the experimental spectra with the four-flux model (4FM), using previously determined optical const…

Surface roughness in the top protective layer of a surface plasmon resonance (SPR) sensor degrades performance by introducing reflectivity fluctuations, broadening the resonance dip, and reducing the accuracy of resonance-angle estimation. In practice, obtaining a perfectly uniform barium titanate (BaTiO 3 ) protective coating over a commercially sized SPR chip is difficult; therefore, signal pro…

The deployment of 6G network requires multiple number of antennas at the base station with multiple signals that undergo constructive interference to create thinner beams with more energy so as to mitigate path loss. This will support higher data rates, lower latency levels, and improved energy efficiency. This paper proposes a phase-shifting technology for beamforming that focuses radio energy t…

The article presents the design and implementation of a low-cost, easy-to-implement, Arduino-based computer-numerical-controlled (CNC) laser cutting and engraving device. By means of a CNC shield and appropriate drivers, as well as the G-code Reference Block Library firmware, the Arduino-Uno board can control the motion of the motors and the laser head of the CNC device, enabling the laser (which…

In this paper, we investigate the adverse atmospheric effects, including wind disturbance, dry fog, wet fog, and smoke conditions, which are simulated on an atmospheric testbed specifically built for free-space optical communication (FSOC) experiments. We have also developed an FSOC system that can modulate the optical signals with the choice of the modulation, encoding scheme, and encryption. A …

Three-media planar dielectric nonmagnetic optical waveguides represent basic structures employed in integrated optics and sensing. The previously published scaling rules for transverse electric (TE) and transverse magnetic (TM) modes in these structures were characterized with different sets of parameters for TE and TM cases. The latter case which is more involved received less attention. The pre…

Accurate prediction of the elastic properties of chalcogenide glasses (ChGs) remains a long-standing challenge due to the structural complexity of amorphous networks and the limited availability of reliable mechanical measurements. In this work, we develop a set of numerical estimator algorithms capable of predicting Poisson's ratio, Young's modulus, the Bulk modulus, and the Shear modulus of a C…

Work is reported on thermal-induced redshifts of quantum particle plasmon. The redshifts are predicted to be caused indirectly by the quantum size effects. The particles are enlarged when temperature increases, and consequently, quantum size effects modify the plasmon but not the band structure. It has been modeled for metallic quantum particles. The results are also instructive to other quantum …

Work is reported on optical antennas of complex molecules. Optical antennas of a nanometric particle are widely considered for light relays in various on-chip applications. An appealing candidate for an optical antenna is a complex molecule, for example, a huge cell containing a few hundred atoms. The optical properties, such as the radiation patterns, of the antennas may be optimized. The optimi…

Underwater wireless optical communication (UWOC) often suffers from channel-induced bit errors that degrade adaptive threshold detection, particularly due to dynamic turbidity conditions. Standard approaches of applying mitigation techniques may improve the link performance to an extent. In this study, we have incorporated an integrated approach based on machine learning (ML) into the UWOC system…

This study outlines the low-cost synthesis of copper-doped zinc oxide (Cu:ZnO) thin films using a chemical bath deposition method performed at 50 °C. A detailed investigation of their structural, optical, and electrical properties was conducted. X-ray diffraction confirmed the successful integration of copper within the ZnO lattice, resulting in a hexagonal Wurtzite structure and an average cryst…

This study investigates the optical and dielectric properties of nitrile butadiene rubber (NBR) reinforced with varying concentrations of N220 carbon black (CB). Ultraviolet (UV)–visible spectroscopy, in the range of 200–800 nm, was used. The optical spectrum showed a high absorption peak at approximately 220 nm, indicating that the material is suitable as a strong absorber of ultraviolet radiati…