Published in Applied Physics B
We propose a transmissive circular polarization converter with reduced thickness and high performance. The proposed device is composed of a three-layer metasurface spaced by two dielectric plates. The top and bottom layers are metasurfaces formed by meander lines, and the middle metasurface is a modified fishnet structure etched periodically with g...
Published in Applied Physics B
A detailed investigation is performed to obtain optimized optical performance of polar III-nitride single quantum well (SQW) semiconductor lasers by band engineering through symmetric and asymmetric tuning of device parameters. Electronic, optical, and threshold characteristics are calculated to analyze the effects of band engineering on device per...
Published in Applied Physics B
Lithium Niobate (LiNbO3; LN) nanoparticles were dispersed into a polymer matrix, poly(methyl methacrylate) (PMMA) to prepare an organic–inorganic hybrid LN/PMMA nanocomposites. When no electric field was applied during dispersion, the polar LN nanoparticles remain randomly oriented in the PMMA and unpoled nanocomposite is obtained. In this work, po...
Published in Applied Physics B
Allowing for the simultaneous determination of the photocarriers drift mobilities and their small-signal recombination lifetime, the Moving photocarrier Grating Technique (MGT) is a useful characterization tool for photoconductive semiconductors. This technique is based on measuring the steady-state direct current induced by an interference pattern...
Published in Applied Physics B
A novel configuration of a low-aberration single diffraction grating stretcher for femtosecond chirped-pulse amplification lasers is proposed. The stretcher configuration employs two identical concave parabolic mirrors separated by a distance equal to their focal length. Using the numerical ray-tracing approach, the proposed design is compared with...
Published in Applied Physics B
The interaction of linearly polarized light with self-assembled photonic crystals (opals) grown from polymeric colloids is studied. The experimental work is carried out on opals with and without dye molecules. These active and passive opals influence the polarization state of transmitted light very differently and the role of photonic stop band is ...
Published in Applied Physics B
A binary phase-only modulation technique was proposed to focus and scan light through a multimode fiber (MMF) based on spatial light modulator (SLM). For the same number of modulation modes, the number of iterations using this method is only 1/256 of that using phase-only iterative optimization or 1/3 of that using phase-only computation optimizati...
Published in Applied Physics B
The harmonic generation efficiency of a large aperture KDP (KH2PO4) crystal that is used in the Final Optics Assembly of high-energy solid-state lasers is one of the key points to achieve inertial confinement fusion. The variations in the detuning angle of a KDP crystal are achieved by interferometer and calculation. The harmonic generation efficie...
Published in Applied Physics B
To control the polarization of 850 nm multi-mode oxide-confined vertical-cavity surface-emitting lasers (VCSELs), monolithically integrated surface gratings are investigated. VCSELs with different grating parameters are simulated by the rigorous coupled-wave analysis (RCWA) method. Optical field intensity of two polarization orientations with diffe...
Published in Applied Physics B
Circular Airy Gaussian vortex (CAGV) beams have gained great popularity in areas of research such as optical tweezers and optical communications due to their fascinating properties, such as auto-focusing and self-healing. The propagation dynamics of these beams is dictated by their topological charge and launch angle. For example, larger topologica...
